Isuzu engine 4j series. Manual — part 6

SERVICE INFORMATION 00 – 23

Checkpoint

Trouble Cause

Countermeasure

Center housing oil drain passage

Restricted

Clean or replace

Continued from the previous page

NG

OK

00 – 24

SERVICE INFORMATION

3) EXCESSIVE OIL CONSUMPTION

Checkpoint

Trouble Cause

Countermeasure

Air breather

Restricted

Clean

Boost compensator

(Injection pump)

Defective

Repair or replace

Turbocharger oil seal

Leakage

Replace

Turbocharger oil drain pipe

Restricted

Clean or replace

Turbine wheel

Impact damage

Replace

Compressor wheel

Impact damage

Replace

Oil pressure

Excessive

Repair

Continued on the next page

OK

OK

OK

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG

SERVICE INFORMATION 00 – 25

Checkpoint

Trouble Cause

Countermeasure

Center housing oil drain passage

Restricted

Clean or replace

Continued from the previous page

NG

OK

00 – 26

SERVICE INFORMATION

4) EXCESSIVE TURBOCHARGER NOISE

Checkpoint

Trouble Cause

Countermeasure

Intake and exhaust

system joints

Restricted

Repair

Intake and exhaust system

gaskets

Damaged

Replace

Turbocharger rotating parts

Rough rotation

Replace

Rubbing against housing

Repair or replace

Damaged

Replace

Rubbing against housing

Repair or replace

Damaged

Replace

Continued on the next page

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG

Compressor wheel

Turbine wheel

Carbon deposits

Clean or replace

NG