Caution: Refer to Safety Glasses Caution in the Preface section.
- 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 threaded holes (2) |
| • | Restrictions within exhaust passages |
| • | Broken or damaged exhaust manifold heat shields (3), 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.
