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DI01-14 CHANGED BY EFFECTIVE DATE AFFECTED VIN ENGINE ASSEMBLY DI ENG SM - 2004.4 Probable Cause • Inadequate valve clearance • Abrasion of valve stem or guide. • Weak valve spring. • Abrasion of the piston, the ring • Abrasion of the connecting rod • Loosened the connecting rod • Abrasion of the crankshaft • Abrasion of the crankshaft • Loosened bearing cap bolt. • Excessive clearance of the • Low oil pressure. Correction • Adjust the valve clearance. • Replace the valve stem or the • Replace the spring. • Boring the cylinder or replace • Replace the bearing. • Tighten to the specified torque • Replace the bearing. • Grind or replace the crankshaft • Tighten to the specified torque. • Adjust or replace. • Refer to “Low Oil Pressure” in Condition GENERAL DIAGNOSIS (Cont’d) Valve Noise Engine Noise Piston, Ring, Connecting Rod Crankshaft |