62. Exhaust Manifold Clean and Inspect - With RPO K19

1. Clean the exhaust manifolds in solvent.

Caution: Wear safety glasses in order to avoid eye damage.

2. Dry the components with compressed air.





3. Inspect the exhaust manifolds for the following:
^ Damage to the gasket sealing surfaces
^ Loose or damaged EGR pipe fitting (if applicable)
^ Damage to the take down studs
^ Restrictions within the exhaust passages
^ Broken or damaged heat shields (if applicable)





4. Inspect for restrictions within the AIR system passages.
5. Inspect for damaged to the threads of AIR inlet pipe opening.





6. Measure the alignment or surface flatness of the exhaust manifold flanges, using a straight edge and a feeler gauge. Exhaust manifold surface flatness must not exceed 0.254 mm (0.01 inch).
7. If the surface flatness is not within specifications, the exhaust manifold is warped and must be replaced.