Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.4 ltr./55 kW Engine - Mechanical Components | Engine cooling | Removing and installing parts of the cooling system | Checking the coolant system for tightness

Checking the coolant system for tightness

Special tools and workshop equipment required

t	Coolant system tester 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 conditions

l	Engine must be warm

Test sequence

–	Open the cap of the coolant expansion reservoir.

WARNING

Hot steam may escape when the compensation bottle is opened. Cover the cap with cloths and open carefully.

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

–	With the hand pump of the tester generate an overpressure of approx. 0.1 MPa.

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

Testing the pressure relief valve in the cap

–	Screw cap onto tester with adapter - V.A.G 1274/9-.

–	With the hand pump of the tester generate an overpressure of approx. 0.15 MPa.

–	The pressure relief valve must open for an overpressure of 0.12 to 0.15 MPa.

Skoda Workshop Service and Repair Manuals