seat Workshop Repair Guides

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Coolant hose routing on vehicles with 2nd?heat exchanger > < Connecting auxiliary heater -D3W- to coolant circuit
Coolant hose routing
Coolant hose routing
  Note
The arrows in the illustration show the coolant flow direction.
   
1 - Coolant hose, return
q   From standard equipment heater heat exchanger
2 - Coolant hose, supply
q   To standard equipment heater heat exchanger
3 - Coolant hose, supply
q   From coolant distributor to auxiliary heater
4 - Coolant pipe, supply
5 - Coolant pipe, return
6 - Coolant hose, return
q   From auxiliary heater to coolant pipe
7 - Coolant hose, supply
q   From coolant pipe to auxiliary heater
8 - Heater unit
9 - Coolant hose
q   To engine
10 - Coolant hose, return
q   From coolant pipe to coolant distributor

   

Coolant hose routing on vehicles with 2nd?heat exchanger > < Connecting auxiliary heater -D3W- to coolant circuit