Cooling System, Checking For Leaks: Notes

Special tools and workshop equipment required

Cooling System Tester: VAG1274B

Fig 1: Cooling System Tester VAG1274B
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Cooling System Tester - Adapter: VAG1274/8

Fig 2: Identifying Cooling System Tester Adapter
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Cooling System Tester - Adapter: VAG1274/9

Fig 3: Cooling System Tester - Adapter VAG1274/9
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Procedure

Fig 4: Identifying Coolant Reservoir Cap

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CAUTION:

The cooling system is under pressure when the engine is warm. There is a risk of scalding due to hot steam and hot coolant.

Scalding the skin and other parts of the body is possible.

- Wear safety gloves.

- Wear protective eyewear.

- Reduce the pressure by covering the coolant expansion tank cap with a cloth and carefully opening it.

-- Open the coolant reservoir cap -arrow-.

-- Position the Cooling System Tester: VAG1274B with the Cooling System Tester - Adapter: VAG1274/8 on the coolant expansion tank.

Fig 5: Cooling System Tester V.A.G 1274 Connected To Coolant Reservoir

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-- Generate approximately 1 bar (14.5 psi) pressure using the cooling system tester hand pump.

-- If the pressure falls, search for leaks and correct the malfunction.