Procedures
INSPECTION
NOTE: When the upper intake manifold (3) and lower intake manifold (1) are not aligned properly, cross threading of the upper intake manifold attaching bolts can occur. The graphic shows non-repairable damage to the lower intake manifold (1) due to cross threading of an upper intake manifold attaching bolt (2).
Check both the upper and lower intake manifolds for:
- Damage and cracks
- Gasket surface damage or warping
Check the lower intake manifold for:
- Damaged fuel injector ports
If either the upper or lower manifold exhibits any damaged or warped conditions, replace the manifold.