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Vehicle Vetters Mobile vehicle inspection and personal vehicle advisor service; launching in Los Angeles County, 8/1/2026.

$300 Impala UPDATEBought this car for $300 at a tow yard auction in Oregon about two years ago, for my son Brandon Duple...
09/10/2026

$300 Impala UPDATE

Bought this car for $300 at a tow yard auction in Oregon about two years ago, for my son Brandon Duplessis. The idea was for me and him to work on it together and fix it up. We never had a chance to do that. Brandon passed away on 7/29/2025 in a hit & run in Los Angeles. I decided to keep the car, as he really liked it (he specifically liked the taillights/the way it looks like it has four big round red taillights with the backup lights being round and about the same size as the taillights next to them; he also liked the fact that it gets such good gas mileage).

I drove up to Oregon in June with a utility trailer in tow and snatched the car up from the tow yard I bought it from. I towed it back to Los Angeles. To my surprise, the battery in the car was and is still in PERFECT shape; jump-started it once when I first got it back down here, and I've been driving the car daily ever since (since around June 7).

I've put a little over 5,000 miles on the car since I've gotten it back here. Gas mileage indicator is a bit optimistic; ACTUAL MPG on this tank is 24 (it usually reads about 1.5-2.0 MPG higher than actual). But still, my previous daily driver got about 9.25 MPG over a mixed tank. That's literally about a $2,390 DIFFERENCE In fuel costs over the last 5,000 miles!

I have literally done NOTHING to the car since I had it either; had to change the water pump....that cost me $29 and some coolant. THAT. IS. IT.

They (ESPECIALLY GM) don't make 'em like they used to!! I'm literally "in" this 24 year old, 189k mile "American" car about $329 + $200 or so for two years registration and transfer fees.

ALMOST broken in!
08/27/2026

ALMOST broken in!

08/22/2026

2007 Dodge Dakota
COMPLETELY DESTROYED lower left ball joint -
It literally got pushed completely through the control arm and is just sitting there....
Truck still drives pretty much straight, doesn't pull, and the squeaking noise is gone (hahaha)...
Going to drive at 15 miles to the shop.
Most other vehicles would not be drivable; I don't know if anybody has had a ball joint break (especially a lower ball joint) before on a Crown Vic or Town Car or a Tacoma...but NOT drivable; the front wheel usually folds up underneath the fender and pushes back INTO the wheel well.... They sure don't make them like they used to! 203,683 miles on the truck when it happened. Original ball joints. And this truck has been THRASHED in every which way over the last 20 years of its life!

07/26/2026

Four 4.6 liter V8s.
Five 5.4 liter V8s.
Three 6.8 liter V10s.

Ford's "modular" engine family. Not all modulars were created equally - some of them were great and practically bulletproof; some of them will blow up if you look at them sideways.

Here is the breakdown.

The first of this engine family was the 4.6 liter single overhead cam, 16 valve V8. The engine originally debuted in the all-new 1991 Lincoln Town Car. The new engine wasn't much more powerful than the 302 cubic inch, 4.9 liter ("5.0") it replaced, making 190 horsepower @ 4,200 RPM/260 lb. ft. of torque @ 3,200 RPM with single exhaust, and 210 horsepower @ 4,600 RPM/270 lb. ft. @ 3,400 RPM with dual exhaust. However, it did provide slightly better fuel economy - these big boats could easily achieve well over 20 miles per gallon highway.

For the 1992 model year, the redesigned Crown Victoria and Grand Marquis got the new engine. In 1994, so did the Thunderbird and the Cougar. The Mustang GT came next, in 1996; with 215 horsepower @ 4,400 RPM and 285 lb. ft. @ 3,500 RPM (a tiny bit more than the 5.0 put out in 1995). The trucks and Econoline vans all got the new engine for the 1997 model year, as did the new Expedition.

New for 1997 was Ford's 5.4 liter modular V8. The 5.4 used the same 3.552" bore as the 4.6, but was a tall deck design that ran a 4.165" stroke (compared to the low deck 3.543" of the 4.6). This severely under square design gave the new 5.4 excellent low end torque - 330 ft. lbs. at only 3,000 RPM - several hundred RPM sooner than the advertised torque peak of even the 5.7 liter pushrod "Vortec" V8 in Chevy/GMC trucks, as well as the 5.9 liter "Magnum" V8 in Dodge Rams. Quite an engineering feat at the time.

Also new for 1997 (in the Econoline) was a 6.8 liter V10, which was basically a 5.4 with two additional cylinders and a massive balance shaft under the left valve cover (which kept the naturally unbalanced V10 from vibrating itself to pieces at higher RPM). The new V10 was initially available in Econoline E250 and E350, as well as chassis cab vans. The F-Series wouldn't receive the V10 until the all-new F250/F350 came out, in 1999.

