- Clean the exhaust manifolds
in solvent.
Caution: Wear safety glasses in order to avoid eye damage.
- Dry the
components with compressed air.
- Inspect the exhaust manifolds for the following:
| • | Damage to the gasket sealing surfaces |
| • | Damaged exhaust gas recirculation (EGR) pipe mounting studs (if
applicable) |
| • | Damage to the exhaust manifold studs |
| • | Broken or damaged heat shields |
| • | Cracks in the exhaust manifold |
| • | Restrictions within the exhaust passages |
- Measure the alignment
or surface flatness of the exhaust manifold flanges, using a straight edge
and a feeler gage. Exhaust manifold surface flatness must not exceed 0.254 mm (0.01 in).
- If the surface flatness is not within specifications, the exhaust
manifold is warped and must be replaced.
