Checking the temperature regulator of the air sucked in by the engine

All engines are equipped with an engine intake air temperature controller that supplies air to the carburetor from various locations depending on engine temperature.

Checking the temperature regulator of the air sucked in by the engine is carried out visually, for this you can use a small mirror.

The thermostatic damper is located inside a long intake tube under the metal air filter housing and is visible from the air filter housing. Make sure the flexible air hose is securely connected and not damaged.

If there is a flexible air duct attached to the end of the tube and leading to the area behind the front grille, disconnect it from the tube. This will make it possible through the end of the tube to observe the position of the thermostatic valve located inside the tube.

The check must be carried out on a cold engine. Start the engine and observe the position of the damper in the tube, which should close. When the damper is closed, air cannot enter through the tube, but enters the air filter through a flexible corrugated hose connected to the air intake located near the exhaust manifold.

After the engine has warmed up to operating temperature, the damper should open and allow air to enter through the air intake tube. Depending on the ambient temperature, this can take 10-15 minutes. To speed up the test, you can connect the air duct, drive the car and check if the damper is fully open.

If the engine air intake thermostat is not working properly, replace it.