Cleaning and Inspection

1. The following materials are required for the cleaning procedure: a 13-25 mm (1/2-to 1-inch) wire-stemmed horse hair or nylon bottle cleaner-type brush, Ford Carburetor Tune-Up Cleaner D9AZ-19579-BA or equivalent meeting Ford specification ESR-M14P9-A, rubber gloves, and eye protection. (Do not use choke cleaner solvents.)

2. Remove lower intake manifold (IMRC).

3. Disconnect the linkage rods from the levers and plastic bushings (if equipped) and verify that the shaft assembly is causing the stick/bind/grab condition.

4. Holding the IMRC housing assemblies vertically, liberally spray the cleaner into each of the eight bores concentrating the spray at each shaft/journal interface. Spray from both the top and bottom side of the bore, rotating the shaft by hand and pushing end-to-end to work the cleaner into the journal areas. Soak assemblies for 15 minutes.

5. Saturate the cleaning brush with solvent and scrub between the bores and valve plates. Apply some pressure on the brush while scrubbing, concentrating on the area where the shaft meets the housing journal.

6. Spray cleaner on the bores, plates, and shaft as needed to wash away any residue.

7. Use shop air to blow away the remaining residue. Concentrate on blowing the residue Out of the shaft/journal area. The shaft should now rotate freely without sticking or binding.

8. NOTE: If the lower intake manifold (IMRC) has been properly cleaned following the above procedure and still does not rotate freely, replace complete lower intake manifold (IMRC).

Re-install linkage rods. Use new plastic bushings (if equipped).

9. Install lower intake manifold (IMRC).