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.
General Motors THERMAC Air Cleaner: Description
The Thermac Air Cleaner assembly is installed to reduce amount of carbon monoxide in exhaust gases. This reduction is accomplished by regulating air temperature at air cleaner inlet. System consists of air cleaner assembly with integral damper assembly, temperature sensor, vacuum motor, vacuum hoses and exhaust shroud with connecting pipe. Oldsmobile uses two different temperature sensors, a green one with 1 and 4 barrel carburetors and a blue one with 2 barrel carburetors.
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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.