P20.00-0381-79
Shown on model 202
Coolant circuit
1 Coolant expansion cap, 1.4 bar opening pressure
2 Coolant expansion reservoir with silicagel tank
3 Radiator
4 Coolant thermostat (position engine at normal operating temperature)
5 Coolant pump
6 Oil-water heat exchanger (at timing case cover)
8 Heating system heat exchanger
14 Fuel cooler (only in model 202)
18 Low temperature cooler (only in model 202)
a Fuel feed from rail (only in model 202)
b Fuel return flow to fuel tank (only in model 202)
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A Coolant return flow
B Coolant feed
C Vent line
A6 Heater booster < 5° C and > 73° C
A6m1 Heating water pump
A31 Heating system delivery unit
A31/Y1 Left duovalve
A31/Y2 Right duovalve
D Bypass mode < 87° C (flow possible into passenger compartment)
E Mixed mode > 87° C and < 102° C (start of flow through radiator)
F Cooling mode > 102° C (thermostat opened, full flow through radiator)
S Heated windshield washer fluid reservoir
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