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Condition Probably cause Corrective action
EXCESSIVE OIL
CONSUMPTION
Oil leakage Loose oil drain plug. Tighten it.
Loose or damaged oil pan gasket. Renew gasket or tighten it.
Loose or damaged chain cover gasket. Renew gasket or tighten it.
Worn oil seal in front or rear of crankshaft. Replace oil seal.
Loose or damaged rocker cover gasket. Renew gasket or tighten it to specification.
Improper tightening of oil filter. Renew gasket and tighten it with the proper
torque.
Loose or damaged oil pressure switch. Replace oil pressure switch or tighten it.
Excessive oil Cylinder and piston wear. Overhaul cylinder and renew piston.
consumption
Improper location of piston ring gap or reversely Remount piston rings.
assembled piston ring.
Damaged piston rings. Replace rings.
Repair or renew piston and cylinder.
Worn piston ring groove and ring. Replace piston and piston ring.
Fatigue of valve oil seal lip. Replace seal lip.
Worn valve stem. Replace valve or guide.
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