Checking cooling system for leaks, low-temperature circuit — VW

🧭 Before you start

Fits: VW Touareg II (7P, 2010–2018)

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• Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open filler cap on coolant expansion tank.
• The pressure drop of 0.2 bar within 10 minutes is due to cooling down of the coolant . The colder the engine is, the lower the pressure drop. Repeat the test on a cold engine if necessary.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open filler cap on coolant expansion tank.
2. Screw adapter for cooling system testerV.A.G 1274/8 into coolant expansion tank.
3. Clamp connectorV.A.G 1274 B/1 onto adapter for cooling system testerV.A.G 1274/8.
4. Join connection pieceV.A.G 1274 B/1 to cooling system testerV.A.G 1274 B using connecting hose supplied.
5. Generate a pressure of approx. 1.5 bar using hand pump of cooling system tester.

6. If the pressure drops by more than 0.2 bar, locate and rectify the leaks. [Note: The pressure drop of 0.2 bar within 10 minutes is due to cooling down of the coolant . The colder the engine is, the lower the pressure drop. Repeat the test on a cold engine if necessary.]
7. ⚠ Risk of scalding! Before disconnecting cooling system testerV.A.G 1274 B from connecting hose or connectorV.A.G 1274 B/1, relieve existing pressure under all circumstances. To do this, press pressure relief valve on cooling system testerV.A.G 1274 B until pressure gauge displays value of »0«. — Screw cap into adapter for cooling system testerV.A.G 1274/9.
8. Clamp connectorV.A.G 1274 B/1 into adapter for cooling system testerV.A.G 1274/9.
9. Join connection pieceV.A.G 1274 B/1 to cooling system testerV.A.G 1274 B using connecting hose supplied.
10. Operate hand pump.

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