TROUBLESHOOTING
197
OK
OK
OK
OK
10. ABNORMAL ENGINE NOISE
1. Engine Knocking
Checkpoint Trouble Cause Countermeasure
Check to see that the engine has been thoroughly warmed up before beginning the troubleshooting procedure.
Fuel Fuel unsuitable Replace the fuel
Fuel injection timing
Fuel injection timing improperly
adjusted
Adjust the fuel injection timing
Improper injection nozzle starting
pressure and spray condition
Adjust or replace the injection
nozzle
Blown out head gasket
Broken piston ring
Replace the head gasket or the
piston ring
Compression pressure
Injection nozzle
Exhaust pipes
Loosely connected exhaust pipes
Broken exhaust pipes
Tighten the exhaust pipe
connections
Replace the exhaust pipes
Injection nozzles and/or glow
plugs
Loose injection nozzles and/or
glow plugs
Replace the washers
Tighten the injection nozzles
and/or the glow plugs
NG NG
NG NG
NG NG
NG NG
NG NG
NG NG
Continued on the next page
2. Gas Leakage Noise
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