The horsepower/torque race was on. GM was moments away from releasing their all-new 4.8, 5.3 and 6.0 liter powerplants, which were derived from the "LS1" 5.7 liter V8 that blessed the Corvette in 1997 and the Camaro. Z/28 & SS in 1998. Ford responded by coming out with "Performance Improved" versions of all three modular engines. The "PI" package included completely redesigned cylinder heads with improved combustion chamber and port designs, slightly bigger exhaust valves (1.417" vs. 1.34" in the outgoing "non-PI" engines), a revised intake manifold and a slightly hotter cam profile. Pistons were also changed to keep compression manageable with the new combustion chamber design.

The 5.4 and V10 got this treatment first - F-Series and Econolines all had "PI" engines for the 1999 model year, the same year GM released their new engines in their new Silverado and Sierra pickups. And it's a good thing they did; the new GM engines (although a bit soft off the line) were pretty damn stout in the horsepower department. The PI treatment at least made things competitive between the two automakers, for at least a few more years.

The 1999 F250 and F350 were the first to receive the "PI" version of the 6.8 liter V10. In these trucks, the V10 made 310 horsepower @ 4,250 RPM - exactly the same as the Dodge Ram's 8.0 liter pushrod V10, but 150 RPM higher. The only thing was, the Ford engine, with a massive 1.2 liters less displacement, was a revver. It made 425 ft. lbs. of torque at 3,250 RPM, compared to 450 @ 2,400 in the big Dodge. On the road, however, both trucks performed quite similarly - until weight was added. The extra cubes of the Dodge got things going a little better than in the Ford, which was always working extremely hard to keep up. It could definitely keep up though-it just had to scream in doing so.

As for the 4.6, the first model to get the "PI" treatment was the 1999 Mustang GT. Next was the 2000 Econoline E150, then the 2001 Panther platform (Town Car, Crown Vic and Grand Marquis), F150 and Expedition. The Explorer and Mountaineer got it in 2002, and the Econoline E250 was first available with the 4.6 ("PI") for the 2003 model year.

The modular engines had mostly proven themselves by the end of the 1990s. I say "mostly" because while they were incredibly stout performers, a somewhat major issue surfaced in the late 1990s - spark plugs were literally blowing out of the cylinder heads. It turns out that somewhere along the production run, something was changed with tooling and cylinder heads (both non-PI and early PI heads) were only given 2 to 4 threads per spark plug hole. This created a major warranty problem and a reputation hit for Ford. Owners were afraid of changing their spark plugs, as that was usually when the problem became most apparent. The only options once these plugs blew out were either to replace the cylinder head, or install thread inserts (which could be impossible in many cases, with the cylinder head on the vehicle). Repairs would easily run into the thousands of dollars. Aside from the whole spark plug fiasco, however, these engines were generally well-received and earned quite a loyal following over the years.

I almost forgot the Supercharged 5.4 liter (the SOHC version), which was basically a PI 5.4 with a supercharger bolted on. Same engine. Same camshafts. Supercharger. Different tune. This was used in the 1999-2004 SVT Lightning F150, as well as the 2002-2003 Harley Davidson F150.

Ford also came out with DOHC, 32-valve versions of both the 4.6 and the 5.4. Select Lincoln models were the first to get the DOHC 4.6, in the mid-1990s. The 2000 Mustang SVT Cobra R got a specially-tuned DOHC 5.4. The Navigator got the DOHC 5.4 from 1999-2003. The 2005-2006 Ford GT got a supercharged DOHC 5.4, as did the 2007-2012 Shelby GT500. The supercharged 5.4s were kind of unrelated to the standard DOHC 5.4s; cylinder heads are quite different, for starters. They're really only related in displacement. Now back to the more "conventional" modular engines!

By the very early 2000s, the horsepower war was heating up. Nobody was satisfied with what they had anymore. All three manufacturers were constantly trying to find "more". More power. More torque. More MPG. And our lovely government was constantly tightening the "environmental" noose - manufacturers were under more pressure than ever to come out with "cleaner" engines that got better fuel economy.

For the 2004 model year, Ford burdened the F150 with what would soon be known as the WORST engine to ever be installed in a Ford truck. Enter the "3 valve" 5.4 V8. This was essentially a 5.4 with an all-new set of cylinder heads that featured 3 valves per cylinder - two smaller intake valves and one bigger exhaust valve and variable camshaft timing. The new engine performed decently, making 300 horsepower @ 5,000 RPM. While quite a bit more than the outgoing "2 valve" 5.4 (260 horsepower @ 4,500 RPM), the new engine was a bit soft off the line, needing 3,750 RPM to access its full 365 ft. lbs., whereas the outgoing 5.4 only needed 2,500 RPM for its 350 ft. lbs. This could be a night and day difference in getting a heavy load moving, but the 3 valve easily pulled away from the older trucks once it DID get moving - it was a screamer in comparison.

