L.I. Diesel Guys

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L.I. Diesel Guys Long Island Diesel Service & Repair. Servicing trucks, heavy equipment & more. We also service gas engines. Mobile service and repair available.

Cold weather is coming. Is your diesel ready? ❄️Swipe for your fall prep checklist 👉🔋 Test your batteries before the fir...
10/14/2026

Cold weather is coming. Is your diesel ready? ❄️

Swipe for your fall prep checklist 👉

🔋 Test your batteries before the first cold snap
⛽ Service the fuel filter and water separator
🌡️ Check glow plugs and coolant
🛢️ Fresh oil for winter operating temps
✅ Get a full inspection before you need it

Beat the November rush. Get it done now. 🔧

📞 631-823-1000

10/13/2026

No cutting corners. No guesswork. Just diesel done right. 🔧

Real work. Real results. This is a day at LI Diesel Guys.

📞 631-823-1000
🌐 lidieselguys.com

Engineered for endurance. 💪We use OE industrial-grade parts and advanced diagnostics, so every repair meets a strict per...
10/10/2026

Engineered for endurance. 💪

We use OE industrial-grade parts and advanced diagnostics, so every repair meets a strict performance standard.

Fixed right the first time. Built to last.

📞 631-823-1000
🌐 lidieselguys.com

10/08/2026

Big trucks. Big equipment. Big jobs. We've got it. 🚜

Full-service heavy-duty repair for trucks and equipment, backed by industrial-grade parts and advanced diagnostics.

When the machine that runs your business goes down, we get it back to work fast.

📞 631-823-1000
🌐 lidieselguys.com

Meet Mike. The owner in the shop, not just on the sign. 🔧Mike Disanti, Founder & GM.He started LI Diesel Guys in 2021 wi...
10/06/2026

Meet Mike. The owner in the shop, not just on the sign. 🔧

Mike Disanti, Founder & GM.

He started LI Diesel Guys in 2021 with one goal: make it Long Island's home for diesel expertise. With 20+ years in the trade, he built a team that treats every truck like it's their own.

Most of you have talked to him yourself. That's on purpose. 🤝

📞 631-823-1000

Three nominations worth getting behind. LI Diesel Guys has been nominated for Truck Repair Shop, Auto Repair Shop, and A...
10/03/2026

Three nominations worth getting behind. LI Diesel Guys has been nominated for Truck Repair Shop, Auto Repair Shop, and Auto Dealership Service Department in FourLeaf Best of L.I.! Thank you to the drivers and businesses who trust us to help keep them moving. We’d love your support in all three categories.

Truck Repair Shop: https://www.bestoflongisland.com/voting/ #/gallery/560912458
Auto Repair Shop: https://www.bestoflongisland.com/voting/ #/gallery/560912254
Auto Dealership Service Department: https://www.bestoflongisland.com/voting/ #/gallery/560912216

When the dreaded CP4 pump goes, where you take it matters. 💥P Port's 6.7 Power Stroke had a catastrophic CP4 failure. Tw...
10/03/2026

When the dreaded CP4 pump goes, where you take it matters. 💥

P Port's 6.7 Power Stroke had a catastrophic CP4 failure. Two Ford dealers quoted 13k to 16k. Another "fix" left him stranded on the expressway towing his fifth wheel.

Then he found us. We did the DCR pump swap and made it right.

⭐⭐⭐⭐⭐
"This is the first time I have towed with confidence. The engine is as responsive and powerful as if it were brand new. I will be a customer for life."

09/30/2026

One shop for your whole fleet. 🛠️

Ford. CAT. Bobcat. Cummins. Kubota. John Deere.

Trucks and equipment, all under one roof, all done right.

Stop juggling shops. Bring it all to us. 🚛

📞 631-823-1000
🌐 lidieselguys.com

Can't get to us? We'll come to you. 🚐In-shop or on-site, we keep you running. Our mobile service brings factory-trained ...
09/28/2026

Can't get to us? We'll come to you. 🚐

In-shop or on-site, we keep you running. Our mobile service brings factory-trained diesel techs right to your driveway, job site, or yard.

Less downtime. Less hassle. More uptime. 🔧

📞 631-823-1000

09/25/2026

Your machine has been running since spring, and cleanup season is the part that breaks things.

Now is when you find the problem. Not in November, when you are behind and everyone needs service the same week.

Mid-Isle Equipment sells the machine. L.I. Diesel Guys keeps it running. Both on 15th Street in Ronkonkoma.

Fluids, hydraulics, batteries, belts. Get it checked before you need it.

Address

7 15th Street
Ronkonkoma, NY
11779

Opening Hours

Monday 7am - 4pm
Tuesday 7am - 4pm
Wednesday 7am - 4pm
Thursday 7am - 4pm
Friday 7am - 4pm
Saturday 8am - 1pm

Telephone

+16318231000

Website

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