What an Inframe Kit Includes
An inframe overhaul kit contains everything needed to rebuild the engine without removing it from the chassis: pistons, rings, cylinder liners, wrist pins, gaskets and seals, and main/rod bearings. Inframe kits are the standard choice for trucks and gensets where pulling the engine is expensive.
What a Full Overhaul Kit Includes
A complete engine overhaul kit adds the parts an inframe kit misses: camshaft bushings, thrust washers, valve train components, and sometimes oil pump parts. Out-of-frame overhauls also let you machine the block and crank.
How to Choose
If your engine has good oil pressure and no block damage, an inframe kit usually costs 30-40% less in labor. If the block needs machining or the engine has high hours on the valve train, go full overhaul. Send us your engine serial number and we will confirm the right kit for Cummins, Weichai, Yuchai or Baudouin engines.
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