Skoda Workshop Service and Repair Manuals > Fabia Mk1 > Power unit | 1.9/47 kW SDI Engine | Engine cooling | Parts of cooling system - Summary of components | Checking the coolant system for leaktightness | Inspecting coolant system with cooling system testing deviceV.A.G 1274 for tightness

Inspecting coolant system with cooling system testing deviceV.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 for cooling system testing device, e.g. -V.A.G 1274/8-

t	Adapter for cooling system testing device, 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.

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 compensation bottle.

–	Position the cooling system testing device -V.A.G 1274- with adapter -V.A.G 1274/8- on the coolant expansion reservoir.

–	Using the hand pump of the testing device generate an overpressure of approx. 0.1 MPa (1.0 bar).

If the pressure drops:

–	Search position of the leak and repair fault.

Testing the pressure relief valve in the cap

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

–	Operate the handpump.

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

If the pressure relief valve opens too early or too late:

–	Replace cap.

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