BMW 3 (E46). Manual — part 36

Engine assembly, removing
and installing

Note:

The intake manifold must be removed
as described earlier to facilitate engine
assembly removal.

Remove cylinder head top cover:

Remove plastic trim covers
(arrows).

Remove cover hold down bolts
and lift off cover.

Drain engine coolant and remove
coolant hoses.

Remove expansion tank cap on
radiator.

Place a 3-gallon pail beneath
engine to capture coolant.

Remove coolant drain plug
located on exhaust side of cylinder
2 of engine block (arrow).

Drain radiator into a 3-gallon pail by
removing plastic drain plug completely
(arrow).

WARNING!

Use extreme caution when draining
and disposing of engine coolant.
Coolant is poisonous and lethal to

humans and pets. Pets are attracted
to coolant because of its sweet smell
and taste. Consult a veterinarian
immediately if coolant is ingested by
an animal.

Note:

Catch and dispose of drained coolant
according to local, state, and federal
laws.

Remove hoses from thermostat
housing by releasing locks (arrows).

On vehicles equipped with automatic
transmissions: Remove radiator cooling
fan and radiator as described in

170

Radiator and Cooling System

.

CAUTION!

32 mm radiator fan mounting nut has
left hand threads.

Detach coolant hose at rear left side of
engine above starter by releasing lock
(arrow).

Detach coolant hose at front left side of
engine by engine mount by releasing
lock (arrow).

-

Unbolt power steering fluid
reservoir and pull aside without
detaching hoses. Tie to fender
with cord or stiff wire.

Working at E-box at left rear of engine
compartment:

Detach engine electrical harness
connectors (arrows).

Lift off harness looms and lay over
engine.

-

Remove poly-ribbed drive belts.
Mark belt direction of rotation if
belts will be reused. See

020

Maintenance

.

-

All wheel drive models: Remove
front axle differential and output
shaft bearing pedestal. See

311

Front Axle Final Drive

.

-

Remove transmission from car.
See

230 Manual Transmission

or

240 Automatic Transmission

.

Note:

Detach automatic transmission cooler
lines from radiator, remove brackets
holding lines to side of engine, and
store lines in a clean environment.

Remove power steering pump:

Remove steering pump pulley.

Remove front and rear pump
mounting bolts (arrows).

Hang pump from body using stiff
wire.

Remove A/C compressor mounting
bolts (arrows) and A/C compressor
from its mounting bracket without
disconnecting, distorting, or deforming
any refrigerant lines. Hang from body
using stiff wire.

-

Remove windshield and headlight
washer reservoir:

Remove bolt on top of reservoir.

Lift tank and disconnect electrical
connections to pump and to
washer fluid level sensor.

Disconnect hoses to windshield
washer and headlight washer. Tilt
reservoir to prevent fluid from
leaking out.

Remove secondary air pump:

Remove hose at one-way valve
(A).

Remove bolts at support bracket
on strut tower (arrows).

Disconnect electrical harness from