Exhaust System

When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to avoid possible overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

Check complete exhaust system and nearby body areas for broken, damaged, missing or mis-positioned parts, open seams, holes, loose connections, or other deterioration which could permit exhaust fumes to seep into the passenger compartment. Dust or water in the passenger compartment may be an indication of a problem in one of these areas. Any damage should be corrected immediately.

Annoying 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 the rear.

Periodic maintenance of the exhaust system is not required. When the vehicle is raised for service, check the general condition of the three way catalytic converter, pipes, mufflers, and heat shields. The steel for the exhaust system is resistant to corrosion by exhaust gases, but rapidly shows surface corrosion on the outside. This surface corrosion is not a cause for replacement.

The installation of exhaust system supports is very important, since improperly installed supports can cause annoying vibrations which are difficult to diagnose.

Exhaust system performance complaints, such as excessive back pressure, are noticeable by their effect on engine performance. Other faulty vehicle components, such as emission control devices, have similar effects on engine performance and may be characterized by the same symptoms or complaints.