Exhaust System - Rattle/Popping Sound
TSB SB03-03-S002Exhaust/Muffler Heat Shield Rattle Popping Sound Under
Vehicle
ISSUE DATE: FEBRUARY 2003
Affected Vehicles
2003 Isuzu Ascender (US).
Service Information
Condition:
Some customers may comment on a rattle/popping sound from under the vehicle.
Possible Cause:
The separation of the muffler heat shield from the muffler may cause a rattle under the vehicle.
Correction:
Install two heat shield retaining straps, P/N 8-15164-621-0, to the muffler and muffler heat shield. Follow the service procedure below to correct this concern.
Service Procedure
1. Raise and support the vehicle. Refer to Lifting and Jacking section of the Workshop Manual.
2. Install a retaining strap, P/N 8-15164-621-0, around the front of the muffler and muffler heat shield (see figure 1).
3. Pull the retaining strap tight with one hand and tighten the Allen head screw with the other hand.
4. Tighten the Allen head screw on the retaining strap to 13.5 N.m (119 lb in).
5. Repeat steps 2 and 3 on the rear of the muffler.
6. Lower the vehicle.
Parts Information
Warranty Claim Information
Use the new labor operations shown.
Labor Time includes administrative time allowance.
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