The 3 valve, however, was kind of a case of "too little, too late" (is that a saying? It is now!). Dodge's pushrod 5.7 liter HEMI V8 (already powering their 2500 and 3500 Rams, as of 2003, and for 2004, in Ram 1500) was pumping out 345 horsepower @ 5,400 RPM and 375 ft. lbs. @ 4,200 RPM. GM was currently getting 300 horsepower and 360 lb. ft. out of their 6.0 liter, used in 2500/3500 and "HD-1500" pickups. Ironically, however, they did have a "345 horsepower" version of the 6.0 in their new-for-2003 Silverado SS (which also supposedly made 380 lb. ft., as opposed to the HEMIs 375). Ooooh the numbers games....But let's get back to Ford-

So the 3 valve 5.4 was already a bit of a letdown. Ford would also release a 3 valve version of the 4.6 in the 2005 Mustang GT, making 300 horsepower @ 5,750 RPM and 320 torques @ 4,500 RPM. A bit more respectable, in comparison (I guess); the new engine actually pushed the redesigned Mustang DEEP into the 13s, a much- welcomed improvement!

The F250 & F350 got an all-new 3 valve V10 for the 2005 model year. The new V10 made 362 horsepower and 457 lb. ft. of torque. While this was a noticeable improvement, the torque came in a bit higher, so real-world performance was not as different between the new engine and the previous year's engine, as one would expect. Dodge axed their V10 for the 2004 model year, however, leaving the Ford as the only available V10-and the biggest, most capable gas-powered engine in the light duty truck market. Ford's F53 chassis (basically Class A motorhomes) got the new 3-valve engines late in the 2005 model year. Ford finally had something that could compete with GMs Vortec 8100 - but GM still had the Allison transmission, which was a 6 speed for the 2006 model year. So that battle was a bit of a toss-up.

It didn't take long before problems started showing with the new 3 valve engines. Camshaft phasers on the 5.4 and 4.6 liter engines started to rattle, and were being replaced left and right - only for it to happen again. And again. And again. Luckily for the V10, it didn't use variable cam timing. So no phasers to fail. But even it wouldn't be immune to the major problems that happened at higher mileage. Once all of these 3-valve engines reached the upper levels of 5-digit odometer readings, many of them showed oil starvation problems, caused by low oil pressure. This would literally destroy camshaft journals, as well as the cam towers and camshaft caps (which are machined to maintain precise, tight tolerance when encasing the camshaft between the two). In severe cases, the camshaft would literally "weld" itself to the cam towers/camshaft caps. Roller rocker arms were failing, sometimes launching themselves out of place. Valves were getting mangled in the process. As oil pressure got lower and lower, engine timing components were failing. Guides and chains would break in severe situations, causing pistons to hit valves. Engines would lock up due to low oil pressure. It was all BAD. The main causes for these major 3 valve engine woes would eventually be attributed to a combination of them having a subpar factory oil pump, tiny oil passages in the cylinder heads (necessary for operation of the variable cam timing), and a horribly-designed "paper" gasket between the variable cam timing solenoid and the cylinder head (when the gasket fails, oil pressure is lost). Since the V10 didn't have variable cam timing, it was definitely the most reliable of the three engines. However, these still had similar issues with camshaft failure (and ultimately engine failure), as they still have terrible oil pumps.

To make matters worse, most people had no idea what exactly was going on with their engines. The first sign of trouble was more often than not, a noisy (rattling) camshaft phaser. So the "fix" was generally to replace the phaser. This would sometimes "work", for a little while. But the main reason these phasers failed in the first place was because of the oil pressure issues (caused by a weak oil pump AND by the tiny oil passages in the head being clogged with debris/dirty oil/sludge). So the NEW phasers (which rely on oil pressure and clean oil to function) would fail AGAIN shortly after, if the other issues weren't addressed when they were replaced (which they NEVER were). It was a DISASTER for Ford. It still is. As a mechanic and an engine machinist myself, I can say this -

The ONLY way to make a three valve engine last, is to:

1. Replace the factory oil pump with a good, high volume unit

2. Use only high quality, fully synthetic 5w30 engine oil, and change it every 7,000 miles

3. Make SURE oil passages are 100% free and clear of any debris that may block oil flow! This may be hard, without removing and thoroughly cleaning the cylinder heads.

4. Make sure phasers are 100% functional, not making any noise; would be a good idea to buy the most current "updated" ones FROM Ford, and have them installed. Do NOT buy aftermarket!

If you follow those 4 steps PRECISELY, you should get at least 50,000 miles out of your 3-valve engine before needing new cam phasers (again, they're also just a S**T design, even if they receive adequate oil pressure, they're just horrible quality parts). You MAY be able to get 100,000 out of them, but I wouldn't expect much more. If you DON'T replace them when they start rattling, you WILL damage the engine from debris that is introduced into the engine oil FROM the failing phaser(s)!

