SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 1,9 l SDi engine, mechanics | Engine cooling | Removing and installing cooling system parts

Cooling system water tightness: checking

Special tools and workshop equipment required

t	Tester -SAT 1274-

t	Adapter -V.A.G 1274/8-

t	Adapter -V.A.G 1274/9-

Checking conditions

l	Engine at service temperature.

Test sequence

Caution

Steam can be released when removing the cap from the expansion tank. The cap should be covered with a cloth and opened carefully.

–	The test is done with the -V.A.G 1274- kit and the -V.A.G 1274/8- adaptor

–	Remove the expansion tank cap, and connect the -V.A.G 1274- tester in its place using the -V.A.G 1274/8- adaptor, as shown in the photograph.

–	Produce a pressure of 1 bar with the pump.

–	If the pressure drops for a moderate time, find the non-hermetic point in the installation.

–	Fit tester -SAT 1274- with adaptor -V.A.G 1274/9- in locking cap.

–	Operate hand pump. The pressure relief valve should open at 1.4 … 1.6 bar.

–	At this moment, the pressure valve of the cap should open. If not: replace the cap.

SEAT Workshop Service and Repair Manuals