Coolant Pump. Replacing (6-Cylinder Models) - BMW 5251 Service Manual

170-1 9
Radiator and Cooling System
Coolant pump
Remove thermostat housing fasteners (arrows) and remove
thermostat housing.
Installation is reverse of removal, noting the following:
-
Keep sealing faces clean and free of oil.
Use new sealing gasket.
Fill system with coolant. See Coolant, draining and fill-
i n g (V-8 models).
Tightening torques
Block drain plug to block 25 Nm (18 it-lb)
Coolant hose clamp (32
-
48
2. 5
Nm (22 in-lb)
mm hose diameter)
Radiator drain plug to radiator 2
-
3 Nm (18
-
27 In-lb)
Thermostat cover to
coolant pump
10
Nm
(89
in-lb)
Coolant pump, replacing (6-cylinder
models)
<
The engine coolant pump is mounted in the front of the en-
gine in the timing chain cover.
-
Drain cooling system as described earlier. See Coolant,
draining and filling (6-cylinder models).
WARNING-
Allow cooling system to cool before opening or draining sys-
tem.
-
Remove cooling fan and fan shroud. See Mechanical (vis-
cous clutch) cooling fan, removing and installing.
-
Remove coolant pump drive belt. See 020 Maintenance.
4
Remove coolant pump pulley bolts (arrows) and remove pul-
ley from pump.
-
Remove nuts retaining pump to engine block.
NOTE-
The coolant pump is mounted on studs and retained by nuts.