The only other option is to install a camshaft "lockout" kit-- this will lock out the cam phaser, essentially making the engine a NON-variable cam timing engine. You will lose some horsepower and you will lose some torque. You will lose a little throttle response. You might lose a mile per gallon. But your engine will last. Ford does NOT know how to make an engine with variable cam timing - EVERY SINGLE FORD ENGINE EVER MADE THAT HAS VARIABLE CAM TIMING/VARIABLE VALVE TIMING, WILL EVENTUALLY HAVE A CAM PHASER OR TWO THAT FAIL. IT IS INEVITABLE! I don't know WHY this is. Cheap parts and mediocre parts suppliers would be my best guess.

If you don't wanna put these thousands of dollars worth of work into your three valve Ford engine, SELL THE VEHICLE. Because you WILL have problems with it. Go get yourself a two valve!

I almost forgot (again)-
The 3 valve engines permanently fixed the "spark plug thread" problem (actually, that was fixed in 2 valve engines by the 2002 model year). Ford's NEW spark plug game, being played by 3 valve engines from 2004-2008, was known as "Special Two-Piece Spark Plug Breaks INTO Two Pieces When Being Removed! Plug Is Now Broken INSIDE The Head and the head must be removed!" (Basically). Ford again "fixed" this braindead issue with a 2009 redesign of the 3 valve cylinder heads (along with using a more conventional spark plug).

I hope this clears some things up for anyone thinking of getting into an older Ford product - especially if you're thinking "older is better than the crap they make today", which is NOT always true! 2 valve? Good! 3 valve? Bad!

Vehicle Vetters

****MIND YOUR GAUGES!!****I'm sure most of you out there have overheated something you were driving at one point or anot...
07/25/2026

****MIND YOUR GAUGES!!****

I'm sure most of you out there have overheated something you were driving at one point or another in your lives. Overheating SUCKS. I'd also be willing to bet that some of you have overheated more than one vehicle. To THOSE folks, I have a couple of questions:

1. Did the vehicle have a temperature gauge, or just a warning light?

2. If it had a gauge, did the indicated temperature rise slooooooowly from the middle towards the top/towards the "overheat" ("H" or red mark) as you kept driving? Or was everything okay one second and then the gauge rapidly shot up to the "H"/to the red mark?

If it had a warning light, skip to question 3.

3. If the gauge did get to the "H"/to the red mark (or of your vehicle only had a warning light/warning message saying the engine was hot), did you end up causing damage to the engine (blown head gasket, cracked cylinder head, other major engine damage)?

4. If you did cause damage, how long would you say you allowed the engine to run once it was in the "H"/at the Red line, or once you first saw the "engine hot" warning/whatever warning light came on?

There's something odd about the way SOME cars overheat, especially when compared to others. There are some cars that can be driven for several minutes or even miles after the temperature gauge begins rising from the "middle" (the "normal" zone), before the gauge pointer begins to even touch the "HOT" mark. On these cars, as long as you turn the engine off RIGHT before it reaches "HOT" (or that solid RED line at the top), you usually will not damage the engine.

And then there are the cars that will literally go from the "middle" of the gauge and shoot RIGHT on up to "HOT"--and probably took no more than 5 to 7 seconds for the gauge pointer to move that little distance! If your car was like THIS one, chances are pretty high that you ended up blowing a head gasket (or worse); EVEN IF you turned the engine off as soon as you saw it get NEAR the "HOT"!!

WHY is that??
BOTH engines didn't even touch the "HOT".
BOTH engines were switched off RIGHT before the gauge pointer touched the "HOT". What gives? What's the score? What's next??
----------
THE TRUTH ABOUT ENGINE OVERHEATING IN RELATION TO ENGINE TEMPERATURE GAUGES AND ENGINE TEMPERATURE "HOT" WARNING LIGHTS:

Not all engine temperature gauges work the same. There are basically a handful of different style engine temperature warning systems that have been used across all auto manufacturers for the last 100 years or so. We will go over them all here.

1. NO GAUGE (WARNING LIGHT ONLY); ALSO CALLED AN "IDIOT LIGHT" OR "DUMMY LIGHT":

This is the most primitive system out there. This system was mainly used on cheap, basic transportation vehicles, AMERICAN luxury vehicles (manufacturers used to assume the well-to-do didn't wanna worry about looking at a temperature gauge, so they typically just got a warning light, even in very expensive Cadillacs and Lincolns), and "strip-down" performance/specialty vehicles (where drivers/owners only cared about going fast, or doing whatever it is they bought the vehicle for).

This system basically relies on a simple "on/off" switch/sending unit screwed into the engine or cylinder head, that has variable resistance but only two "positions". When the engine reaches a certain temperature (usually above 230-235 or even 240 degrees fahrenheit), the resistance in the switch changes and sends the proper voltage to the warning light on the dash. You now have an "ENGINE HOT" light (or whatever your light/message says) showing on your basic dash/basic instrument cluster.

