Engine Lubrication Diagnostic Table

WARNING: This page is about a different variant/trim than selected.

CONDITION	POSSIBLE CAUSES	CORRECTION
OIL LEAKS	Gaskets and O-rings Misaligned or damaged Loose fasteners, broken or porous metal parts Crankshaft rear seal Crankshaft seal flange damaged Oil pan flange cracked Front cover seal damaged/misaligned Damaged vibration damper Crankshaft rear flange microporosity	Verify condition Replace as necessary Tighten fasteners, repair or replace metal parts Replace as necessary Polish or replace crankshaft Replace oil pan Replace seal Polish or replace damper Replace crankshaft
OIL PRESSURE DROP	Low oil level Faulty oil pressure sending unit Low oil pressure Clogged oil filter Worn oil pump Thin or diluted oil Excessive bearing clearance Oil pump relief valve stuck Oil pickup tube loose or damaged Faulty or missing piston cooling jets	Check and correct oil level Replace sending unit Check pump and bearing clearance Replace oil filter Replace as necessary Change oil and filter Replace as necessary Replace oil pump Replace as necessary Replace piston cooling jets
OIL PUMPING AT RINGS; SPARK PLUGS FOULING	Worn or damaged rings Carbon in oil ring slots Incorrect ring size installed Worn valve guides Leaking intake gasket Leaking valve guide seals	Hone cylinder bores and replace rings Replace rings Replace rings Ream guides and replace valves Replace intake gaskets Replace valve guide seals