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Coolant hose routing on vehicles with 2nd?heat exchanger > < Repairing auxiliary heater -D5W- Z (supplementary heater)

Leon Mk2

Connecting auxiliary heater -D5W- Z to coolant circuit
Connecting auxiliary heater -D5W- Z to coolant circuit
  WARNING
Danger of scalding injuries.
When the engine is warm, the coolant temperature may be above 100 °C. The cooling system is pressurised.
If necessary, release pressure and reduce temperature before carrying out repairs.
  Note
t  Bleed coolant circuit every time after opening it!
t  Complete hose routing → Rep. Gr.19
t  The arrows in the illustration show the coolant flow direction.
   
1 - Heat exchanger for heater
2 - Heater unit
3 - Auxiliary heat exchanger
4 - Expansion tank
5 - Coolant circulation pump -V50-
6 - Switch-off valve for supplementary heater
7 - ATF cooler
8 - Radiator
q   a = Bottom
q   b = Top
9 - Oil cooler
10 - Thermostat
11 - Coolant pump
12 - Cylinder head
13 - Throttle valve preheater
q   Only 2.0 l and 2.8 l engines

   

Coolant hose routing on vehicles with 2nd?heat exchanger > < Repairing auxiliary heater -D5W- Z (supplementary heater)