Inspection Procedure
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the exhaust manifold for the following:
- Damage to the oxygen sensor threaded hole (1)
- Damage or restrictions within the exhaust passages (2)
- Damage to the gasket sealing surfaces (3)
- Damage to the exhaust manifold mounting holes (4)
- Inspect the exhaust manifold for the following:
- Damage or broken welds (1)
- Damage or excessive corrosion to the exhaust manifold exterior (2)
- Damage to the converter pipe gasket sealing surfaces (3)
- Damage to the converter pipe mounting holes (4)
- Repair or replace the exhaust manifold and/or components as necessary.
- Measure the alignment or surface flatness of the exhaust manifold flanges, using a straight edge and a feeler gauge. Exhaust manifold surface flatness must not exceed 0.254 mm (0.010 in).
- If the surface flatness is not within specifications, the exhaust manifold is warped and must be replaced.