Exhaust Leakage - Not OBD II. Cadillac Concours 1997

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Inspect the components. Are there any improperly installed or misaligned components? | -- | Go to Step 2 | Go to Step 3

2

1. Align the components.
2. Tighten the component connections to specifications. Refer to Fastener Tightening Specifications .

Is the exhaust system leaking and/or making excessive noise?

--

Go to Step 3

System OK

3 | Inspect the connections at the exhaust manifold and the three way + oxidation catalytic converter. Are there any loose connections at the exhaust manifold or the three way + oxidation catalytic converter? | -- | Go to Step 4 | Go to Step 5
4 | Tighten all of the fastener connections to specifications. Refer to Fastener Tightening Specifications . Is the exhaust system leaking and/or making excessive noise? | -- | Go to Step 5 | System OK
5 | Inspect the exhaust manifold. Is the exhaust manifold cracked or broken? | -- | Go to Step 6 | Go to Step 7
6 | Replace the exhaust manifold. Refer to Exhaust Manifold Replacement . Is the exhaust system leaking and/or making excessive noise? | -- | Go to Step 7 | System OK
7 | Inspect the crossover exhaust pipe. Is there leakage at the crossover exhaust pipe? | -- | Go to Step 8 | Go to Step 9
8 | Tighten the nuts and the bolts to specifications. Refer to Fastener Tightening Specifications . Is the exhaust system leaking and/or making excessive noise? | -- | Go to Step 9 | System OK
9 | Inspect the seals. Are the seals damaged or worn? | -- | Go to Step 10 | Go to Step 11
10 | Replace the seals. Is the exhaust system leaking or making excessive noise? | -- | Go to Step 11 | System OK
11 | Inspect the intermediate exhaust pipe. Is the intermediate exhaust pipe burned or rusted out? | -- | Go to Step 12 | Go to Step 13
12 | Replace the intermediate exhaust pipe. Refer to Intermediate Pipe . Is the exhaust system leaking or making excessive noise? | -- | Go to Step 13 | System OK
13 | Inspect the muffler. Is the muffler burned or rusted? | -- | Go to Step 14 | Go to Step 15
14 | Replace the muffler/tailpipe assembly. Refer to Muffler . Is the exhaust system leaking or making excessive noise? | -- | Go to Step 15 | System OK
15 | Inspect the exhaust component joints and couplings. Is there leakage at the exhaust component joints or couplings? | -- | Go to Step 16 | --

16

1. Tighten the clamps to specifications. Refer to Fastener Tightening Specifications .
2. Replace the clamps, if damaged.

Is the exhaust system leaking or making excessive noise?

--

--

System OK