Air Cleaner - Thermostatic: Description

The hot air intake (HAI) system adds hot air supply to carburetor in cold weather to improve driveability and to prevent carburetor icing. Carbureted Corolla and all Land Cruiser and Tercel models use a hot idle compensation valve (HIC) to control opening and closing of air inlet door. Pickup and 4-Runner models use a separate thermal vacuum valve to operate heated air door.