For 1990-2009 cars

Important:

• | Do not reuse the exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a new gasket.

• | An improperly installed gasket or leaking exhaust system may effect On-Board Diagnostics (OBD) II system performance.

• | For vehicles equipped with the PUP catalytic converter, do not splash any solvent into the converter element.

1. Clean the exhaust manifold with solvent.

Caution: Refer to Safety Glasses Caution in the Preface section.

2. Dry the exhaust manifold with compressed air.
3. Inspect for a loose or damaged heat shield.
4. Clean the exhaust manifold mating surface.
5. Measure the exhaust manifold mounting face for warpage using a straight edge and a feeler gage.

Exhaust Manifold Maximum Warpage
0.10 mm (0.004 in)

6. If the warpage is greater than the maximum, replace the exhaust manifold.