Cooling system, checking for proper seal: Notes

Special tools, testers and auxiliary items required 

Fig 1: Identifying Special Tools - Cooling System, Checking For Proper Seal

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• Cooling system tester V.A.G 1274
• Adapter V.A.G 1274/8
• Adapter V.A.G 1274/9

Conditions 

• Engine at operating temperature.

Work sequence 

Fig 2: Cover Above Coolant Reservoir

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• Remove cover above coolant reservoir - arrows  -.

• Open cap of coolant expansion tank.

Fig 3: Cooling System Tester V.A.G 1274 With Adapter V.A.G 1274/8 Onto Expansion Tank

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• Place cooling system tester V.A.G 1274 with adapter V.A.G 1274/8 onto expansion tank.
• Generate a positive pressure of approx. 1.0 bar using hand pump of cooling system tester.

If the pressure drops:

• Search for leaking areas and repair malfunction.