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Testing coolant thermostat > < Removing and installing coolant regulator for vehicles manufactured up to 08.09

Octavia Mk2

Removing and installing 4/2 way valve with coolant regulator for vehicles manufactured as of 08.09
Removing and installing 4/2 way valve with coolant regulator for vehicles manufactured as of 08.09
Special tools and workshop equipment required
t  Pliers for spring strap clamps
t  Universal joint socket wrench XZN 8 -T10445-
  Note
The coolant regulator is located inside the 4/2 way valve and cannot be replaced separately.
–  Drain coolant → Chapter.
–  Remove alternator → Electrical System; Rep. gr.27.
   
–  Release screws -arrows-.
–  Expose coolant hose -3-.
–  Loosen hose clamp -2-.
–  Disconnect plug -1- at the charge pressure sender -G31- and remove the right charge air pipe.
  S13-0705
–  Disconnect the plug -3- from the throttle valve control unit -J338-.
–  Release the screw -arrow- on the oil dipstick guide pipe.
  N15-10409
–  Release screws -arrows- and remove throttle valve control unit -J338-.
  A23-10150
–  Separate the coolant hoses from the connection fittings -A,B and D-.
–  Unscrew fixing screws -3- for 4/2 way valve with coolant regulator -2-.
  N19-10386
–  Release screw -2-.
–  Remove the wiring loom between the front coolant pipe and the oil filter holder and place it to the side.
–  Remove the 4/2 way valve with coolant regulator from the cylinder block and then pull it to the left in order to separate the connection fitting -C- from the front coolant pipe.
Install
Installation is performed in the reverse order, pay attention to the following points:
  Note
t  Replace O-ring.
t  Hose connections as well as charge air pipes and charge air hoses must be free of oil and grease before being installed.
t  Observe the instructions for installing the charge air hoses → Chapter.
t  Secure all hose connections with prescribed hose clamps → Electronic Catalogue of Original Parts.
  A19-10998
–  First of all position the 4/2 way valve with coolant regulator with the connection fitting -C- on the front coolant pipe and subsequently insert it into the cylinder block.
–  Screw in fixing screws -3- for 4/2 way valve with coolant regulator -2-.
t  Tightening torque: 15 Nm
–  Connect the coolant hoses to the connection fittings -A, B and D-.
–  Tighten the screw of the front coolant pipe behind the oil filter holder using the universal joint socket wrench XZN 8 -T10445-. Tightening torque: 10 Nm
–  Install alternator → Electrical System; Rep. gr.27.
–  Install the throttle valve control unit -J338- → Chapter.
–  Top up coolant → Chapter.
  N19-10386

Testing coolant thermostat > < Removing and installing coolant regulator for vehicles manufactured up to 08.09