Skoda Workshop Service and Repair Manuals > Fabia Mk2 > Drive unit | 1.9/77 kW TDI PD Engine | Engine cooling | Removing and installing parts of the cooling system | Checking the coolant system for leaktightness (Fabia II, Roomster)

Checking the coolant system for leaktightness (Fabia II, Roomster)

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	The engine is at operating temperature.

Test sequence

WARNING

Hot steam or hot coolant 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 the coolant system testing device (e.g. -V.A.G 1274-) with adapter (e.g. -V.A.G 1274/8-) on the expansion reservoir.

–	Generate an overpressure of approx. 1 bar (0.1 MPa) for testing the cooling system.

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

Testing the pressure relief valve in the cap

–	Position coolant system tester e.g. -V.A.G 1274- with adapter e.g. -V.A.G 1274/9- on the screw cap.

–	At the tester generate an overpressure of approx. 1.5 bar (0.15 MPa).

–	The pressure relief valve must open for an overpressure of 1.2...1.5 bar (0.12...0.15 MPa).

If the pressure relief valve does not open:

–	Replace cap.

Skoda Workshop Service and Repair Manuals