For 1990-2009 cars only
Exhaust Hanger Rattle
Symptom:
Rattle from the underside of the vehicle.
Possible Cause:
The slots on the exhaust hangers increase in size over time.
Diagnosis:
Visual inspection for excessive gap in exhaust hanger where exhaust system blade is inserted.
Corrective Action:
Replace hanger(s).
Exhaust Pipe Rattle
Symptom:
Underbody rattle.
Possible Cause:
The exhaust system intermediate pipe is hitting the cross brace.
Diagnosis:
Look for witness marks on the pipe and cross brace. Minimum clearance between the pipe and the brace should be:
| • | For the 3800 V6 the specification is 19.0 mm (0.748 in) |
| • | For the 5.7L V8 the specification is 14.0 mm (0.551 in) |
Corrective Action:
| • | Reposition exhaust system to provide minimum clearance using the above specifications. |
| • | Loosen the slip joint, converter bracket hanger and take down pipe to manifold. |
| • | Raise exhaust system with a single post jack. |
| • | Retighten the system starting with the converter bracket, then tighten the take downs at the manifolds, lastly tighten the pipe clamp. |
Rear Suspension Clunk
Symptom:
A clunk is heard in the rear of the vehicle.
Possible Cause:
| • | Spring isolator is mispositioned. |
| • | A rear suspension component is not tighten to specification. |
Diagnosis:
| • | Visually inspect the isolator position on top of the spring. The spring tail end should be pointed forward. |
| • | Check all rear suspension attachments for proper torque. |
Corrective Action:
Tighten all bolts, nuts to specifications.
