Engine Repairs & Rebuild
An engine problem is a fork in the road: repair, in-frame or replace. We diagnose honestly, price each path and help you pick the one that fits the truck's remaining service life, not just this month.
Mechanical & Driveline
Diesel work, from seeps to in-frames
We handle the full span of heavy engine work: oil and coolant leaks, overheating and cooling package problems, head gaskets, injectors, turbos, EGR systems, air compressors, in-frame repairs and hard-part failures on medium and heavy-duty diesel. Cummins, Detroit Diesel, Caterpillar, Paccar, International, Volvo and Mack power are all regular work in these bays.
Every major engine estimate comes with the honest version of the math: what the repair costs, what the truck is worth running, what its remaining service life looks like, and where the line is.
When replacement wins: the JASPER option
Sometimes an in-frame is right, and sometimes a remanufactured long block is the smarter spend. We install JASPER remanufactured diesel engines, backed by their nationwide, transferable parts and labor warranty. It is the option we recommend when a truck is worth keeping in service but its engine is not worth reviving.
Engine work we handle
Engine Repairs & Rebuild: scope of work
- Oil, coolant and vacuum leak repair
- Overheating and cooling system diagnosis
- Head gaskets, timing components and seals
- Diesel injectors, turbos and EGR
- In-frame and major mechanical repair
- JASPER remanufactured engine installation
Questions we hear
Straight answers
Repair, rebuild or replace: how do you decide?
Blowby and compression readings, oil analysis where useful, the failure itself, and the truck's value, mileage and duty cycle. We put the options side by side with prices and let you decide with the full picture.
Is a remanufactured engine as good as new?
A JASPER remanufactured unit is built to meet or exceed OEM tolerances and carries a nationwide parts and labor warranty. For most working trucks it is the strongest value on the board.
My truck is overheating. Can I drive it in?
Please do not. Overheating destroys engines by the mile. Stop somewhere safe, call (904) 683-6707 and we will arrange the tow.
Keep looking
Related services
JASPER Engines & Transmissions
JASPER remanufactured diesel engines, transmissions and differentials, backed by a nationwide transferable warranty.
See this service SVC 02Full Diagnostic Services
Factory-level diagnostics across Class 6 to Class 8: read the data, test the circuit, fix the cause.
See this service SVC 03Transmission Repairs & Rebuild
Manuals, clutches, automated manuals and Allison automatics: slipping, shift complaints, rebuilds and replacements.
See this serviceWhere we serve
Engine Repairs & Rebuild across Northeast Florida
One shop at 3190 W Beaver St in Jacksonville, with customers from every direction: