Caution: Wear safety glasses in order to avoid eye damage.
- Clean the
exhaust manifolds in cleaning solvent.
- Dry the components with compressed air.
- 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 |
- Measure the alignment
or surface flatness of the exhaust manifold flanges using a straight edge
and a feeler gage. Refer to
Engine Mechanical Specifications
.
If the surface flatness is not within the specifications, the exhaust
manifold is warped and must be replaced.
