Engine Diagnostics & Repair
Expert semi truck and heavy duty engine diagnostics & repair. We use advanced computer diagnostic equipment to pinpoint issues fast on Freightliner, Kenworth, Peterbilt, Volvo, Mack and all major brands.
Semi Truck Engine Diagnostics & Repair in North Little Rock, AR
When your semi truck’s engine warning light comes on or your truck won’t start, every minute counts. At Legget Truck Repair, we understand that truck downtime means lost revenue, missed deliveries, and frustrated clients. Our expert diesel mechanics in North Little Rock, AR provide fast, accurate engine diagnostics and comprehensive repair services to get your commercial vehicle back on the road as quickly as possible.
Whether you’re stranded on I-30, I-40, or parked at a truck stop near Little Rock, our mobile truck repair team comes to you – fully equipped with the latest OBD-II diagnostic scanners, Cummins InSite, Detroit Diesel DDDL, Volvo PTT, Paccar ESA, and all major manufacturer diagnostic software.
What Happens When Your Semi Truck Engine Fails?
A failing engine is one of the most serious – and costly – problems a truck driver or fleet operator can face. When your diesel engine begins to malfunction, the consequences can be severe:
Immediate Safety Hazards
Engine failures can cause sudden loss of power, making your rig difficult or impossible to control safely, especially at highway speeds on I-30 or I-40. Overheating engines can lead to catastrophic failures including cracked cylinder heads, warped engine blocks, and in extreme cases, engine fires. Pulling over safely on a busy Arkansas interstate is dangerous for both the driver and other motorists.
Financial Impact on Your Business
For owner-operators and fleet managers, engine downtime is extremely costly. Every hour your truck sits idle means lost revenue – on average, commercial trucks generate $1,500-$3,000 per day when operating. A delayed engine repair can cascade into missed loads, chargebacks, damaged business relationships, and potential breach of contract with shippers and brokers.
Why Prompt Engine Diagnostics Matter
Many serious engine problems start with minor warning signs that are easy to ignore. What begins as a small coolant leak or a single misfiring cylinder can quickly escalate to a complete engine failure if left unaddressed. Regular diagnostics and prompt repair can save thousands of dollars compared to a full engine rebuild or replacement.
Our Engine Diagnostic & Repair Services
Our certified diesel mechanics are trained on all major engine platforms including Cummins ISX, ISB, ISC, X15, Detroit Diesel DD13, DD15, DD16, PACCAR MX-11, MX-13, Caterpillar C10, C12, C13, C15, Volvo D11, D13, D16, Mack MP7, MP8, Navistar Maxxforce, and all other commercial diesel engines.
Complete Engine Diagnostic Services Include:
- Computer-based fault code reading and clearing
- Compression testing and cylinder leak-down testing
- Fuel system pressure testing and injector balance testing
- Turbocharger inspection and pressure testing
- EGR system diagnostics and cleaning
- DPF (Diesel Particulate Filter) diagnostics and cleaning
- SCR/DEF system diagnostics and repair
- Cooling system pressure testing
- Oil analysis and consultation
- Exhaust system inspection
Engine Repair Services Include:
- Cylinder head repair and replacement
- Head gasket replacement
- Fuel injector replacement
- Turbocharger repair and replacement
- EGR valve and cooler replacement
- DPF cleaning and replacement
- Timing system repair
- Engine oil and filter service
- Coolant flush and thermostat replacement
- Valve adjustment and adjustment
- Piston and ring replacement
- Engine seal and gasket replacement
Why Choose Legget Truck Repair for Engine Work?
As a family-owned business based in North Little Rock, AR, Legget Truck Repair has been providing expert diesel engine services since 2022. We have completed over 2,400 service jobs and served more than 867 businesses throughout Central Arkansas. Our reputation for honest, professional, and efficient engine repair has made us one of the most trusted diesel mechanics in the area.
We service all commercial vehicles along I-30 and I-40 – the two major interstates running through the Little Rock metro area. Our mobile trucks are fully stocked with diagnostic equipment and common replacement parts, so we can often complete repairs on the spot without requiring a tow to our shop.
Engine Diagnostics & Repair Emergency? We Respond 24/7!
