Volkswagen Golf Service & Repair Manual: Checking cooling system for leaks

Volkswagen Golf Service & Repair Manual / 4- cylinder injection engine(1.4 1 direct inction. turbocharger) / Engine cooling / Cooling system, coolant / Checking cooling system for leaks

Special tools and workshop equipment required

Cooling system tester -V.A.G 1274 B-

Checking cooling system for leaks

Adapter for cooling system tester -V.A.G 1274/8-

Checking cooling system for leaks

Adapter for cooling system tester -V.A.G 1274/9-

Procedure

Checking cooling system for leaks

–	Open cap -arrow- on coolant expansion tank.

Engine at operating temperature.

The cooling system is under pressure when the engine is hot. Hot steam/hot coolant can escape - risk of scalding. Risk of scalding to skin and body parts.Wear protective gloves.Wear eye protection.Release pressure by covering cap of coolant expansion tank with a cloth and opening it carefully.

Checking cooling system for leaks

–	Fit cooling system tester -V.A.G 1274 B- with adapter -V.A.G 1274/8- on coolant expansion tank.

–	Using hand pump on tester, build up a pressure of approx. 1.0 bar.

–	If this pressure is not maintained, locate and rectify leaks.

Checking cooling system for leaks

Checking pressure relief valve in filler cap

–	Place cooling system tester -V.A.G 1274 B- with adapter -V.A.G 1274/9- on filler cap.

–	Build up pressure using hand pump of cooling system tester.

The pressure relief valve must open at a pressure of 1.6…1.8 bar.

Checking cooling system for leaks

Draining and filling coolant

Special tools and workshop equipment required Refractometer -T10007 A- Drip tray for workshop hoist -VAS 6208- Hose clip pliers -VAS 634 ...

Coolant pump, regulation of cooling system

...

Other materials:

Removing and installing Hall sender 3 -G300-
Removing – Release hose clips -1- and -2-, and remove air pipe. – Disconnect electrical connector -1-. ...

Removing and installing condensation drainage (LHD)
Removing – Remove right centre console trim in footwell → General body repairs, interior; Rep. gr.68. Risk of damage to airbag control unit. Connectors may corrode if moisture enters.After disconnecting, ...

Assembly overview - radiator and radiator fan
1 - Radiator Removing and installing → Chapter Change coolant after renewing. 2 - Coolant hose Pull out retaining clip to remove. Connecting → Fig. ...