29. Engine Block Cleaning and Inspection

ENGINE BLOCK CLEANING AND INSPECTION

TOOLS REQUIRED
- J 8087 Cylinder Bore Gage
- J 42385-100 Thread Repair Kit




1. Clean the following areas:

NOTE: 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
Refer to Cleanliness and Care.

CAUTION: Refer to Safety Glasses Caution in Service Precautions.

- Dry the block with compressed air.
- The gasket surfaces
Refer to Replacing Engine Gaskets.
- The coolant passages
- The oil galleries
- The main bearing caps
- The engine block cylinder head bolt holes for threadlocking material
Thread repair driver tool J 42385-107 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