Cooling System, Checking For Coolant Leaks
WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
- Cooling System Tester VAG1274B
- Cooling System Tester - Adapter VAG1274/8
- Cooling System Tester - Adapter VAG1274/9
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.
- Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening.
-- Open the coolant reservoir cap.
-- Position the Cooling System Tester VAG1274B with the Cooling System Tester - Adapter VAG1274/8 on the coolant reservoir.
-- Generate approximately 1.0 bar (14.5 psi) pressure using the cooling system tester hand pump.
-- If pressure falls, search for leaks and correct problem.
Pressure Relief Valve in Cap, Checking
Fig 2: Connecting Connector Piece VAG 1274 B/1 To Cooling System Tester VAG 1274 B Using Connecting Hose
-- Position the Cooling System Tester VAG1274B with the Cooling System Tester - Adapter VAG1274/9 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.