Thermostatic Air Cleaner: Testing and Inspection

1. Remove air cleaner assembly and cool to below 40 degrees FAHRENHEIT. The damper should be closed to outside air.
2. Check for presence and condition of air cleaner to throttle body gasket.
3. Reinstall air cleaner and be sure heat stove tube is connected at air cleaner snorkel and exhaust manifold.
4. Start engine. Watch damper door in air cleaner snorkel. As air cleaner warms up, damper door should open slowly to outside air.
5. If air cleaner fails to operate as described, be sure calibrated spring is properly installed and damper is not binding. If OK, replace wax pellet actuator assembly.