The PROBLEM with this simple system is that internal combustion engines were not meant to run much past 225-230 degrees for any length of time. Even 220 degrees is SUPER hot for most cars built before the 1990s. Once an internal combustion engine reaches 235-240 degrees, major engine damage typically happens within a matter of minutes or even seconds. So when that light comes on, you better turn that fu**er OFF (and even that's risky, as the engine will begin to heat soak as soon as it's turned off, increasing temperature even further; but at least it won't continue getting hotter AS it is running, which is almost always worse).

At 245-250 degrees, it's pretty much all over within 30 seconds or less. Complete meltdown. Blown head gasket(s) at the very least. Cracked cylinder heads (especially if you have cast iron heads or anything Japanese or Domestic from the 1980s, 1990s and 2000s).

So in a nutshell, warning lights are DANGEROUS-
And in a sense, pointless. This is why they are frequently referred to as "dummy" or "idiot" lights...because by the time you see them, you're usually FU**ED.

MODERN (AND SOMEWHAT MODERN) MODELS THAT ACTUALLY USE "IDIOT"/"DUMMY" LIGHTS (THAT WILL NOT SAY "HELLO!" UNTIL ITS (USUALLY) WAAAAAAAAAAY TOO LATE ("THAT FU**ER POPPED UP OUT OF NOWHERE!!"):

-2010-2017 Toyota Prius and 2011-2017 Lexus CT200h (both using the 2ZR-FXE engine) do not have gauges. They have "idiot lights". And guess when those lights actually light up to tell the driver there's a major problem? Literally at a hot enough temperature to where the head gasket is pretty much guaranteed to already be wasted. These cars are NOTORIOUS for blown head gaskets and have been keeping LOTS of repair shops busy for at least the last 15 years. I've met repair shops that literally keep "extra" 2ZR-FXE cylinder heads IN STOCK because they get so many Priuses coming in with blown head gaskets...they just grab a rebuilt head off the shelf, throw it on and call it a day. Or call it the next 75-100k miles (it WILL happen again. Because it's a Prius.

-2014 to (possibly) current Subaru Forester (don't quote me on this; I'm not 100% sure, but sources point to this being the case)

-2009 to 2024 Subaru Outback/Legacy Outback

-Various 2009 to 2024 Subraus

-ALL years of Toyota Yaris and Echo

-2004 to 2006 Scion xA

-2004 to 2015 Scion xB

-2012 to 2015 Scion iQ

-2011 to 2016 Scion tC

-2010 to 2013 Kia Soul (BASE and lower trim levels)

-2012 to 2013 Kia Rio
-2009 Kia Sportage
-2006 to 2011 Hyundai Accent
-2007 to 2010 Hyundai Elantra

-2007 to 2020 Honda Fit
-2012 to 2015 Civic (lower level trims/models)
-2016 to 2022 Honda HR-V (base/lower models)
-2011 to 2015 Honda CR-Z Hybrid

-2017-2024 Nissan Versa (lower trims/models)

-1984-2001 Jeep Cherokee (XJ) SOME BASE models
-SOME base model 1997+ Jeep Wranglers

2. SWEEPING MECHANICAL (ANALOG) TEMPERATURE GAUGE:

Not all gauges are made equal! There are several different setups here. The first and simplest, for example, would be (most) American cars from the 60s, 70s and 80s. These had true sweeping gauges that received voltage from a true variable resistance temperature sending unit (switch). These gauges were not the most accurate (like you couldn't really rely on them to give you the precise degree of things), but they did show a pretty accurate picture of whether or not your engine was running cold, running like normal or running TOO hot. That is, when the gauge and the sending unit are working.

A lot of modern vehicles (Domestic, Japanese, European, all of them) use similar setups to these old cars, only with more precise sending units, wiring and gauges; you're in the technological "sweet spot", where technology had begun to peak, and manufacturers still haven't really begun to try to screw the customer at every single turn, by hiding, manipulating or flat-out falsifying things. These are probably the best of the best. What you see on the gauge is what's there. You won't find a more accurate ANALOG representation of how hot (or cold) your engine is.

SOME EXAMPLES OF VEHICLES MADE IN THE LAST 30 YEARS WITH THIS TYPE OF GAUGE OPERATION:

-'88-'99 Chevy C/K and GMC C/K pickups
-'88-'94 Chevy K-Blazer
-'88-'99 Suburban
-'95-'99 Tahoe and Yukon
-'00 Tahoe Limited
-Late model Chevy Malibu (and probably earlier)
-Late model Corvette (and probably earlier)
-'95-'99 Neon
-'93-'00 Civic
-'97-'02 Accord
'-00-'05 Impala
-'83-'05 (ALL of them) S10 Blazer/S15 Jimmy

3. BUFFERED MECHANICAL/ANALOG GAUGE WITH "SAFE ZONE" (BASICALLY AN "IDIOT GAUGE"):

Imagine you own Ford. Or General Motors. Or even Toyota. Your service departments are constantly complaining about vehicle owners bringing their new cars in to have them looked at for "overheating", or even "running hotter than normal". You have to constantly explain to the customer that there is a "normal operating range" for their engine, and that range can & will fluctuate anywhere between the temperature the thermostat opens at (between 180 and 205 degrees, on most vehicles), and about 225 degrees under the most extreme operating conditions. But some vehicle owners understandably just don't seem to get it.

