1 page 1 ENGINE 3-1-11 Models J08C-TP and J08C-TR Symptom Possible cause Remedy/Prevention Unusual engine noise Wear of piston pin boss or piston pin ............ Replace piston and/or piston pin Seized, damaged, or worn piston pin ........... Replace piston pin bushing. Worn pistons or cylinder liners ...................... Replace piston or cylinder liner Damaged or seized piston ............................ Replace piston and cylinder liner Foreign matter on top surface of the piston .. Remove foreign matter and repair or replace piston, cylinder liner, and/or cylinder head Incorrect valve clearance ..............................
Adjust valve clearance Valve cotter out of place................................ Replace valve cotter Seized valve stem ......................................... Replace valve and valve guide Broken valve ................................................. Replace valve Damaged rocker arm support ....................... Replace rocker arm support ...................................... Replace valve spring Insufficient lubricating oil ............................... Add oil Excessive or insufficient tightening of ........... Retighten to specified torque Pits and scratches on bearing surface .......... Replace bearing and crankshaft Oil film formed on back of bearing ................
Replace bearing Improper installation of bearing .................... Replace bearing Reduction of spread dimension of bearing ... Replace bearing Distorted bearing housing ............................. Replace or correct bearing housing Excessive oil clearance................................. Replace bearing Piston