Cooling System, Draining and Filling
Cooling System, Draining and Filling
Special tools, testers and auxiliary items required
• Refractometer (T10007)
• Drip tray (V.A.G 1306) or drip tray for workshop crane (VAS 6208)
• Spring-type clip pliers (VAS 5024A)
• Cooling system charge unit (VAS 6096)
• Adapter (V.A.G 1274/8)
Draining
• Drained coolant must be stored in a clean container for disposal or reuse.
• Follow disposal regulations.
CAUTION!
Hot steam may escape when opening expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a rag and open very carefully.
- Open cap on coolant expansion tank.
- Remove noise insulation
- Slightly lift the clips - arrow - and remove the coolant hose from the radiator.
- In addition, to drain the coolant from the engine, disconnect the coolant hose at the oil cooler - arrow -.
Filling
CAUTION!
Only use tap water for mixing. Well water does not have the quality necessary to ensure proper coolant function.
• Vehicles from model year 2008 may only use coolant additive (G 12 plus-plus) conforming to TL VW 774 G.
• On vehicles through model year 2007, coolant additive G 12 plus conforming to TL VW 774 F and G 12 plus-plus conforming to TL VW 774 G can be used.
• The coolant additive (G 12 plus-plus) may be mixed only with (G 12 plus)! Both are purple is color.
• Coolant additive with the note "conforming to TL VW 774 G" or "conforming to TL VW 774 F" prevent frost and corrosion damage and scaling and raise the boiling temperature. For this reason the system must be filled all year round with frost and corrosion protection additives.
• Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.
• Protection against frost must be assured to about -25° C (in arctic climatic countries to about -35° C).
• The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The coolant additive portion must be at least 40%.
• If for climatic reasons a greater frost protection is required, the amount of (G 12 plus-plus) 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.
• Refractometer (T10007) is recommended for determining freeze protection density.
• If radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.
Recommended Mixture Ratios
* The quantity of coolant can vary depending upon the vehicle equipment.
* Only use clean tap water.
- Attache the coolant hose to the radiator and secure the clips - arrow -.
- Connect coolant hoses on oil cooler.
- Install noise insulation
Filling With Cooling System Charge Unit (VAS 6096)
- Thread adapter (VAG 1274/8) on expansion tank.
- Fill coolant circuit using cooling system filling unit (VAS 6096) => Operating instructions for cooling system filler unit VAS 6096.
Filling Without Cooling System Charge Unit (VAS 6096)
- Fill coolant to Max marking on expansion tank.
- Close expansion tank.
- Switch the heater fan off.
Without Auxiliary Heater
- Start engine and maintain an engine speed of about 2000 RPM for approximately 3 minutes.
- Let the engine run until the fan starts.
With Auxiliary Heater
CAUTION!
Auxiliary heater should only be switched on if coolant circuit is filled as described below.
- Connect vehicle diagnosis, testing and information system (VAS 5051) as follows:
- Connect diagnostic cable connector - 2 - to Data Link Connector (DLC) in driver's foot well.
- Start engine and maintain an engine speed of about 2000 rpm for approximately 3 minutes.
- Press buttons for "Vehicle Self-Diagnosis", "18 - Auxiliary Heater" and "03 - Output Diagnostic Test Mode (DTM)" on display in succession.
- Press right arrow button on display until you reach Engine Coolant (EC) switch-off valve (heater) (N279) Output Diagnostic Test Mode (DTM).
- Now conduct Engine Coolant (EC) switch-off valve (heater) (N279) Output Diagnostic Test Mode (DTM). Continue to maintain 2000 RPM -for approximately 1 min.-.
- Allow engine to run until coolant fan (V7) starts running.
Continuation for All
- Check coolant level with reservoir closed.
• When the engine is at normal operating temperature, the coolant level must be on the Max. mark, and when the engine is cold, between the Min. and Max. marks.
CAUTION!
Hot steam may escape when opening expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a rag and open very carefully.
- Top off coolant if necessary.