Coolant Pump. Replacing (V-8 Models) - BMW 5251 Service Manual

.,"
--
Radiator and Cooling System
- - -
1
insert two M6 screws (arrows) in tapped bores and tighten
uniformly until pump is free from timing chain cover (thermo-
stat and hoses have been removed for purposes of visual
clarity).
Installation is reverse of removal, noting the following:
Be sure to replace sealing O-ring and gaskets.
Coat O-ring with water-based lubricant during installation.
Refill with coolant. See Coolant, draining and filling (6-
cylinder models).
Tightening torques
-
Coolant pump to timing chain
10
Nm (89 in-lb)
cover
Coolant pump pulley to coolant
10
Nm (89
in-lb
pump
Engine block drain plug to block
25
Nm
(1 8
It-lb)
Radiator drain plug to radiator
2 -
3 Nm ( I 8
-
27
in-lb)
Coolant pump, replacing
(V-8
models)
I
1
<
The engine coolant pump is mounted in the front of the en-
gine in ; h e timing chain cover.
1. Thermostat housing
2. Thermostat
3. Thermostat sealing O-ring
4. Water pump
5. Water pump gasket
-
Drain cooling system. See Coolant, draining and filling (V-
8 models).
-
Remove cooling fan and fan shroud. See Mechanical (vis-
cous clutch) cooling fan, removing and installing.
-
Remove engine drive belts: See 020 Maintenance.
NOTE-
Mark direction of drive belt rotation i f reusing belt,
-
Remove vibration dampener. See 117 Camshaft and Tim-
i n g Chain.
-
Disconnect mass air flow (MAF) sensor electrical harness
connector. Remove air intake duct together with MAF sensor.
-
Disconnect coolant hoses from thermostat housing and cool-
ant pump housing.