Exhaust Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Inspecting Exhaust Manifold

Courtesy of GENERAL MOTORS CORP.

Clean the exhaust manifold.
Inspect the exhaust manifold for cracks or damage.
Inspect the exhaust manifold threads and studs (if necessary).

Fig 2: Checking Exhaust Manifold Mating Surface For Flatness

Courtesy of GENERAL MOTORS CORP.

Check the exhaust manifold mating surface for flatness. Use a straight edge and a feeler gage.
Replace the exhaust manifold if necessary.