SEAT Workshop Service and Repair Manuals

Draining and filling cooling system t  Empty → Anchor t  Filling → Anchor

Special tools and workshop equipment required

t	Setting gauge -T10007-

t	Tray -T20173-

t	attachment tool -T20174-

t	Adapter -VAG 1274/8-

t	Charger -VAS 6096-

t	Tank -VAS 6096/1-

Draining   Note Catch drained-off coolant in a clean container for re-use or disposal.   WARNING Hot vapour/hot coolant may escape when opening expansion tank. Cover cap with cloth and open carefully. –  Open cap of coolant expansion tank.

–  Remove central soundproofing -Anchorage points 1 ... 3-. –  Place the drip tray -T20173- under the engine.

Engines BLR, BLY –  Turn drain plug -arrow- on radiator anti-clockwise, if necessary fit drain hose to connection.

Engines BVY, BVZ –  Release the quick connection -arrow-, and remove the coolant hose from the radiator.

Continue for all engines –  Disconnect the connector -1- of the oil pressure sender -F1-. –  Also remove the coolant hose -2- and allow the remaining coolant to drain off. Top up   Note t  The cooling system is filled all year round with a mixture of water and coolant additive (combined anti-freeze and corrosion protection agent). t  Only use coolant additive Plus -G 012 A8F A1- (»abbreviated: G12+«), „according to TL VW 774 F“. Other additives may have considerable effect on the anti-corrosion. Resulting damages may cause coolant loss and may lead to heavy engine damages. t  Coolant additive »G12+« can be mixed up with additives »G11« and »G12«. t  »G12+« and coolant additives marked with „according to TL VW 774 F“ prevent frost and corrosion damage as well as scaling. Such additives also raise the boiling point of the coolant. For these reasons, the cooling system must be filled all year round with a frost and corrosion protection additive. t  Because of its higher boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates. t  Frost protection is required down to about -25 °C (in countries with arctic climates: down to about -35 °C). t  The concentration of the coolant must not be reduced by adding water in summer or in countries with hot climates. The amount of anti-freeze in the coolant must be at least 40 %. t  If for climatic reasons a greater frost protection is required, the amount of »G12+« can be increased, but only up to 60 % (frost protection to about -40 °C), as otherwise frost protection is reduced again and cooling effectiveness is also reduced. t  To mix up the coolant use clean drinking-water only. t  If radiator, heat exchanger, cylinder head, cylinder head gasket or cylinder block is replaced, do not reuse old coolant. t  Contaminated or dirty coolant must not be used again. t  Use refractometer -T10007- to check frost protection of coolant additive »G12+« in cooling system.

Engines BLR, BLY –  Close drain screw -arrow-.

Engines BVY, BVZ Fit the coolant hose -arrow-.

Continue for all engines –  Attach coolant hose -2-. –  Disconnect the connector -1- from the oil pressure sender -F1-.

–  Fill coolant reservoir -VAS 6096/1- with at least 8 l premixed coolant of the right mixture ratio: l  »G12+« (40 %) and water (60 %), for a protection to -25 ℃ l  »G12+« (50 %) and water (50 %), for a protection to -35 ℃ l  »G12+« (60 %) and water (40 %), for a protection to -40 ℃ –  Fit adaptor for cooling system tester -V.A.G 1274/8- to the coolant expansion tank. –  Fit charger -VAS 6096- onto adaptor -V.A.G 1274/8-. –  Run vent hose -1- into a small container -2-. When flashing off a small quantity of coolant is carried away, which is to be collected. –  Connect both valves -A- and -B- (lever arm transverse to direction of flow). –  Connect hose -3- to compressed air. l  Pressure: 6 … 10 bar

–  Open valve -B- (lever arm pointing in direction of flow). The suction jet pump creates a vacuum in the cooling system. l  The display instrument needle must move to the green area. –  Also briefly open valve -A- (turn lever in direction of flow) so that the charger -VAS 6096- hose can fill with coolant. –  Close valve -A- again. –  Leave valve -B- open for another 2 minutes. l  The suction jet pump creates further vacuum in the cooling system. l  The pointer of the indicator must remain in the green zone. –  Close valve -B-. l  The display instrument needle must remain in the green area so that the vacuum in the cooling system is sufficient to continue with the refilling. If the needle does not reach the green zone, repeat the process. If the vacuum drops the cooling system is leaking. –  Detach compressed air hose. –  Open valve -A-. The vacuum in the cooling system causes the coolant to be drawn out of the cooling system charge unit -VAS 6096/1-; the cooling system is then filled.

–  Check coolant level and fill coolant up to max. mark. –  Start engine and run at approx. 1500rpm for max. 2 minutes and at the same time fill with coolant up to overflow hole on expansion tank. –  Close expansion tank. –  Run engine until radiator fan cuts-in.   WARNING Hot vapour/hot coolant may escape when opening expansion tank. Cover cap with cloth and open carefully. –  Check coolant level and top-up if necessary. l  When the engine is at normal operating temperature, the coolant level must be on the max. mark and between the min. and max. marks when the engine is cold. –  Switch engine off.