25. Engine Block Clean and Inspect

ENGINE BLOCK (UNIT REPAIR)

CLEAN AND INSPECT





1. Clean the following components:
- Use solvent to clean the engine block.
- Clean the gasket surfaces.
- Clean the coolant passages.
- Clean the oil passages.
2. Inspect the following for cracks:
- Inspect the cylinder walls for cracks.
- Replace the engine block if any cracks are evident.
- Inspect the coolant jackets for cracks.
- Replace the engine block if any cracks are evident.
- Inspect the main bearing insert cavities for cracks.
- Replace the engine block if any cracks are evident.
3. Inspect for the following in the cylinder walls:
- Inspect for gouges in the cylinder walls deeper than 0.05 mm (0.002 inch).
- Bore the cylinder if gouges are deeper than 0.05 mm (0.002 inch).
- Inspect for pitting in the cylinder wall deeper than 0.05 mm (0.002 inch).
- Bore the cylinder if pitting is deeper than 0.05 mm (0.002 inch).
- Inspect for scores is the cylinder wall deeper than 0.05 mm (0.002 inch).
- Bore the cylinder if scores are deeper than 0.05 mm (0.002 inch).





4. Use a cylinder bore gauge to measure the cylinder bore for the following conditions:
- Measure for wear.
- Measure for taper.
- Measure for runout.
- Measure for ridging.
If wear and/or taper is less than 0.05 mm (0.002 inch), cylinder must be reconditioned. Recondition the cylinders with less than 0.05 mm (0.002 inch) of wear and/or taper with a hone and fit with the appropriate size select fit piston (providing the cylinder was not fitted with the largest size select fit piston). If wear and/or taper is over 0.05 mm (0.002 inch) cylinder must be bored.