For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | When cold and after a warmup, check for heat shields that contact the exhaust pipes. Are the heat shields or the exhaust pipes loose? | -- | Go to Step 2 | Go to Step 3
2 | Tighten the heat shield fasteners to the value given. If necessary, align the exhaust system. Is there still exhaust noise? | 2 N·m (18 lb in) | Go to Step 3 | System OK
3 | Check for leaks at the manifold or the pipe connections. Are there leaks? | -- | Go to Step 4 | Go to Step 5
4 | Tighten the leaking connections according to specifications. Refer to Fastener Tightening Specifications . Is there still exhaust noise? | -- | Go to Step 5 | System OK
5 | Inspect the muffler. Is the muffler burned or blown out? | -- | Go to Step 6 | Go to Step 7
6 | Replace the muffler. Is there still exhaust noise? | -- | Go to Step 7 | System OK
7 | Look for a burned or rusted exhaust pipe. Is the exhaust pipe burned or rusted? | -- | Go to Step 8 | Go to Step 9
8 | Replace the exhaust pipe. Tighten the exhaust crossover pipe nuts to the value given. Is there still exhaust noise? | 35 N·m (26 lb ft) | Go to Step 9 | System OK
9 | Check for a leak at the exhaust crossover pipe at the manifold flange. Is there a leak? | -- | Go to Step 10 | Go to Step 11
10 | Repair the leak. Is there still exhaust noise? | -- | Go to Step 11 | System OK
11 | Check for a cracked or broken manifold. Is the manifold cracked or broken? | -- | Go to Step 12 | Go to Step 13
12 | Replace the manifold. Refer to Exhaust Manifold Replacement in Engine Mechanical. Is there still exhaust noise? | -- | Go to Step 13 | System OK
13 | Check for a leak between the manifold and the cylinder head. Is there a leak? | -- | Go to Step 14 | --
14 | Tighten the manifold-to-cylinder head fasteners to specifications. Is there still exhaust noise? | -- | -- | System OK