Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Air Cleaner - Thermostatic: Operation: Notes
During engine warm-up, temperature sensor switch applies vacuum to vacuum motor. Air diverter valve is held to "ON" position. Exhaust manifold heated air flows to air cleaner. As temperature of incoming air increases to 90°F (32°C), temperature sensor opens vacuum line to atmosphere allowing spring pressure to push valve to "OFF" position. Air now flows from outside, through air cleaner duct to carburetor.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.