Don’t stay stranded on the side of the road. Legget Truck Repair provides fast, professional mobile Engine Diagnostics & Repair service throughout North Little Rock, AR and along I-30, I-40, I-430, and I-630.
Service Areas for Engine Diagnostics & Repair
We provide professional Engine Diagnostics & Repair services throughout the greater Little Rock metropolitan area including: North Little Rock, Little Rock, Sherwood, Maumelle, Jacksonville, Conway, Shannon Hills, Hensley, Redfield, Carlisle, Benton, Bryant, Cabot, Lonoke, Beebe, Scott, Mabelvale, and all cities within 30 miles of North Little Rock, AR.
We cover all major interstates and highways including I-30, I-40, I-430, I-630, I-440, US-67, US-167, US-70, AR-10, AR-365, AR-107, AR-161 and all connecting routes throughout Central Arkansas.
Whether you’re a fleet operator, owner-operator, or commercial driver, Legget Truck Repair has the expertise and equipment to handle your Engine Diagnostics & Repair needs professionally and efficiently. Contact us today at (501) 284-6566 or submit a service request online.
Vehicle Types We Service
Our certified diesel mechanics and technicians are trained and equipped to service all types of commercial vehicles including:
- Semi Trucks (Class 8 Tractor-Trailers)
- Freightliner Cascadia, Columbia, FLD, Classic
- Kenworth T680, T880, W900, T800
- Peterbilt 389, 579, 567, 520
- Volvo VNL, VNR, VHD Series
- Mack Anthem, Pinnacle, Granite
- International LT, LoneStar, ProStar
- Western Star 4900, 5700
- All Commercial Trailers (Dry Van, Flatbed, Reefer, Step Deck, Tanker)
- Box Trucks (Medium Duty)
- RVs and Motorhomes (Class A, B, C)
- Diesel Buses and Commercial Coaches
- Heavy Equipment (Construction, Agricultural)
Note: We do NOT service pickup trucks, passenger cars, or light duty personal vehicles.
Frequently Asked Questions
Yes! Legget Truck Repair offers full mobile Engine Diagnostics & Repair service throughout Central Arkansas. We come to your location on the highway, at a truck stop, at your facility, or anywhere within our 30-mile service radius of North Little Rock, AR.
We strive to respond to all emergency calls as quickly as possible. For breakdowns along I-30, I-40, and the immediate North Little Rock/Little Rock area, we typically arrive within 45-90 minutes depending on your exact location and current service demand.
We work on all major heavy duty truck brands including Freightliner, Kenworth, Peterbilt, Volvo, Mack, International/Navistar, Western Star, and more. We also service all major trailer brands, RVs, motorhomes, box trucks, and diesel buses.
We accept cash, all major credit cards (Visa, Mastercard, American Express, Discover), company checks, Zelle, Venmo, and fleet accounts. Contact us for fleet billing arrangements.
What Our Customers Say
Real reviews from real truck drivers and fleet operators we've helped get back on the road.
"I’m with a public school district. Our band trailer had problems with the brakes at an event in Bryant. I found Leggett Truck Repair on the internet. An actual person answered, not an automated system. They were helpful and quickly got me in touch with the mobile tech. Billy, the mobile tech was very accommodating, professional and knowledgeable. He was able to get to us in about an hour and got the repair completed after a short time. We made it back home without any further issues. I felt the price was very reasonable for a Saturday afternoon. I have saved their number in case of future needs while in the Little Rock area."
"I was in distress due a breakdown calling any and every Big Rig mobile mechanic in the Little Rock Arkansas area. I had been referred to DJ because the mechanic is called said he was too far away. I called for DJ but was not able to get him immediately because he was on another call. So I got in touch with another mechanic that was on site by time DJ got back to me. Even though he didn't get the work he continued to check on me, even the next day to ascertain that the repairs were good. Now that's called character and integrity. Thanks so much."
"Legget Truck Repair provided outstanding service when my truck faced multiple issues, including a tire blowout, brake problems, an air leak, a fuel system issue, and an oil change. Their 24-hour service team was prompt, professional, and fixed everything efficiently. They kept me informed throughout and ensured my truck was fully road-ready. Now it’s running perfectly, and I couldn’t be happier with their work. Highly recommend them for any truck repair needs!"