Engine (Sohc) Troubleshooting - Mitsubishi 1989-1993 GALANT Service Manual

ENGINE <SOHC> - Special Tools/Troubleshooting
Tool
Symptom
Compression too low
Valve seat worn or damage
Oil pressure drop
Oil filter clogged
Oil pump gears or cover worn
Thin or diluted engine oil
Oil relief valve stuck (opened)
Excessive bearing clearance
Oil pressure too high Oil relief valve stuck (closed)
Noisy valves Incorrect lash adjuster
Thin or diluted engine oil (low oil pressure)
Valve stem or valve guide worn or damage
Connecting rod noise/ Insufficient oil supply
main bearing noise
Low oil pressure
Thin or diluted engine oil
Excessive bearing clearance
Timing belt noise
Incorrect belt tension
Excessive engine rolling Loose engine roll stopper (Front, Rear)
and vibration
Loose transaxle mount bracket
Loose engine mount bracket
Loose center member
Broken transaxle mount insulator
Broken engine mount insulator
Broken engine roll stopper insulator
Number Name
HOLDER, lash
adjuster
Tension pulley
wrench
Probable cause
Cylinder head gasket blown
Piston ring worn or damage
Piston or cylinder worn
Engine oil level too low
Oil pressure switch faulty
TSB Revision
Use
Supporting of lash adjuster to prevent it
from falling when rocker shaft assembly
removed or installed
Adjustment of timing belt tension
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 oil pressure switch
Install new filter
Replace gears and/or cover
Change engine oil to correct viscosity
Repair relief valve
Replace bearings
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 bearings
Adjust belt tension
Retighten
Replace
IS