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 recirulation (EGR) pipe fitting (2)
(left manifold) |
| • | Damage to the take down bolt hole threads (3) |
| • | Broken or damaged exhaust manifold heat shields (4) (if applicable) |
| • | Restrictions within exhaust passages |
| • | Damaged or cracked exhaust manifold |
- Measure the alignment
or surface flatness of the exhaust manifold flanges, using a straight edge
and a feeler gauge. Refer toEngine Mechanical Specifications (5.7L)
.
If the surface flatness is not within specifications, the exhaust manifold
is warped and must be replaced.
