Checking the engine intake air thermostat (Mazda Capella GC)

All engines are equipped with an engine air intake thermostat, which supplies air to the carburetor from different locations depending on engine temperature.

Checking the engine air intake thermostat is done visually; a small mirror can be used for this purpose.

The thermostat flap is located inside the long air 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 flexible ducting 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 to observe the position of the thermostat valve located inside the tube through the end of the tube.

The check must be performed on a cold engine. Start the engine and observe the position of the valve 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.

Once 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 may take 10–15 minutes. To speed up the test, you can connect the air duct, take the car for a drive, and check that the damper is fully open.

The original article is available on: www.MazBook.ru

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