SEAT Workshop Service and Repair Manuals

Draining off and filling coolant t  Empty → Anchor t  Filling → Anchor

Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Refractometer -T10007A-, see equivalent → Anchor

t	Adapter -VAG 1274/8-, see equivalent → Anchor

t	Coolant charger -VAS 6096-, see equivalent → Anchor

t	Collecting tray -VAS 6208-, see equivalent → Anchor

t	Pliers for spring-loaded band-type clamps -VAS 6499-, see equivalent → Anchor

t  Adapter -VAG 1274/10-, see equivalent → Anchor Empty   Note Collect drained coolant in a clean container for re-use or disposal.   WARNING Hot coolant and vapours can cause burns! t  When the engine is hot the cooling system is under pressure. t  To reduce the system charge pressure, cover the expansion tank plug with a rag and open carefully. –  Open filler cap on coolant expansion tank.

–  Loosen the fasteners -2-, -3- and -5- and remove the front noise insulation.

–  Place the drip tray -VAS 6208- under the engine. –  Remove drain plug -1- and drain off coolant.   Note Disregard: -Pos. 2-. Filling   Note t  The cooling system is filled all year round with a mixture of water and coolant additive. Mixture ratio → Anchor. t  Use only the coolant additive listed in the → Electronic parts catalogue. Other coolant additives could seriously impair in particular the anti-corrosion properties. The resulting damage could lead to loss of coolant and consequently to serious engine damage. t  The specified coolant (based on recommended mixture ratio) → Anchor prevents frost and corrosion damage and stops scaling. Such additives also raise the boiling point of the coolant. For these reasons the cooling system must be filled all year round with the correct antifreeze and anticorrosion additive. t  Thanks to this rise in the boiling point, the coolant guarantees good running, even when the engine undergoes heavy strain, especially in countries with tropical climates. t  Frost protection is required down to about -25 ℃ (in countries with arctic climate: down to about -35 ℃). t  The concentration of the coolant must not be reduced by adding water in summer or in countries with hot climates. The coolant concentration must be at least 40 %. t  If greater frost protection is required in very cold climates, the concentration of coolant additive can be increased, but only up to 60% (this gives frost protection to about -40 ℃). If the concentration exceeds 60%, frost protection decreases again and cooling efficiency is also impaired. t  Mix the coolant only with drinkable water. t  If radiator, heat exchanger, cylinder head, cylinder head gasket or cylinder block have been renewed, do not re-use old coolant. t  Contaminated or dirty coolant must not be used again. t  To check the antifreeze protection in the coolant system use the refractometer -T10007A-. Recommended mixture ratio for coolant l  Coolant (40 %) and water (60 %) for frost protection to -25 ℃ l  Coolant (50 %) and water (50 %) for frost protection to -35 ℃ l  Coolant (60 %) and water (40 %) for frost protection to -40 ℃ t  Coolant: → Electronic parts catalogue

–  Close drain plug -1-.

–  Fill the coolant tank of the cooling system charge unit -VAS 6096- with at least 10 litres of premixed coolant according to the recommended mixing ratio → Anchor. –  Screw adapter -VAG 1274/8- onto coolant expansion tank. –  Fit the coolant charger -VAS 6096- onto the adaptor -VAG 1274/8-. –  Run vent hose -1- into a small container -2-.   Note The vented air draws along a small amount of coolant, which should be collected. –  Close both valves -A- and -B- (turn lever at right angles to direction of flow). –  Connect hose -3- to compressed air. l  Pressure: 6 ... 10 bar of pressure.

–  Open valve -B- by setting lever in direction of flow. l  The suction jet pump generates a partial vacuum in the cooling system; the needle on the gauge should move into the green zone. –  Also briefly open valve -A- (turn lever in direction of flow) so that hose of the coolant reservoir of the cooling system charge unit -VAS 6096- can fill with coolant. –  Close valve -A- again. –  Leave valve -B- open for another 2 minutes. l  The suction jet pump continues to generate a partial vacuum in the cooling system; the needle on the gauge should remain in the green zone. –  Close valve -B-. l  The needle on the gauge should stop in the green zone. The vacuum level in the cooling system is then sufficient for subsequent filling.   Note t  If the needle does not reach the green zone, repeat the process. t  Check cooling system for leaks if the vacuum is not maintained. –  Disconnect the compressed air hose. –  Open valve -A-. l  The vacuum in the cooling system causes the coolant to be drawn out of the coolant tank of the cooling system charge unit -VAS 6096- the cooling system is then filled. –  Detach cooling system charge unit -VAS 6096- from the adapter -VAG 1274/8- on coolant expansion tank.

–  Connect the hose to the adapter -VAG 1274/10- as well as the adapter -VAG 1274/8-.

–  Release coolant hose going to heat exchanger and pull back hose until bleeder hole in hose -arrow- is no longer blocked by the connection. –  Fill up with coolant until it flows out at bleeder hole in coolant hose. –  Push coolant hose back onto connection and secure with spring-type hose clip. –  Close filler cap on expansion tank. –  Start the engine. –  Set temperature to „HI“ in all zones. –  Switch off air conditioner compressor (press ECON button). –  Run engine for 3 minutes at 2000 rpm. –  Allow engine to run at idling speed until two large coolant hoses at radiator become warm. –  Run engine for 2 minutes at 2000 rpm. –  Switch off ignition and allow engine to cool down. –  Install front soundproofing → Rep. gr.66.   WARNING Hot coolant and vapours can cause burns! t  When the engine is hot the cooling system is under pressure. t  To reduce the system charge pressure, cover the expansion tank plug with a rag and open carefully.

–  Check coolant level. l  The coolant level must be at the „MAX“ marking when the engine is cold. l  The coolant level can be above the „MAX“ marking when the engine is warm.