58. Intake Manifold Clean and Inspect - 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.