Exhaust Manifold Cleaning and Inspection
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
Clean the exhaust manifold (1) and heat shields (2) in solvent.
- Dry the exhaust manifold with compressed air.
- Inspect the exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging.
- Inspect for a loose, damaged, or cracked heat shields (2).
- Inspect the heat shield bolts (3) for damaged threads.
Use a straight edge and a feeler gauge and measure the exhaust manifold cylinder head deck for warpage.
An exhaust manifold deck with warpage in excess of 0.25 mm (0.01 in) within the 2 front or 2 rear runners or 0.5 mm (0.02 in) overall, may cause an exhaust leak and may affect OBD II system performance. Exhaust manifolds not within specifications must be replaced.
WARNING:
Refer to Safety Glasses Warning .