Cooling System, Checking For Coolant Leaks

WARNING: This page is about a different car, the 2015 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Cooling System Tester VAG1274B
Cooling System Tester - Adapter VAG1274/8
Cooling System Tester - Adapter V.A.G1274/9

Procedure

Engine at operating temperature.

WARNING:

Risk of scalding due to hot steam and hot coolant.

The coolant system is under pressure when the engine is warm.
Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening.

-- Remove the cap -1- from the coolant reservoir -2- in direction of -arrow-.

Fig 1: Identifying Coolant Reservoir

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Position the Cooling System Tester VAG1274B with the adapter VAG1274/8 on the coolant reservoir.

Fig 2: Identifying 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 pressure falls, search for leaks and correct problem.

Refer to Pressure Relief Valve in Cap, Checking

Fig 3: Connecting Connector Piece V.A.G 1274 B/1 To Cooling System Tester V.A.G 1274 B Using Connecting Hose

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Position the Cooling System TesterVAG1274 B with the adapter V.A.G1274/9 on the cap.

-- Generate pressure with cooling system tester hand pump.

The pressure release valve must open at 1.6 to 1.8 bar (23.2 to 26.1 psi).

-- If pressure relief valve does not open as specified, replace cap.