Cooling System, Checking For Leaks: Notes

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Cooling System Tester: VAG1274B

Fig 1: Cooling System Tester VAG1274B
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Cooling System Tester - Adapter: VAG1274/8

Fig 2: Identifying Cooling System Tester Adapter
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Cooling System Tester - Adapter: VAG1274/9

Fig 3: Cooling System Tester - Adapter VAG1274/9
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Procedure

Fig 4: Identifying Coolant Reservoir Cap

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CAUTION:

The cooling system may be under pressure. 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 suitable towel and carefully opening it.

-- Remove the coolant expansion tank 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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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.