56. Exhaust Manifold Clean and Inspect

Exhaust Manifold Cleaning and Inspection





Caution: Refer to Safety Glasses Caution in Service Precautions.
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 Specifications.
If the surface flatness is not within the specifications, the exhaust manifold is warped and must be replaced.