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Coolant pump, regulation of cooling system > < Draining and filling coolant|Filling

Golf Mk6

Checking cooling system for leaks
Checking cooling system for leaks
Special tools and workshop equipment required
   
t  Cooling system tester -V.A.G 1274 B-
  W00-10657
t  Adapter for cooling system tester -V.A.G 1274/8-
  W00-0703
t  Adapter for cooling system tester -V.A.G 1274/9-
Test prerequisite
l  Engine at operating temperature.
Test sequence:
  WARNING
Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution.
–  Open filler cap on coolant expansion tank.
–  Screw adapter for cooling system tester -V.A.G 1274/8- into coolant expansion tank.
–  Clamp connector -V.A.G 1274 B/1- into adapter for cooling system tester -V.A.G 1274/8-.
–  Join connection piece -V.A.G 1274 B/1- to cooling system tester -V.A.G 1274 B- using connecting hose supplied.
–  Using hand pump of tester, build up a pressure of approx. 1.0 bar.
  DANGER!
Risk of scalding! Before disconnecting cooling system tester -V.A.G 1274 B- from the connecting hose or connector -V.A.G 1274 B/1-, it is essential that the pressure is relieved. To do this, actuate pressure relief valve on cooling system tester -V.A.G 1274 B- until pressure gauge displays value of »0«.
If pressure drops:
–  Search for leaks within engine compartment and on underside of vehicle, remove noise insulation if required.
Check pressure relief valve in cap.
–  Screw cap into adapter for cooling system tester -V.A.G 1274/9-.
–  Clamp connector -V.A.G 1274 B/1- into adapter for cooling system tester -V.A.G 1274/9-.
–  Join connection piece -V.A.G 1274 B/1- to cooling system tester -V.A.G 1274 B- using connecting hose supplied.
–  Build up pressure using hand pump of cooling system tester.
–  Please see following table for max. pressure for respective vehicle/engine combination.
  W00-0564
 CFFACFFBCFFDCFHBCFHCCFGBCFJACLCACLLACLJA
Golf/Golf Plus/Touran1.4 bar.1.4 bar.---1.4 bar.1.4 bar.1.6 bar.1.4 bar.1.4 bar.------
Tiguan1.6 bar.1.6 bar.1.6 bar.------1.6 bar.---------1.6 bar.
Eos1.4 bar.1.4 bar.---------1.6 bar.------------
Scirocco---------1.4 bar.1.4 bar.1.6 bar.------------
Passat/CC1.4 bar.1.4 bar.---------1.6 bar.------1.6 bar.---

The pressure relief valve must not open.
If the pressure relief valve opens prematurely:
–  Renew cap.
–  Increase pressure according to table for respective vehicle/engine combination.
The pressure relief valve must open once the opening pressure is exceeded.
If the pressure relief valve does not open:
–  Renew cap.
   

Coolant pump, regulation of cooling system > < Draining and filling coolant|Filling