Cooling System, Checking For Leaks
WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, 2013 Audi Q7, 2012 Audi Q7, and 2011 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
- Cooling System TesterVAG1274B
- Cooling System Tester - AdapterVAG1274/8
- Cooling System Tester - AdapterVAG1274/9
Procedure
- Engine at operating temperature.
WARNING:
Risk of scalding due to hot steam and hot coolant.
- The coolant system is under pressure when the engine is warm.
- Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure.
-- Open the coolant reservoir cap.
-- Position the Cooling System TesterVAG1274B with the Cooling System Tester - AdapterVAG1274/8 on the coolant reservoir.
Fig 1: Identifying Cooling System Tester V.A.G 1274 B With Adapter V.A.G 1274/8 Installed On Coolant Expansion Tank
-- Generate a positive pressure of approximately 1.0 bar (14.5 psi) using the hand pump on the cooling system tester.
-- If pressure falls, search for leaks and correct problem.
Refer to COOLING SYSTEM, CHECKING FOR LEAKS .
-- Position the Cooling System TesterVAG1274B with the Cooling System Tester - AdapterVAG1274/9 on the cap.
-- Generate pressure with cooling system tester hand pump.
- The pressure release valve must open at 1.4 to 1.6 bar (20.30 to 23.20 psi).
-- If pressure relief valve does not open as specified, replace cap.