Air Cleaner Housing: Testing and Inspection

Fig. 40 Air Control Door:

This procedure requires an air cleaner temperature of less than 80° F (25° C).

1. Remove outside air intake duct. Start engine, if air control door rises, Proceed to step 7.

2. Stop engine, remove vacuum line from air control diaphragm, using a vacuum pump apply vacuum to diaphragm while looking though outside air intake duct. If door does not rise replace air control diaphragm.

3. Remove vacuum hose from air cleaner mounted air bleed.

4. Using a vacuum pump apply vacuum to air bleed.

5. If air bleed valve does not hold vacuum replace air bleed valve.

6. Inspect check valve and source vacuum line. Replace as necessary.

7. Make sure air cleaner lid is installed. Start engine and run until cooling fan comes on. Air control door should be down.

8. If air control door did not drop in above test replace air bleed valve.