Skoda Workshop Service and Repair Manuals > Octavia Mk2 > Power unit | 1.6/55; 66; 77 kW TDI CR Engine | Engine cooling | Radiator and fan | Checking the coolant system for leaktightness | Inspecting coolant system with cooling system testing device V.A.G 1274 for tightness

Inspecting coolant system with cooling system testing device V.A.G 1274 for tightness

Inspecting coolant system with cooling system testing device -V.A.G 1274- for tightness

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 may escape when the compensation bottle is opened. Cover the cap with a cloth and open carefully.

–	Open the cap of the coolant expansion reservoir.

–	Position Cooling system testing device (e.g. -V.A.G 1274-) with adapter (e.g. -V.A.G 1274/8-) on the compensation bottle.

–	Using the hand pump of the testing device generate an overpressure of approx. 0.1 MPa (1 bar).

–	If the pressure drops determine positions of the leak and repair.

Testing the pressure relief valve in the cap

–	Screw cap onto tester with adapter (e.g. -V.A.G 1274/9-).

–	Using the hand pump of the testing device generate an overpressure of approx. 0,16 MPa (1,6 bar).

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

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