57. Exhaust Manifold Clean and Inspect

Caution: Refer to Safety Glasses Caution in Service Precautions.





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 exhaust gas recirculation (EGR) pipe fitting (2) (left manifold)
- Damage to the threaded holes (3)
- Restrictions within exhaust passages
- Broken or damaged exhaust manifold heat shields (4) (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 gauge. Refer to Specifications.
If the surface flatness is not within the specifications, the exhaust manifold is warped and must be replaced.