Check for leaks at the exhaust manifold or the exhaust pipe connections.

Are there leaks at the exhaust manifold or the exhaust pipe connections?

Go to Step 2

Go to Step 3

Tighten the flanges at the leaking connections to the correct specifications. Refer to Fastener Tightening Specifications .

Has the leakage stopped?

System OK

Go to Step 3

Check for a burned or a blown-out muffler.

Is either of the mufflers burned or blown out?

Go to Step 4

Go to Step 5

Replace the muffler. Refer to Muffler Replacement

Are there still exhaust noises?

Go to Step 5

System OK

Check the exhaust pipe at the exhaust manifold flange.

Is the flange leaking?

Go to Step 6

System OK

1. Replace the exhaust manifold as necessary. Refer to Exhaust Manifold Replacement in Engine Mechanical.
2. Tighten the manifold retaining nuts to 20 N·m (15 lb ft).

Are there still exhaust noises?

Go to Step 7

System OK

Check to see if the exhaust manifold is cracked or broken.

Is the exhaust manifold cracked or broken?

Go to Step 8

Go to Step 9

Repair or replace the exhaust manifold as necessary. Refer to Exhaust Manifold Replacement in Engine Mechanical.

Are there still exhaust noises?

Go to Step 9

System OK

Check for a leak between the exhaust manifold and the cylinder head.

Is there a leak between the exhaust manifold and the cylinder head?

Go to Step 10

System OK

Tighten the bolts between the exhaust manifold and the cylinder head to specifications. Refer to Fastener Tightening Specifications .

Are there still exhaust noises?

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System OK