Isuzu A-4BG1 Workshop Manual page 182

13-14
TROUBLESHOOTING
~~
EXCESSIVE OIL CONSUMPTION
t
Checkpoint Trouble Cause
Remedy
Engine oil
NG Engine oil unsuitable
Too much engine oil
NG Replace the engine oil
Correct the engine oil volume
,
I
b
J
OK I
Oil seal and gasket
OK
NG
-I
Oil leakage from the oil seal
NG
H
Replace the oil seal and/or the
and/or the gasket gasket
Air breather
NG
Clogged air breather
NG
Clean the air breather
c
I
1
Met and exhaust
valves NG
Defective valve seals
Worn valve stems and valve
NG Replace the valve seals, the
Valve seats
guides
valves, and the valve guides
.
c-
I
OK 1
Piston rings
OK
Piston rings worn, broken or
improperly installed
NG
H
Replace the piston rings or
properly install
Cylinder liners
NG Cylinder lines scored or NG
worn
Replace the cylinder liners
b