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 gauge.
Refer to
Engine Mechanical Specifications
.
If the surface flatness is not within the specifications, the exhaust
manifold is warped and must be replaced.