The solution:
By the early to mid 1990s, manufacturers started routing the signal from the temperature sending units through the engine computer and then to the instrument cluster. This granted the computer the ability to modify the signal to the gauge. These manufacturers (some of them, I will get into which ones do this in a bit) would then modify the signal going to the gauge. It works something like this:

From when the engine is cold until it reaches "normal operating temperature" (usually sometimes after the thermostat opens), what you see on the gauge is what you get.

At "operating temperature", the gauge will read AT the middle of the gauge or a little lower than the middle. And there it will STAY, even if actual engine temperature varies slightly. Even if the engine temperature spikes by as much as 20-25 or more degrees, the gauge will remain right where it has been-in the middle or slightly before the middle. BUT...

As SOON as these engine temperatures cross the lower end of the threshold - the exact moment that is considered "TOO Hot", that gauge will be sent a different signal (voltage) from the computer, and indicated engine coolant temperature will RAPIDLY spike on the gauge. This makes it seem like the engine in question suddenly went from "the middle, ALL the way to HOT", within a matter of seconds! Although the reality of it is that the engine was already starting to overheat, probably at least 10 to 30 seconds ago (or even minutes ago). By the time THIS style gauge reaches HOT, that engine has definitely overheated. Turn that fu**er OFF!!

I like to call this a "SAFE ZONE" (the in-between of temperature low/high points, where the gauge itself stays in the same exact position). Some refer to it as a "DEAD ZONE". The gauge only rises once the engine actually exceeds the "high" limit of the dead zone.

EXAMPLES OF VEHICLES MADE WITHIN THE LAST 30 YEARS THAT USE "SAFE ZONE" BUFFERING:

-'97-'23 F150 (will read "normal" until around 230 degrees)

-'97-'22 F250/F350/F450/F550 (same as above)

-2nd Gen Tundra & Sequoia (will show normal range if engine coolant temperature is between around 170 and 220 degrees; north of that, it's PARTY time!). Imagine you're towing a 7,000 lb. trailer in the Rockies in the dead of Summer. You're watching your gauges like a good Toyota owner. All is good. Look pops - the temperature gauge hasn't moved one bit! And then suddenly, the LOUD Toyota warning chime sounds. You look at the temp gauge and panic - it's literally gone from right in the middle, to right at the top by the time you reacted to the chime. This isn't because you overheated FAST; it's cause you were already WELL on your way to 220 while you were admiring your "half way on the gauge".

-Ford "Panther" platform (Crown Victoria, Grand Marquis and Town Car); pretty much all years without the digital cluster (I'm not sure about those at the moment, but this is for the analog gauges): These will read in the middle as long as engine temperature is between around 165 and 235 degrees! I can tell you from experience as a once-owner of a 1998 Crown Victoria, that these things go from "half way" to FULL ON "HOT" within a matter of like 3-4 seconds! Now does THAT give the operator ANY time to look around for somewhere to pull over, to get over and then start braking, to pull off the road and then turn the engine off? HELL naw it don't! And ALL in the name of reduced warranty cost/reduced dealership headache.

-'88-'95 4Runner. I don't have the operating "safe range" of these, but it's a pretty wide one. These were notorious for going from the "middle" to the HOT on the gauge. And 3VZ-E powered units were literally the most notorious head gasket monsters of ANY V6 made in the history of the world. Look up "Toyota V06 campaign". It was MASSIVE.

-Tacomas, T100s and Toyota "pickups" from the same era. Same thing.

-'96-'02 4Runner. Around 170-230 degrees on the gauge is the "safe zone". Annnnnnnd a literal TON of these things (5VZ-FE powered ones, that is) blow head gaskets. Not quite as bad as the previous (2nd Gen) 4Runners with the 3VZ-E engines, but still pretty darn frequently. The heads will also crack if they get hot enough. Also when the 4 cylinder models get hot, THEY blow head gaskets. A LOT. They crack the heads also.

-Tacomas and T100s from the same era. Same thing.

-Your late model Civic and Accord (170-220 degrees is "normal" on the gauge)

-160 to 220 on a late model Subaru

-160 to 220 on a late model Corolla

-as much as 15-20 degrees above normal operating temperature in a late model Kia or Hyundai (should be around 225-230 degrees, or even more). As if Kia and Hyundai (and Kia/Hyundai owners) didn't already have MAJOR things to worry about with their wonderful engines and their faulty lubricating systems 🙄...

