Mitsubishi Eclipse 1990 Service Manual page 274

TROUBLESHOOTING
Symptom
Compression too low
Oil pressure drop
Oil pressure too high
Noisy valves
Connecting rod noise/
main bearing noise
Timing belt noise
engine
ing and vibration
ENGINE
Probable cause
Cylinder head gasket blown
Piston ring worn or damaged
Piston or cylinder worn
Valve seat worn or damaged
Engine oil level too low
Oil pressure switch faulty
Oil filter clogged
Oil pump gears or cover worn
Thin or diluted engine oil
Oil relief valve stuck (open)
Excessive bearing clearance
Oil relief valve stuck (closed)
Incorrect lash adjuster
Thin or diluted engine oil (low oil pressure)
Valve stem or valve guide worn or damaged
Insufficient oil supply
Low oil pressure
Thin or diluted engine oil
Excessive bearing clearance
Incorrect belt tension
Loose engine roll stopper (Front, Rear)
Loose transaxle mount bracket
Loose engine mount bracket
Loose center member
Broken transaxle mount insulator
Broken engine mount insulator
Broken roll stopper insulator
Revision
Troubleshooting
Remedy
Replace gasket
Replace rings
Repair or replace piston and/or cylinder
block
Repair or replace valve and/or seat ring
Check engine oil level
'Replace
Install new
Replace gears and/or cover
Change engine oil to correct viscosity
Repair relief valve
R e p l a c e b e a r i n g s
Repair relief valve
Bleed air or replace lash adjuster
Change engine oil
Replace valve and/or guide
Check engine oil level
Refer to "Oil pressure drop"
Change engine oil
Replace
Adjust belt tension
ing belt
Retighten
Retighten
Retighten
Retighten
Replace
Replace
Replace
.
pressure switch
filter
,
bearings
replace tim-