Piston And Connecting Rod - Inspection

INSPECTION





1. Wipe the inserts (1) clean.
2. Inspect the inserts for abnormal wear patterns, scoring, grooving, fatigue, pitting and for metal or other foreign material imbedded in the lining.
3. Inspect the back of the inserts for fractures, scrapes, or irregular wear patterns.
4. Inspect the insert locking tabs for damage.
5. Replace any bearing that shows abnormal wear Procedures





6. Inspect the connecting rod bearing bores for signs of scoring, nicks and burrs.

NOTE: Misaligned or bent connecting rods can cause abnormal wear on pistons, piston rings, cylinder walls, connecting rod bearings and crankshaft connecting rod journals. If wear patterns or damage to any of these components indicate the probability of a misaligned connecting rod, inspect it for correct rod alignment.

7. Replace misaligned, bent or twisted connecting rods.

NOTE: Connecting rods are serviced with the piston pre-assembled. The pistons are "select fit" to achieve proper oil clearance Piston And Connecting Rod - Piston Fitting







NOTE: Typical coated piston shown.

8. Inspect the piston for scoring or scraping marks in the piston skirts. Check the ring lands for cracks and/or deterioration.
9. Check the piston for taper and out of round shape.

NOTE: The coating material (1 and 2) is applied to the piston after the final piston machining process. Measuring the outside diameter of a coated piston will not provide accurate results. Therefore measuring the inside diameter of the cylinder bore with a dial Bore Gauge is MANDATORYEngine Block - Inspection .

10. Compare the measured cylinder bore diameter to the engine block cylinder bore grade marking chart Procedures Select the piston size that corresponds to the engine block markings for each cylinder to provide the proper oil clearance.

NOTE: Piston installation into the cylinder bore requires slightly more pressure than that required for non-coated pistons. The bonded coating on the piston will give the appearance of a line-to-line fit with the cylinder bore.

NOTE: The coated pistons will be serviced with the piston pin and connecting rod pre-assembled.