BMW 3 (E46). Manual — part 28

100-1

General

This section covers system descriptions
and general information on engines
and engine management systems. Also
covered is basic engine
troubleshooting.

For specific repair procedures, refer to
the appropriate repair group:

110 Engine Removal and

Installation

113 Cylinder Head Removal

and Installation

116 Cylinder Head and

Valvetrain

117 Camshaft Timing Chains

119 Lubrication System

120 Ignition System

130 Fuel Injection

170 Radiator and Cooling

System

Engine

M52 TU 6-cylinder engine is a technical
update (hence the designation TU) of
the earlier 2.8 liter M52 engine. The
main `technical update' for M52 TU was
the addition of double VANOS.

In model year 2001, the M54 (2.5 and

3.0 liter) engines were introduced. This
engine incorporates all the technical
features of the M52 TU engines with
addition of fully electronic throttle
control and enhanced emission
controls.

Table a. Engine specifications

lists

engine specifications for the vehicles
covered by this manual.

Table a. Engine specifications

Model
year

Engine
code

No. of
cylinders

Displacement
cc (cu. in.)

Bore/
stroke

Compression
ratio

Torque
lb-ft/rpm

Horsepower
Hp/rpm

323i
1999 -
2000

M52
TU B25

6

2494 (152.2)

84
mm
(3.307
in.)
75
mm
(2.953
in.)

10.5: 1

181/3,500 170/5,500

325i/Ci/xi
2001

M54
B25

6

2494 (152.2)

84
mm
(3.307
in.)
75
mm
(2.953
in.)

10.5: 1

175/3,500 184/6,000

328i/Ci
1999 -
2000

M52
TU B28

6

2793 (170.4)

84
mm
(3.307
in.)
84
mm
(3.307
in.)

10.2: 1

206/3,500 193/5,500

330i/Ci/xi
2001

M54
B30

6

2979.3 (181.8)

84
mm
(3.307
in.)
89.6
mm
(3.528

10.2: 1

214/3,500 225/5,900

Model
year

Engine
code

No. of
cylinders

Displacement
cc (cu. in.)

Bore/
stroke

Compression
ratio

Torque
lb-ft/rpm

Horsepower
Hp/rpm

in.)

Torque/power graphs

M52 TU 2.5 liter

M52 TU 2.8 liter

M54 2.5 liter

M54 3.0 liter