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Coolant pump, regulation of cooling system > < Draining and filling with coolant (Golf Plus, Eos, Scirocco, Golf, Touran, Tiguan, Golf Cabriolet)

Golf Mk6

Checking cooling system for leaks (Polo, Touran, Golf Plus, Eos, Tiguan, Scirocco, Golf, Golf Cabriolet)
   
Checking cooling system for leaks (Polo, Touran, Golf Plus, Eos, Tiguan, Scirocco, Golf, Golf Cabriolet)
Special tools and workshop equipment required
t  Cooling system tester -V.A.G 1274 B-
t  Adapter for cooling system tester -V.A.G 1274/8-
t  Adapter for cooling system tester -V.A.G 1274/9-

Test prerequisite
l  Engine at operating temperature.
Test procedure
  WARNING
Hot steam may escape when expansion tank is opened. Place rag over cap and open with caution.
–  Open cap on coolant expansion tank.
–  Screw adapter for cooling system tester -V.A.G 1274/8- onto 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.
–  Use hand pump on tester to create a pressure of about 1.0 bar.
  WARNING
Risk of scalding! Before disconnecting cooling system tester -V.A.G 1274 B- from connecting hose or connector -V.A.G 1274 B/1-, always relieve existing pressure. To do this, press pressure relief valve on cooling system tester -V.A.G 1274 B- until pressure gauge displays value of »0«.
If pressure drops:
–  Find leaks and rectify.
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.
–  Use hand pump on cooling system tester to create a pressure of max. 1.6 bar.
The pressure relief valve must not open.
If the pressure relief valve opens prematurely:
–  Renew sealing cap.
–  Increase pressure to over 1.6 bar.
The pressure relief valve must open.
If the pressure relief valve does not open:
–  Renew sealing cap.
   

Coolant pump, regulation of cooling system > < Draining and filling with coolant (Golf Plus, Eos, Scirocco, Golf, Touran, Tiguan, Golf Cabriolet)