Engine Block Clean and Inspect

1. Boil the cylinder block in caustic solution.
2. Flush the cylinder block with clean water or steam.
3. Clean the following areas:
^ All gasket surfaces.
^ Cylinder bores, remove excessive cylinder ring ridge as required.
^ Main bearing caps.
^ Oil galleries, remove all sludge or restrictions.
^ Scale deposits from the coolant passages.
^ All dirt or debris from threaded bolt holes.

4. Dry the block with compressed air.

CAUTION: Wear safety glasses in order to avoid eye damage.

5. Lubricate the cylinder bores with clean engine oil to prevent rusting.
6. Inspect the engine block for the following conditions:
^ Gasket surfaces for deep gouges or other damage
^ Crankshaft bearing bores for wear
- The surfaces where the crankshaft bearings contact the crankshaft bearing bore must be smooth.
- All crankshaft bearing bores must be round and uniform in Inside Diameter (ID) at all the bearing supports.
- If a crankshaft bearing cap is damaged and requires replacement, refer to Crankshaft and Bearings Clean and Inspect.
^ Camshaft bearing bores for wear or damage
^ Valve lifter bores for scuffing or wear
^ Engine block for cracks or other damage
^ Cylinder walls for scoring or gouges
^ Coolant jackets for cracks
^ Crankshaft bearing webs for cracks
^ Engine mount bosses for damage
^ The oil passages for restrictions





7. Inspect the engine block cylinder head deck for flatness using a straight edge and a feeler gauge.
The surface must be flat within 0.10 mm (0.004 inch).