240 L4-2127cc 2.1L SOHC B21A (Can) (1984)
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Thermostatic Air Cleaner: Description and Operation
B21FT Engine (Turbo)
Fig. 30 THERMOSTATIC AIR CONTROL SYSTEM
The thermostatic air cleaner housing consists of a thermostatically operated air damper and hot and cold air inlet ducts. The thermostat senses the air
temperature and positions the damper for the correct hot/cold air mixture. The hot air gets drawn from near the exhaust manifold, while the cold air gets
taken from the regular outside inlet duct. This results in a constant intake air temperature, regardless of the outside temperature. Fig. 30.
The thermostatic air control system improves driveability during warm-up, and while driving in very cold weather.
Thermostatic Air Control thermostat:
Hot air only to 5°C (41°F)
Cold air only from 15°C (59°F)
