Exhaust Manifold Clean and Inspect

CAUTION: Do not reuse the exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a NEW gasket. A improperly installed gasket or leaking exhaust system may affect OBD II system performance.

1. Clean the exhaust manifold in solvent.
2. Dry the exhaust manifold with compressed air.
3. Inspect the exhaust manifold gasket sealing surfaces for damage.
4. Use a straight edge and a feeler gage and measure the exhaust manifold-to-cylinder head sealing surface for warpage. Exhaust manifold flanges with warpage in excess of 0.254 mm (0.010 inches), must be replaced.