Cooling System, Checking For Leaks

Cooling System, Checking for Leaks

Special tools, testers and auxiliary items required

• Cooling System Tester (V.A.G 1274 B)

• Adapter (V.A.G 1274/8)

• Adapter (V.A.G 1274/9)

Procedure

• Engine at operating temperature.

- Remove cover above coolant reservoir - arrows -.





CAUTION!
Cover the coolant reservoir cap with a cloth and open carefully because steam or hot coolant may escape when opening.

- Open the cap on the coolant reservoir.

- Position the (V.A.G 1274 B) with (V.A.G 1274/8) on the coolant reservoir.





- Generate a positive pressure of approximately 1.0 bar using hand pump of cooling system tester.

If the pressure drops:

- Look for leaking places and fix them.

Pressure Relief Valve in Cap, Checking





- Attach (V.A.G 1274 B) with (V.A.G 1274/9) on sealing cap.

- Generate a positive pressure using hand pump of cooling system tester.

• The pressure release valve must open at 1.4 to 1.6 bar.

If check-valve does not open as indicated:

- Replace cap.