-Late model Mazdas are somewhere around the above

-Late model Honda Ridgelines should have somewhere between a 170 & 215 degree safe zone

-Late model Honda Odysseys should be between 160 & 210 degrees

-a 2020 Jeep Wrangler (for example, most late model Wranglers should be the same) should be between 190 and 230 degrees. Once your "cool running" Jeep reaches 231 degrees on that steep, long trail in Death Valley in the middle of summer, you're gonna see some serious s**t! Nice of Chrysler to build such a "safety net" into these things (hey, at least it's better than every Jeep owner bringing their toy into service because it regularly goes from 1/2 to 2/3 on the gauge, on a hot day!!)

-2005-2010 First gen. Chrysler "LX" cars (Charger, Magnum, Challenger, 300C): THESE are a sore point for me in particular, as I used to own one. It was on its third engine when I got it. The first two had dropped valve seats and destroyed themselves. The car had never actually "overheated", but the gauge did spike rapidly from the middle, towards the top on a few occasions. First was right before the first engine dropped a valve seat. Second was right before the second engine dropped a valve seat. Lots of these HEMIs dropped valve seats and met similar fates. Could it be that because of the stupid "safe zone", the owners didn't have ANY time to realize they were running a bit hot and actually turn their engines off? I'd say so. Safe zone on 1st Gen LX cars : between 180 and 215 or 180 and 220 degrees!

-Chrysler 200: Safe zone between 195 & 220 degrees

-2020ish BMWs/Late model BMWs: Has a 40 DEGREE range before the gauge will leave the middle! That engine is DONE!

-2020ish/late model Range Rover: 180 to 225. By the time that gauge starts moving past the middle, WHATEVER engine you have in that thing is guaranteed to have blown a head gasket, at the very least

-2020ish/late model Jaguar: Same as Range Rover

-2020ish Volvo: 175 to 238 degrees. Yeah, a Volvo that moves past the middle has instantly become a NOlvo (look up the English meaning of "Volvo")

-2019-2020 Nissan: These have a 20 to 30 degree threshold. So pretty similar to most of the vehicles above; maybe a liiiiiittle better/safer. Not much.

-2020ish Camaro: 185 to 225 degrees. I don't know about you, but I wouldn't want my 6.2 liter Camaro reaching much beyond 225 degrees. That thing is probably toast. And the 3.6? Those don't even stay together if you run them cool.

-Chrysler PT Cruiser: Another braindead one from Chrysler; these 2.4s are already suuuuuper weak when it comes to the head gaskets. But let's throw a 180 to 220 degree safe zone in there! Um.... If that temperature gauge EVER moves past the middle, call Pick your Part.

-2nd Generation (2000-2005) Dodge Neon (THIS one I have to verify, but it makes sense). I don't have a safe zone range, however. Just be careful. These things were pretty good at not overheating though, unlike some of the 1st Generation ones.

-1st and 2nd (and probably every one since) generation MINI (the modern, BMW-built ones). 167 to 234 degrees for the first Gen (YIKES!!), and 190 to 230 degrees for the 2nd Gen. It's sooooo common for these to blow head gaskets... I'll bet it wouldn't be if they had ACTUAL temperature gauge readings!!

-2001 to 2005 Civic: 170 to 220 degrees. I'm currently working part time at a machine shop. We rebuild a TON of cylinder heads off the 1.7 (D17) Honda engines that come out of these things. They blow head gaskets left and right. Always have.

-'04-'10 Accord (approximate, this body style): 180 to 220 degrees.

-Ford Ranger (when it was an actual truck, not the NEW "Ranger"): Heavily buffered safe zones, probably the same as the '97-'03 F150. I've seen more 3.0 liter and 4.0 liter V6s from Rangers blow head gaskets (3.0 and 4.0) and crack cylinder heads (3.0) that probably any other truck ever made. They'll go from "Normal operating temperature" to HOT in literally like 2.0 seconds. Too late.

-1st Generation (2004-2012) Chevy Colorado/GMC Canyon: 190-210ish degree "safe zone"

-2nd Generation (2015-2022) Colorado/Canyon: Same as 1st Generation

-2024+ Ford Ranger: 195-220 degree

-2022+ Ford Maverick: 185 to "well past 225" 😂😂
..........................................................^^^^THIS^^^^ is NOT a good idea when your only available engines are little tiny EcoBoost/4 cylinder Ford engines that are already SERIOUSLY prone to blowing head gaskets, that have heads that literally "leak" coolant out of the castings because of "porous" metal.... Way to go, Ford!

For the love of God, PLEASE DO NOT buy ANY three or four cylinder EcoBoost.....in ANYTHING. EVER! You've been warned!

