57. Intake Manifold Cleaning and Inspection - Lower

Intake Manifold Cleaning and Inspection (Lower)

Important: Do not reuse the lower intake manifold-to-cylinder head sealing gaskets.


1. Inspect the sealing grommet on the MAP sensor. The grommet should not be torn or damaged.
2. Remove and discard the lower intake manifold-to-cylinder head gaskets.
3. Clean the lower intake manifold in an approved solvent.

* Clean the lower intake manifold gasket sealing surfaces.
* Clean all engine coolant passages of scale build up.
* Clean all carbon from the EGR passages.
* Clean all lower intake manifold ports.
* Inspect lower intake manifold sealing surfaces for nicks and cracks.

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

* Dry the lower intake manifold with compressed air.