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Assembly overview - engine preheating (engine codes CCSA, CMXA) > < Removing and installing radiator

Golf Mk5

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  Cooling system tester adapter -V.A.G 1274/8-
  W00-0703
t  Cooling system tester adapter -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 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-.
  W00-0564
–  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.
  DANGER!
Risk of scalding! Before disconnecting cooling system tester -V.A.G 1274 B- from connecting hose or connector -V.A.G 1274 B/1-, relieve existing pressure under all circumstances. 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.
Checking pressure relief valve in filler 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-.
  A19-10645
–  Join connection piece -V.A.G 1274 B/1- to cooling system tester -V.A.G 1274 B- using connecting hose supplied.
–  Operate hand pump.
l  The pressure relief valve should open at a pressure of 1.4 …1.6 bar.
  A19-10748

Assembly overview - engine preheating (engine codes CCSA, CMXA) > < Removing and installing radiator