- Clean the exhaust manifolds in solvent.
Caution: Refer to Safety Glasses Caution in the Preface section.
- Dry the exhaust manifolds with compressed air.
- Inspect the exhaust manifolds for the following conditions:
| • | Damage to the gasket sealing surfaces |
| • | 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.
