Kochs Diesel Repair

04/01/2026

We will be pulling the sleeper off making this one a day cab and removing one fuel tank to allow for a hydraulic tank and a Lift axle later on. We should have it off today

01/25/2026

ICE anyone No thats not Ice that is The famous DEF Diesel Exhaust fluid the stuff they say is so great for the environment and helps your trucks exhaust run cleaner wich it does until it doesn't this is what happens when it develops a leak and its High in urea wich smells like horse p**s. We will be fixing this one first thing Monday morning. Give us a call if you have any def needs

01/25/2026

So l dont normally feel the need to do this but Maybe I can save someones engine from truck stop talk and maybe educate some of you. That may be causing damage to your Diesel engine because you heard it may have worked on one engine doesn't mean its good for your engine Im talking about is Injector trim codes. So what are injector trim codes? Injector trim codes are electronic signals/codes used to fine tune your injectors because not all Injectors are exactly the same they need fine tuning to get each cylinder to hit equally the same. So they use trim codes to level out the spray if one injector was spraying too much it will have a lower # and if it wasn't spraying enough it would have a larger #.
Now not every engine has trim codes but when you get a set of injectors it will either come with a trim code on the injector or it will come with a file or CD to program the injectors. Now not programing it will not damage anything but may cause it to run a little rough but when you start adding what's called a hot trim codes to a set of injectors it can cause one or more cylinders to get more fuel than the others causing you to wipe a cylinder especially if they are not a flow matched set of injectors. Now adding a hot code to a flow matched set may increase your horsepower a little but its not recommended If you want more power add a bigger injectors or a bigger turbo or even the heart of the engine a bigger cam. But to say there's a magic set of trim codes that will get you 600hp is truck stop talk

But what Im getting at is just because one set of Hot trim codes was used on one engine and it ran good doesn't mean yours won't blow up now Im not hear to tell you what to do after all its your truck and in my benefit if or when things break but I dont like to see people blow up there engines because of truck stop talk or it worked on there buddies truck or they know someone who went to school for nine months they know what there doing just fair warning

But hey what I know Ive only been doing this for 25years Now you can either choose to ignore this and maybe your engine won't blow up but dont say I didnt warn ya stay safe and thanks to all truck drivers for what you do.

06/29/2025

I love being The Diesel mechanic but Helping people is what I really love to do. Thank you to all my customers that trust me with there vehicles and Thanks for all the kind words

04/29/2025

Heavy duty Diesel Electric diagnostics available .
Kochs Diesel Repair We got all the proper tools to get your Semi truck running right. Give us a call
Computer Diagnostics $150.00 per hook up
Hourly Rate of $150.00 per hr

03/17/2025

Got to work on this old Gem today putting a clutch in it. You can see where it snapped the intermediate plate.

12/20/2024

Now able to Diagnose your semi Truck with
Snap on's Pro link Edge

12/17/2024

If your needing some work done on your Semi truck or trailer over the Holiday season Give me a call before it gets too busy I'll do my best to fit everyone in. Hope everyone has a wonderful Christmas and a Happy new year Drive safe drivers

05/02/2024

Heres some pictures of Todays project 1995 Peterbilt suspension bushings and removing fifth wheel plate to remove rust scale that was causing the frame to bend

07/14/2023

Heres a Flash back to a year ago

Check out Jesse Koch's video.

06/09/2023

Got the sign up

05/07/2023

Made a new sign with a turbo wing off of a semi I'll be putting it up on the shop soon