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.

For a fleet, downtime is money lost. 🚛That's why we run monthly preventive maintenance programs that keep your trucks on...
10/24/2026

For a fleet, downtime is money lost. 🚛

That's why we run monthly preventive maintenance programs that keep your trucks on the road and earning, job after job.

We catch the small stuff before it becomes a breakdown. No downtime delays.

Let's set up your fleet. 🔧

📞 631-823-1000
🌐 lidieselguys.com

436,000 miles and running like new. 🔥John brought us his 2006 F250 6.0 for injectors, glow plugs, standpipes, oil and fu...
10/22/2026

436,000 miles and running like new. 🔥

John brought us his 2006 F250 6.0 for injectors, glow plugs, standpipes, oil and fuel service. In and out in three days.

⭐⭐⭐⭐⭐
"They gave me back my truck running like new. I won't let any other mechanic go into my engine but Mike and team. Where else can you get that done in three days at a reasonable price?"

That's why people stick with us. 🙌

📞 631-823-1000

Meet Giorgio. The guy connecting the bigger picture. 🔗Giorgio Guidi, COO.He brought LI Diesel Guys together with our sis...
10/20/2026

Meet Giorgio. The guy connecting the bigger picture. 🔗

Giorgio Guidi, COO.

He brought LI Diesel Guys together with our sister company, The LEARN Center, uniting expert heavy equipment repair with operator training. It's how we're built to grow in the heavy equipment world.

📞 631-823-1000

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."

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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