Coolant Circuit

NOTE: Image may not show all cooling system hoses.

1- Rear heater core
2- Coolant return hose
(from rear heater core to coolant pipe)
3- Coolant supply hose
(from coolant pipe to rear heater core)
4- Coolant pipe
5- Coolant return hose
(from coolant pipe to auxiliary heater valve -N172-)
6- Coolant supply hose
(from T piece to coolant pipe)
7- Coolant supply hose
(from T piece to T piece)
8- T piece
9- Coolant supply hose
(from T piece to T piece)
10- T piece
11- Coolant return hose
(from T piece to coolant cut-off valve)
12- Coolant cut-off valve
13- Coolant pump -V50-
(for after-run)
14- Coolant return hose
(from coolant cut-off valve to engine)
15- Coolant supply hose
(from engine to coolant pump -V50-)
16- Coolant supply hose
(from engine to T piece)
17- Engine
18- Coolant return hose
(from auxiliary heater valve -N172- to engine)
19- Auxiliary heater valve -N172-
(for rear heater)
20- Coolant return hose
(from T piece to front heater core)
21- Bleeder screw
22- Coolant return hose
(from front heater core to auxiliary heater valve -N172-)
23- Front heater core
24- T piece