Cooling System, Checking For Leaks: Notes

Special tools and workshop equipment required

: VAG1274B , Checking (Self-Test)

Fig 1: Special Tool VAG1274B

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-- Operate the : VAG1274B multiple times.

-- Create a pressure of 3.0 bar (43.51 psi) on the : VAG1274B .

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-- Observe the pressure on the pressure gauge of the : VAG1274B for 30 seconds.

If No Pressure Is Built or the Pressure Decreases:

The : VAG1274B is leaking and must not be used.

Procedure

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.

-- Carefully open the coolant reservoir cap -arrow-.

Fig 2: Identifying Coolant Reservoir Cap

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-- Position the : VAG1274B with the : VAG1274/8 on the coolant expansion tank.

Fig 3: Cooling System Tester V.A.G 1274 Connected To Coolant Reservoir

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-- Generate a positive pressure of approximately 1.0 bar (14.5 psi) using the hand pump on the tester.

-- If pressure decreases, search for leaking areas and repair the malfunction.