BMW 1989-1995 525i Service Manual page 69

ENG INE REMOVAL AND INSTALLATION
110-11
Fig . 27. Harness connectors to be disconnecteel.
16. Disconnect the electrical connector from the oil pres-
sure switch at the lelt rear corner of the cylinder head.
WARNING -
Fuel may be expel/ed under pressure. Do not
smoke or work near heaters or other lire hazards.
Keep
a
fire extinguisher handy. Before disconnect-
ing fuel hoses. wrap
a
cloth around fuel hoses to ab-
sorb any teaking fuet. Plug aI/ open fuel lines.
21 . Remove the access plugs and mounting nuts Irom the
fuel injection wiring harness bracket. See Fig. 29. Lilt
the bracket and harness off and set it aside.
20. Remove the large hose from the brake system vacuum
booster. Plug the opening in the vacuum booster.
Fig . 29. Wiring harness bracket cover plugs (arrow s).
D. Engine speed/refere nce
point sensor
E. Cylin der identifi cation sens or
17. Disconnect the tank venting hose from the charcoal
cannister on the left fender. Disconnect the wires from
the starter motor and the alternator. See 121 Battery,
Starter, Alternator.
A. Throttle switch
B. Coolant temperatu re sensor
C. Temperature gauge sender
18. Working beneath the intake manifold , disconnect the
electrical connectors for the oxygen sens or. the oil level
sensor, and the evaporative purge valve.
22. Working under the car, remove the nuts and ground
strap from the engine mounts.
19. Label and then remove the fuel supply line and the fuel
return line. See Fig. 28.
23. Install an engine lifting device. using the front and rear
lifting points. Carefully raise the engine out of Ihe car,
checking for any wiring, fuel lines, or mechanical parts
that might become snagged as the engine is removed.
[J Il 036
Installation is the reverse of removal. Engine mount tighten-
ing torques are listed below. Check that the guide pins in the
engine mounts correctly engage the alignment holes in the
subframe as the engine is lowered into place.
Adjust the tension of all V-belts. Change the engine oil and
filter and check all other fluid levels See 020 Maintenance
Program . Refill the cooling system as described in 170 Radi-
ator and Cooling System. Using new gaskets. install the
front exhaust pipe as described in 180 Exhaust System.
Fig. 28. Fuel return line (AI and fuel supply hne (B) .
ENGINE REMOVAL AND INSTALLA n ON