Cooling System, Checking For Leaks: Procedure
WARNING: This page is about a different car, the 2015 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
- Engine at operating temperature.
WARNING:
Risk of scalding due to hot steam and hot coolant.
- The cooling system is under pressure when the engine is warm.
- Reduce the pressure by covering the coolant expansion tank cap with a cloth and carefully opening it.
-- Open the coolant reservoir cap -arrow-.
-- Position the :VAG1274B with the :VAG1274/8 on the coolant expansion tank.
-- Generate approximately 1.5 bar (21.75 psi) pressure using the cooling system tester hand pump.
- The pressure must not drop more than 0.2 bar (2.9 psi) within 10 minutes.
-- If the pressure falls more than 0.2 bar (2.9 psi), search for leaks and correct the problem.
NOTE:
The pressure decrease of 0.2 bar (2.9 psi) within 10 minutes is a condition of the cooling of the coolant. The colder the engine the more the pressure decrease. If necessary repeat the test with the engine cold.