Engine Block Clean and Inspect

Engine Block Cleaning and Inspection

Tools Required
- J8087 Cylinder Bore Gage
- J42385-100 Thread Repair Kit







1. Clean the following areas:

Notice: Do not use a caustic solution to clean the aluminum engine block.

Important: When cleaning the engine block in a thermal type oven, do not exceed 450°F (232°C).
The engine block in the solvent, to remove all sludge, dirt, or debris

Caution: Refer to Safety Glasses Caution in Service Precautions.
Safety Glasses Caution


- Dry the block with compressed air.
- The gasket surfaces
- The coolant passages
- The oil galleries
- The main bearing caps
- The engine block cylinder head bolt holes for threadlocking material

Thread repair driver tool J42385-107 may be used to clean the threads of old threadlocking material.


2. Inspect the following areas:
- The cylinder walls for excessive scratches, gouging, or ring ridge
- The cylinder bores for excessive ring ridge at the top of the cylinder
- The coolant jacket for cracks
- The valve lifter bores for excessive scoring or wear
- The crankshaft bearing webs for cracks
- The gasket sealing surfaces for excessive scratches or gouging
- The oil galleries for restrictions
- All threaded bolt holes for damage

3. Measure the following areas:
- The cylinder bores for taper
- The cylinder bores for excessive ring ridge at the top of the cylinder