BMW 1989-1995 525i Service Manual page 213

RADIATOR AND COOLING SYSTEM
170-9
Fig. 13. Coolant pump being removed using two M 6 bol ls (arrow s).
Thread bolts in evenly to withdraw pump.
CAu n ON -
Failure to tighten pump mounting nuts evenly
could result in damage to pump and/or timing
chain cover.
NOTE-
For easier installation. coat coolant pump a ·ring with
a
thin layer of petroleum jelly.
9. The remainder of installation is reverse of removal. In-
stall coolant pump pulley. cooling fan, and fan shroud.
Fill system with coolant and bleed system as described
under Draining and Filling Coolant.
Tightening Torques
• Coolant pump to
timing chain cover 10 Nm (89 in-Ib)
• Coolant pump pulley
to coolant pump 10 Nm (89 in-Ib)
To replace coolant pump
(M60 engine)
1. Disconnect negative (-) cable from battery beneath
rear seat.
2. With engine cold. drain cooling system as described
earlier.
WARNfNG -
Allow cooling system to cool before opening
or
draining cooling system.
3. Remove fan clutch assembly and fan shroud as
de -
scribed under Cooling Fan Removal and Insta lla -
ti on.
NOTE -
The radiator cooling fan nut (32 mm wrench) has left-
hand threads.
4. Working from below car. remove engine splash guard
and then remove heat shields from front suspension
crossmembe r.
5. Loosen coolant pump pulley mounting bolts.
6. Remove engine drive belt as described in 020 Mainte-
nance Program.
7. Remove pulley from coolant pump.
8. Remove vibration damper from crankshaft hub. See
Fig. 14.
0011557
Fi g _14. Vibration damper mounting bolts (arrow s) on MOO engine.
9. Remove coolant hoses from coolant pump/thermostat
housing. Remove pump mounting bolts (qty. 6). See
Fig. 15.
10. Installation is reverse of removal. Tightening torques
are given below. Transfer thermostat from old pump us-
ing a new a -ring. Be sure pump aligns correctly with
dowels in timing chain cover during installation. Fill sys-
tem with coolant and bleed as described under Drain-
ing and Filling Coolant.
COOLANT PUMP REPLACEMENT