Thermostatic Air Cleaner: Testing and Inspection

THERMAC Operation:

- Check that all hoses and heat stove tube are connected. Check for kinked, plugged or deteriorated hoses.
- Check for presence and condition of air cleaner-to-carburetor gasket.
- With air cleaner assembly installed, hot air control valve door should be open to outside air.
- Start engine and observe valve door in air cleaner snorkel. Door should move to close off outside air when engine is first started. As air cleaner warms up, door should slowly open to outside air.
- If operation is not as described, test vacuum motor. If there is a driveability problem during warm-up, test temperature sensor.