55. Exhaust Manifold Cleaning and Inspection

Exhaust Manifold Cleaning and Inspection





Warning: Refer to Safety Glasses Warning (Safety Glasses Warning) .

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 (Specifications) .
If the surface flatness is not within the specifications, the exhaust manifold is warped and must be replaced.