Skoda Workshop Service and Repair Manuals > Octavia Mk2 > Power unit | 2.0/81; 103; 125 kW TDI CR Engine (2nd generation) | Engine cooling | Radiator and radiator fan | Checking the coolant system for leaktightness | Checking with the cooling system testing deviceV.A.G 1274

Checking with the cooling system testing deviceV.A.G 1274

Checking with the cooling system testing device -V.A.G 1274-

Special tools and workshop equipment required

t	Cooling system testing device, e.g. -V.A.G 1274-

t	Adapter, e.g. -V.A.G 1274/8-

t	Adapter, e.g. -V.A.G 1274/9-

Test condition

l	Engine is at operating temperature.

Test sequence

WARNING

Hot steam or hot coolant may escape when the compensation bottle is opened.

t	Wear safety goggles and safety clothing, in order to avoid eye injuries and scalding.

t	Cover the cap with a cloth and open carefully.

–	Open the cap of the coolant expansion reservoir.

–	Position tester -V.A.G 1274- with adapter -V.A.G 1274/8- on the compensation bottle.

–	Generate a pressure of approx. 0.1 MPar (1.0 bar) for testing the cooling system.

If the pressure drops:

–	Search position of the leak and repair fault.

Test the pressure valve in the cap

–	Position the cooling system testing device -V.A.G 1274- with adapter -V.A.G 1274/9- on the cap.

–	Generate a pressure for testing the pressure valve in the screw cap.

l	The pressure valve should open at a pressure of 0.14...0.16 MPa (1.4...1.6 bar).

If the valve does not open in the prescribed pressure range:

–	Replace cap.

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