Draining and filling coolant — AUDI

🧭 Before you start

Fits: VW Caddy IV (SA, 2015–2020)

• Opens: coolant
• Special tools named: VAS 6096, V.A.G 1274/8

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• Exhaust air takes a slight quantity of coolant along with it; this should be collected.
• If the needle does not reach the green zone, repeat the process.If the vacuum drops, the cooling system must be checked for leaks.
• Fill coolant up to max. mark.
• With engine running, fill coolant up to approx. 5 mm above max. mark.

🔧 Engine codes this applies to

📋 Procedure

1. Open filler cap (arrow) on coolant expansion tank.
2. If fitted, remove noise insulation General body repairs, exterior66Noise insulation; Removing and installing noise insulation.
3. Set drip tray for workshop hoistVAS 6208 underneath.
4. Disconnect connector (2) from radiator outlet coolant temperature sender G83(3).
5. Lift up retaining clip (1).

6. Remove coolant hose from bottom left of radiator and allow coolant to drain out.
7. Lift up retaining clip (arrow).
8. Remove bottom right coolant hose from water radiator for charge air cooling circuit and drain off remaining coolant. [Note: The water used in the coolant mixture has a great influence on its effectiveness. Because the water quality differs from country to country and even region to region, the quality of the water to be used has been defined. Distilled water fulfils all requirements. For this reason, we recommend using distilled water when mixing coolant for topping up or replacing coolant.Use only coolant additives which conform with the Electronic Parts Catalogue. Other coolant additives may reduce corrosion protection substantially. The resulting damage could lead to loss of coolant and subsequent severe damage to the engine.The correct coolant solution ratio helps prevent damage from freezing and corrosion as well as scaling. Moreover, the boiling temperature is raised. Therefore, the cooling system must be filled all year round with coolant additive.Because of its higher boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.ONLY refractometer T10007A may be used for determining current anti-freeze value.Frost protection must be guaranteed down to -25°C as a minimum and, in countries with arctic conditions, down to approx. -36°C. Increasing the frost protection is permissible only if climatic conditions require stronger frost protection. It may only be increased, however, to a maximum of -48°C. Otherwise, the cooling effect of the coolant will be impaired.The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. Frost protection must be guaranteed to at least -25°C.Read off the frost protection value from the scale for the coolant additive being used.The temperature read off the refractometer T10007A equates to the »ice flocculation point«. Ice crystals can start forming in the coolant below this temperature.Do not reuse old coolant.Use only a water / coolant additive mixture as a slip agent for coolant hoses.]
9. Fit coolant hose with plug-in connector on bottom left of radiator until retaining clip (1) is heard to engage.
10. Fit electrical connector (2) on radiator outlet coolant temperature sender G83(3).
11. Push coolant hose onto bottom right of water radiator for charge air cooling circuit until retaining clip (arrow) is heard to engage.
12. Fill coolant reservoir of VAS 6096 with at least 10 litres of pre-mixed coolant in correct mixture ratio:
13. Screw adapter for cooling system testerV.A.G 1274/8 onto coolant expansion tank.
14. Place cooling system charge unitVAS 6096 on adapter V.A.G 1274/8.
15. Feed vent hose (1) into a small container (2). [Note: Exhaust air takes a slight quantity of coolant along with it; this should be collected.]
16. Close valves (A) and (B) (turn lever transverse to direction of flow to do this).
17. Connect hose (3) to compressed air.
18. Open valve (B); turn lever in direction of flow to do this.
19. Also briefly open valve (A) (turn lever in direction of flow to do this) so that hose on coolant expansion tank of cooling system charge unit VAS 6096 fills with coolant.
20. Close valve (A) again.
21. Leave valve (B) open for a further 2 minutes.
22. Close valve (B). [Note: If the needle does not reach the green zone, repeat the process.If the vacuum drops, the cooling system must be checked for leaks.]
23. Pull off compressed air hose.
24. Open valve (A).
25. Remove cooling system charge unitVAS 6096 from coolant expansion tank.
26. Fill coolant up to max. mark.
27. If fitted, remove noise insulation General body repairs, exterior66Noise insulation; Removing and installing noise insulation.
28. On vehicles with auxiliary heater, switch on auxiliary heater for about 30 seconds.
29. Set temperature regulator to "“HI”".
30. Switch off air conditioner compressor (press AC button).
31. Start engine and run at approx. 1500 rpm and up to maximum of 2800 rpm alternately until radiator fan starts.
32. Tighten cap of coolant expansion tank until it engages.
33. Switch off engine and let it cool off.
34. Check coolant level.
35. Screw adapter for cooling system testerV.A.G 1274/8 onto expansion tank again.
36. Use cooling system testerV.A.G 1274 B to apply a pressure of 1 bar to the cooling system.
37. Use tester to relieve pressure and remove cooling system testerV.A.G 1274 B.
38. With engine running, fill coolant up to approx. 5 mm above max. mark.

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