Piston Inspection
Courtesy of GENERAL MOTORS CORP.
- Inspect the connecting rod for bending or twisting. If the connecting rod is bent or twisted, replace the connecting rod.
- Inspect the connecting rod bearings.
- Inspect the connecting rod lower end for wear.
- Inspect the connecting rod upper end for scoring.
- Inspect the crankshaft rod bearing journal for wear. Refer to Engine Mechanical Specifications .
- Inspect the piston for scoring, cracks, and wear.
- Inspect the piston for taper using a micrometer.
Courtesy of GENERAL MOTORS CORP.
- Inspect the piston for fit to the connecting rod.
Courtesy of GENERAL MOTORS CORP.
- Inspect the engine block deck surface for flatness using a straight edge and a feeler gage. Refer to Engine Mechanical Specifications .
- Inspect the bearing bore for concentricity and alignment using a bore gauge. Refer to Engine Mechanical Specifications . If the bearing bore is beyond specifications, replace the engine block.
- Inspect the engine block cylinder bore for wear, runout, ridging and taper using a bore gage. Refer to Engine Mechanical Specifications .
- Inspect the engine block cylinder bore for glazing.