Cooling System, Checking For Leaks
WARNING: This page is about a different variant/trim than selected.
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.