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6 – 26 TROUBLESHOOTING
4. Slapping Noise Checkpoint Trouble Cause Countermeasure
Valve clearance Valve clearance improperly adjusted Adjust the valve clearance Damaged rocker arm Replace the rocker arm Rocker arm Loose flywheel bolts Retighten the flywheel bolts Flywheel Worn or damaged crankshaft and/or thrust bearings Replace the crankshaft and/or the thrust bearings Crankshaft and thrust bearings Worn or damaged crankshaft and/or connecting rod bearings Replace the crankshaft and/or the connecting rod bearings Worn or damaged connecting rod bushing and piston pin Replace the connecting rod bushing and/or the piston pin Piston and cylinder liner Worn or damaged piston and cylinder liner Foreign material in the cylinder Replace the piston and the cylinder liner OK OK OK OK NG NG NG NG NG NG NG Crankshaft and connecting rod bearings OK Connecting rod bushing and piston pin OK |