Exhaust Manifold Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying Exhaust Manifold

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not reuse exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a NEW gasket.

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

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 or damaged heat shield.

Fig 2: Measuring Exhaust Manifolds

Courtesy of GENERAL MOTORS CORP.

Use a straight edge and a feeler gage, and measure the exhaust manifolds for warpage. A warped exhaust manifold may cause a leak and may effect the vehicle performance. Exhaust manifolds that are warped must be replaced.