Engine Block Cleaning and Inspection: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required
- J 8087 Cylinder Bore Gage
- J 42385-100 Thread Repair Kit
- Clean the following areas:CAUTION: 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 .
WARNING: Wear safety glasses in order to avoid eye damage. - 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.
- The engine block in the solvent, to remove all sludge, dirt, or debris
- 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
Refer to Replacing Engine Gaskets .
- The oil galleries for restrictions
- All threaded bolt holes for damage
- Measure the following areas:
- The cylinder bores for taper
- The cylinder bores for excessive ring ridge at the top of the cylinder