Engine Repair, Overhaul & Conversion Services in Ronkonkoma, NY

Engine Repair, Overhaul & Conversion

Power loss, overheating, or engine knock are all red flags that you can't afford to ignore. Our heavy-duty and medium-duty engine repair, overhaul, & conversion services let you rebuild, upgrade, or convert for reliability that lasts.

Diesel Engine Repair in Ronkonkoma, NY

Whether you’re facing a failing fuel injection system, a leaking cylinder head gasket, or experiencing issues like engine knock or misfires, ignoring these symptoms can lead to catastrophic failure.

At K&M Truck Repair, we offer a full range of diesel engine repair services to diagnose and fix problems fast. From minor tune-ups to complete engine overhauls, we've got you covered. Our services include:

  • Precision engine diagnostics
  • Semi truck engine repair and cylinder work
  • Truck engine overhauls for worn or high-mileage engines
  • Conversion services for power, fuel efficiency, or compliance
  • Injector testing, valve adjustments, and timing corrections
  • Block inspections, gasket replacements, and full rebuilds

Experience the K&M Difference!

Your fleet can’t afford to sit idle, and your engine repairs shouldn’t leave you guessing. At K&M Truck Repair, we deliver dependable results, fast turnarounds, and customer-first service that puts your uptime first. Here’s how we stand apart:

Dealer-Quality Repairs: OEM-grade tools and training ensure long-lasting engine work you can count on.

Relentless Diagnostics: We dive deep into every engine issue to identify root causes, not just symptoms.

Outstanding Customer Service: We respect your schedule and keep you informed every step of the way.

Contact Us About Truck Engine Repair Now: Call 631-331-0066!

If you’re facing engine trouble or considering a rebuild, don’t wait for a full breakdown. Call 631-331-0066 to book your truck engine repair service today. Prefer texting? No worries, our expert team is available at 833-267-3752!

FAQs

What areas do you serve for heavy-duty and medium-duty engine repair?

We are located at 3045 Veterans Memorial Highway, Ronkonkoma, NY 11779, and proudly serve all of Suffolk County and parts of Nassau County.

What causes engine knock in diesel trucks?

Engine knock is often caused by poor combustion timing, low-quality fuel, carbon buildup, or worn internal components. It’s important to diagnose early before it leads to permanent damage.

What’s included in a truck engine overhaul?

A full engine overhaul may include replacing pistons, rings, liners, gaskets, and bearings, and cleaning or machining key components. It’s designed to restore original engine performance and extend its lifespan.

How can I get heavy-duty or medium-duty engine repair, overhaul & conversion?

If you're ready to restore engine performance or explore a full overhaul or conversion, call us at 631-331-0066 or text 833-267-3752. Our team will happily walk you through the process, answer your questions, and schedule a service that fits your fleet’s needs.

Repairs

Medium & Heavy-Duty Diesel Repairs

At K&M Truck Repair, we take on diesel and automotive repairs with precision and pride. From brake and suspension issues to electrical problems, drivetrain faults, and cooling system failures, our experienced mechanics get to the root of the issue fast. We don’t guess; we diagnose, repair, and stand by the quality of our work. Whether it’s a one-time fix or a recurring problem that’s been missed elsewhere, we’ve got the tools and the team to get it done right!

Reviews

Customer Testimonials

"Was looking for a new shop to work on my truck and these guys were phenomenal. Took me right in, kept me informed throughout the process and expeditiously had me back up and running. Their knowledge and workmanship is incredible. If you're looking for a great shop to bring your truck to, look no further because these are your guys,"
- Daniel

"Thank you Angel, Rich, and the crew for always doing the right thing and being there when needed.  @MorelandHose appreciates dealing with local, family-owned small businesses like yourself."

David

"My truck lights were out and Peter and Ray saved the day. Peter showed me exactly what the issue was and had me going in no time. Real honest service!!!!  I will definitely go back."

3 Brothers Family Moving

"The truck repair shop is a lifesaver for truck owners. They provide swift and skilled service, ensuring your vehicle gets back on the road in no time. A dependable choice for truck maintenance and repairs."

Kenneth

"I Highly recommend this place and people. One of the most friendly and attentive shop I’ve ever work with. Thank you Alvin for your assistance, professionalism and kindness. Thank you Peter for your skills, time, knowledge and honesty fixing my truck. You have a customer for life."

Dariusz

"This place is awesome! They got me in right away and fixed the tires on my kayak trailer. The entire staff was kind and courteous. I would highly recommend!!!"

Karen

"This company is extremely reliable! Hard workers and they go the extra mile for you. I am completely satisfied and in awe of how fast they got to me and to work. 100% recommend."

Jonathan

"Professional, friendly, and knowledgeable.  These people go above and beyond to help you fix the problem.  We had several issues with our truck (electrical, brakes, airleak).  The owner, Peter, checked out the truck and fixed it quickly!  He and his staff are extremely helpful and friendly.   These people treat you right and know their stuff!"

Lady Trucker

"Air compressor went out on my 2007 Peterbilt. Peter showed up within an hour and had me rolling again by noon next day good, honest mechanic is priceless these days I highly recommend."

Stephen

Contact & Location

Billing

Here at K&M TRUCK REPAIR, we know that any product or service that streamlines your fleet repairs saves you time and money, so we now have cbCharge available. It is a simple and free charge account that consolidates your billing through a secure online portal and provides 30-day payment terms with no interest or late fees. Your fleets repairs and maintenance are completed and billed and emailed from K&M TRUCK REPAIR. Then you get one monthly invoice from cbCharge, similar to a credit card bill.

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