Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Lubrication Engine Lubrication System Trouble in General<< Back
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ENGINE LUBRICATION SYSTEM TROUBLE IN GENERAL
9. Engine Lubrication System Trouble in General
Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.
Trouble Possible cause Corrective action
1) Oil pressure switch Cracked diaphragm or oil leakage within switch Replace.
failure Broken spring or seized contacts Replace.
Clogged oil filter Replace.
Malfunction of oil by-pass valve of oil filter Clean or replace.
Malfunction of oil relief valve of oil pump Clean or replace.
1. Warning light remains 2) Low oil pressure Clogged oil passage Clean.
on. Excessive tip clearance and side clearance of oil
pump rotor and gear
Clogged oil strainer or broken pipe Clean or replace.
Insufficient engine oil Replenish.
3) No oil pressure Broken pipe of oil strainer Replace.
Stuck oil pump rotor Replace.
1) Malfunction of combination meter Replace.
2. Warning light does
2) Poor contact of switch contact points Replace.
not go on.
3) Disconnection of wiring Repair.
1) Poor contact at terminals Repair.
2) Defective wiring harness Repair.
3. Warning light flickers
momentarily. Check for the same
3) Low oil pressure possible causes as
listed in 1. - 2).
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