53. Intake Manifold Cleaning and Inspection

Intake Manifold Cleaning and Inspection

Important: Do not use the intake manifold gaskets or end seals again.

1. Clean the intake manifold in an approved solvent.
^ Clean debris out of all bolt holes.
^ Clean the intake manifold gasket sealing surfaces.
^ Clean all intake manifold ports.





2. Caution: Refer to Safety Glasses Caution.

Dry the intake manifold with compressed air.
3. Inspect the following components:
^ The intake manifold bolt holes (1) for cracks and/or damage
^ The manifold absolute pressure (MAP) sensor sealing surface (2) for damage
^ The evaporative emission (EVAP) purge valve sealing surface (4) for damage The purge valve bolt has a sealer that may come off during removal of the bolt. Ensure all sealant is removed from the bolt hole.
^ The intake manifold-to-cylinder head sealing surfaces (3) for damage
^ The throttle body studs (5) for damage Replace, as necessary.
^ The throttle body mounting surface (6) for damage
^ The oil fill tube hole (7) for signs of leakage Seal, as necessary.
^ Positive crankcase ventilation (PCV) port (8) for debris or varnish buildup