Toyota MR2 1988 Repair Manual page 347

LU-2
LUBRICATION SYSTEM -Troubleshooting
TROUBLESHOOTING
Problem Possible cause Remedy Page
Oil leakage Cylinder head, cylinder block or oil pump
Repair as necessary
body damaged or cracked
Oil seal faulty Replace oil seal LU-9 or
EM-94
Gasket faulty Replace gasket
'
Low oil pressure Oil leakage Repair as necessary
Relief valve faulty
Repair relief valve LU-7, 13
Oil pump faulty Repair oil pump LU-5
Poor quality engine oil
Replace engine oil
LU-4
Crankshaft bearing faulty Replace bearing EM-66
Connecting rod bearing faulty Replace bearing
EM-66
Oil filter clogged Replace oil filter LU-4
High oil pressure Relief valve faulty Repair relief valve LU-7, 13