Remove the threaded cap from the expansion tank, check the pipes and cap for rust and scale, replace them if necessary.
Warning! The cap can be removed only after the radiator has cooled down to normal temperature, otherwise you can get burned by hot coolant. For safety, cover the cap with a rag.
Instead of the screw plug, screw in a pressure tester.
Create pressure in the cooling system by pressing the gas pedal several times. The excess pressure should be approximately 1.2 bar.
The created pressure should remain constant for about 10 seconds. If the pressure drops, then it is necessary to find leaks in the cooling system. Due to excess pressure in unsealed places, the coolant flows out.
Release the pressure and unscrew the pressure tester.
Checking the safety valve
The safety valve is located in the threaded cap of the expansion tank. The valve's task is to maintain a certain pressure in the cooling system so that the boiling point of the coolant increases.
To check, screw the threaded radiator cap with the adapter onto the test device.
Create pressure in the system and check the scale to see at what pressure the valve opens. Compare the result with the value on the threaded cap. If the specified value is not reached, the cap must be replaced
Check the coolant level and top it up to the maximum mark if necessary.
Screw the threaded cap onto the expansion tank, if the rubber seal is defective, replace it.
[For more information, please visit the specified website: www.FordBook.ru]