THERMACTOR Air (Reed) Check Valve
- With engine off, inspect hoses and clamps from pulse air valve to air cleaner for cracks, splits, etc. Tighten or replace a necessary.
- Disconnect hose from air inlet valve to air cleaner at valve. Connect Thermactor air valve tester (T75L-9487 or equivalent) to open end of air valve. Position hose clamp and tighten.
- Squeeze test bulb to force as much air from bulb as possible. Quickly release bulb and note time it takes to return to normal shape. Bulb should remain collapsed for at least 15 seconds. If bulb returns to normal shape in less than 15 seconds, valve is defective and should be replaced.