'02-'09 Trailblazer and Envoy: 185-225 degrees

-'95-'05 Audi A4 (and probably most Audis and VWs made around this time): 170-230 degrees!!!!!
A TON of these (especially the 1.8t) were known to blow head gaskets. Wonder why....

-Pretty much ALL Audis from around 2006 until current day have buffered safe zones programmed into things--EVEN models with "digital" gauges (on such models, the "bars" that make up the gauge will typically reach the middle point and stay there until things REALLY start to get hot (usually past 230-235 degrees!!)
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4. DELAYED/SMOOTHED OUT SWEEPING ANALOG GAUGE:

This is kind of a hybrid between #2 (actual analog gauge) and #3 (buffered "safe zone" analog gauge).

Basically, you have an accurate analog gauge. From COLD until warmed up, what you see is what you have. From there on, any SMALL variance in engine temperature is typically not made apparent on the gauge. Anything significant (I'd say anything over like 5-10 degrees) DOES show, albeit there might be a very slight delay before it does, as the computer wants to make sure it's actually heading that way (and isn't gonna correct itself first). Slight and quick ups and downs are not "reported" to the gauge. This prevents the owner/driver from excessive worrying when they see normal fluctuations (which themselves are indicative of a vehicle with a perfectly healthy cooling system, but most people don't understand this).

This type of system is generally every bit as accurate as the #2 (actual analog system), only sometimes leaving you 2-3 seconds behind after something happens. It still shows significant increases in temperature (anything over 5-10 degrees) AS they happen, unlike "safe zone" systems. It merely gives the "look" of a more stable cooling system, but really that's just an illusion-your engine is still going up and down and up and down in temperature, just like everyone else 's (you're just not seeing movement for 1-2-3 degree changes, as these don't matter until things start getting extremely hot, and at that point these gauges show it all).

EXAMPLES OF VEHICLES WITH THIS SYSTEM:

-2nd Generation Dodge Ram (1994-2001 Ram 1500; 1994-2002 Ram 2500/3500)

-2nd Generation Dodge Dakota and 1st Generation Dodge Durango

-3rd Generation Dodge Ram

-4th Generation Dodge Ram with analog gauges

-5th Generation Dodge Ram with analog gauges

-2nd Generation Dodge Durango

-'07-'09 Chrysler Aspen

-3rd Generation Dodge Durango

-Most Grand Cherokees

-2020 and up Ford Mustang

-2020 and up Mercedes (even models with "digital" gauges)

5. REAL-TIME (DIGITAL) GAUGES:

These are self-explanatory. Digital readouts made possible by the engine computer. Pretty damn accurate. Basically, any late-model vehicle with a digital readout that gives you temperature numbers in actual numbers (IE: 183 DEGREES), very nice.

A lot of late model vehicles use this kind of system. As far as I know, they're mostly accurate. But if the rest of this article tells us anything, it's that automakers CANNOT be trusted, and they pretty much only look out for themselves. That being said, it wouldn't surprise me to learn that even "real time"/"digital" readings aren't being intentionally skewed by these pricks! I mean, I've owned a couple vehicles with digital readouts (latest being a 2012 Ram 2500), and have found them to have PRECISELY accurate readings. But I haven't owned anything newer than the 2012 (and that Ram is already 15 model years old!).

2016-2024 Chargers, Challengers, Chrysler 300s all have VERY accurate, real-time digital gauges. I would assume the rest of the Mopar lineup was the same during this era.

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If we take anything from this writeup, I really hope it's:

1. KNOW your gauges! Know which one(s) your vehicle has. This should be pretty darn easy to figure out. I wouldn't trust a Google search and for sure DO NOT trust "AI". As far as highly specific, technical automotive stuff like this, neither will give you anything even remotely close to accurate. You just have to THINK; there are enough clues here and there's enough information to enable pretty much anyone to figure out what type of gauge they have. And if you aren't sure, "like" this post, follow this page and post a comment, and I will look into your specific year/make/model and let you know what I'm able to find out about it.

2. Keep your cooling system in TOP order! It's hot as f**k outside (for those of you who don't appreciate my cursing, I don't know what the f**k to tell you-- it IS HOT. AS. F**K!!).

3. Pay attention to whatever gauges you have. Engine oil pressure is another FUN one; I'll do a writeup on engine oil pressure gauges in the near future. If you thought engine coolant temperature/engine temperature gauges were a startling topic, just wait....

4. If you answered #1 and your vehicle is one that has a "buffered safe zone" (where your gauge doesn't move from the middle until it's literally TOO late), ASK YOURSELF: "Do I really want a car that lies to me?"

If your answer was "Idiot/Dummy light only", ask yourself: "Can I afford a new engine when that light comes on?

If you decided you couldn't afford it, would rather not chance anything like that happening (and you're driving one of those older American luxury cars), just let me know, and I'll at least give you like $100 for it. No more worries!

Anyway, I hope this was (at the very least) somewhat informative. Be careful out there--its getting HOT!

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