12
12-11
Symptoms
Engine is difficult to start
Overheating
Low oil pressure
Excessive oil consumption (oil leakage)
Reference Gr
Possible causes
Oil cooler
Incorrectly mounted element O O O
Defective gasket O O O
Defective O-ring O O O
Clogged element O O
Damaged element O O O
Weakened bypass valve spring O
Oil pump
Malfunctioning oil pump O O
Interference between oil pump gear and oil pump case
and/or cover
OO
Incorrectly connected oil pipe O O
Clogged oil strainer O O
Weakened relief valve spring O
Oil filter
Incorrect installation O
Clogged element O O
Defective O-ring O
Front cover
Defective front oil seal O
Gr11
Incorrectly mounted front cover O
Flywheel housing
Defective rear oil seal O
Incorrectly mounted flywheel housing O
Weakened regulator valve spring O
Defective piston cooling oil jet(s) O O
Oil working its way up into combustion chamber(s) through piston rings O
Gr11
Oil working its way down into combustion chamber(s) through valves O
Too high oil viscosity O
Poor oil quality O
Deterioration of oil O
Excess of oil O
Fuel mixed with oil O
TROUBLESHOOTING
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