Isuzu A-4BG1 Workshop Manual page 185

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v.
TRfIl.U.sLESHOOTlNG
12-17
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WHITE EXHAUST SMOKE
Checkpoint
Trouble Cause
Remedy
Fuel
NG
Water particles in the fuel
OK I
4
NG
Replace the fuel
*
Fuel injection timing
NG
Delayed fuel injection timing
NG
Adjust the fuel injection timing
,
4 1
I
OK
Blown out cylinder head gasket
Compression pressure
NG
Worn cylinder liner
1 Piston ring sticking or broken
NG
Replace the related parts
Improper seating between the
valve and the valve seat
i
OK
1
*
1
Turbocharger
NG
Defective turbocharger
NG
Replace the turbocharger
OK 1
r
c
inlet and exhaust valves
Valve seals
NG
Defective valve seals
L
A Worn valves stems and valve
1' NG
Replace the valve seals, the
guides
valves, and the valve guides
. -
J c
I
OK I
I
.
Piston rings
NG Piston rings worn, broken or
improperly installed
NG
Replace the piston rings or
properly install
, .
1
I
I
I
OK
i
r
-4
r
9
Cylinder liners
NG Cylinder lines scored or
NG
' worn
Replace the cylinder liners
1 4
4