Intake Manifold Clean and Inspect

CAUTION: Wear safety glasses in order to avoid eye damage.





1. Clean the upper intake manifold in cleaning solvent.
2. Dry the upper intake manifold with compressed air.





3. Clean the lower intake manifold in cleaning solvent.
4. Dry the lower intake manifold with compressed air.





5. Inspect the upper intake manifold for the following:
- Cracks or other damage to the exterior
- Cracking or damage in the gasket grooves
- Loose or damaged bolt hole thread inserts
- Damage to the throttle body mounting surface

6. Inspect the lower intake manifold for the following:
- Cracks or damage
- Damage to the gasket sealing surfaces
- Damage to the threaded bolt holes
- Restricted exhaust gas recirculation (EGR) system passages
- Restricted cooling system passages