Symptom Chart

SYMPTOM CHART

Condition	Possible Causes	Action
Low oil pressure	Inaccurate gauge reading	INSTALL a new gauge.
	Low oil level	ADJUST the oil level.
	Oil dilution (fuel)	INSPECT the fuel injector O-rings.
	Stuck open oil pressure regulator	INSTALL a new oil pressure regulator.
	Scored/damaged oil pump	REMOVE the oil pump and inspect.
	Damaged or misaligned oil filter drain back valve in the oil filter housing	INSTALL a new oil filter drain back valve.
	Rear main gallery plug	REMOVE the transmission/flywheel and inspect.
	Broken or damaged piston cooling jets	REMOVE the oil pan and inspect.
	Front cover gasket leaks	REMOVE the front cover and inspect the gasket.
	Missing gallery plugs	INSPECT for missing plugs.
	Missing bearing shell(s)	REMOVE the crankshaft and inspect.
	Restriction in the pickup tube or oil pan	REMOVE the oil pan and inspect.