Front Exhaust Pipe; Front Exhaust Pipe Removal; On-Vehicle Service - Isuzu NHR 4J Series Workshop Manual

6F – 4 ENGINE EXHAUST

FRONT EXHAUST PIPE

ON-VEHICLE SERVICE

Rattles and noise vibrations in the exhaust system are usually
caused by misalignment of parts. When aligning the system,
leave all bolts or nuts loose until all parts are properly aligned;
then tighten, working from front to rear.
1. Check connections for looseness or damage,
especially for exhaust gas leakage.
2. Check clamps and rubbers for weakness, cracks or
damage.
3. If any part of the converter heat shield is damaged or
dented to the extent that it contacts the catalyst, repair
or replace.
4. Check for dents or damage and for any holes or
cracks caused by corrosion.
REMOVAL
Preparation:
• Battery ground cable
1. Exhaust manifold fixing nuts.
• Remove two fixing nuts from exhaust manifold and
front pipe.
2. Front exhaust pipe mounting bracket fixing bolt and
nut.
3. Front exhaust pipe fixing bolts and nuts.
• Remove two bolts fixed from front pipe and center
pipe.
4. Front exhaust pipe.
• Take out the exhaust pipe to another side.
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