Cooling System, Checking For Coolant Leaks: Notes

WARNING: This page is about a different car, the 2009 Volkswagen Rabbit, 2008 Volkswagen Rabbit, 2007 Volkswagen Rabbit, and 2006 Volkswagen Rabbit. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Cooling System Tester V.A.G 1274 B
Adapter V.A.G 1274/8
Adapter V.A.G 1274/9

Test Conditions

The engine is at operating temperature

Test Sequence

WARNING:

Steam can be released when the cap is removed from the expansion tank. Cover the cap with a cloth and open carefully.

-- Open the cap on the coolant expansion tank.

-- Install the adapterV.A.G 1274/8 onto the coolant expansion tank.

-- Clamp the connecting pieceV.A.G 1274 B/1 on the adapterV.A.G 1274/8.

-- Connect the connector pieceV.A.G 1274 B/1 to the cooling system testerV.A.G 1274 B using the connecting hose.

Fig 1: Identifying Cooling System Tester V.A.G 1274 Connected To Coolant Reservoir

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Generate a positive pressure of approximately 1.0 bar using the tester hand pump.

CAUTION:

Risk of scalding! Reduce the pressure before disconnecting the cooling system testerV.A.G 1274 B from the connecting hose or connector pieceV.A.G 1274 B/1. To do this, press the pressure release valve on the cooling system testerV.A.G 1274 B until the pressure gauge displays 0.

If the pressure drops:

-- Look for leaks and correct.