56. Exhaust Manifold Cleaning and Inspection

Exhaust Manifold Cleaning and Inspection





Caution: Refer to Safety Glasses Caution.

1. Clean the exhaust manifolds in cleaning solvent.
2. Dry the components with compressed air.
3. Inspect the exhaust manifolds for the following:
^ Damage to the gasket sealing surfaces (1)
^ Damage to the threaded holes (2)
^ Restrictions within exhaust passages
^ Broken or damaged exhaust manifold heat shields (3), if applicable
^ Broken or damaged exhaust manifold




4. Measure the alignment or surface flatness of the exhaust manifold flanges using a straight edge and a feeler gage. Refer to Engine Mechanical Specifications.
If the surface flatness is not within the specifications, the exhaust manifold is warped and must be replaced.