BMW M57 User Manual

DI Diesel Engines M57/M67 - Common Rail Sec. 4 P.4
Course contents/Background material
The force exerted by the spring is reduced by applying vacuum to
the control unit of the mount (12) so that a bypass now opens
permanently. The hydraulic fluid can now flow back and forth via a
larger cross section between the two chambers. The damping
characteristics of the mount are now softer.
The damping-controlled engine mount is designed to suit
specific types of engine:
M57:
M67:
© BMW AG, Service Training
Pin/pin mount
The left and right mounts differ due to the
asymmetrical arrangement of the engine mounts.
(Spring rate: left 180 N/mm / right 220 N/mm)
Pin/flange mount
The left and right mounts are inversely symmetrical
due to the symmetrical arrangement of the engine
mounts. (Spring rate: 350 N/mm)
The left mount features a stop bowl in order to restrict
engine movement when taking up torque.

BMW M57 Specifications

General

Fuel System	Common Rail Direct Injection
Valvetrain	DOHC, 4 valves per cylinder
Engine Block Material	Cast Iron
Cooling System	Liquid Cooled
Configuration	Inline
Bore	84.0 mm (M57D25, M57D30), 80.0 mm (M57TUD25), 84.0 mm (M57TUD30)
Torque Output	580 N⋅m (272–428 lb⋅ft)
Compression Ratio	18.0:1
Cylinder Head Material	Aluminium
Emissions Control	EGR, DPF (Diesel Particulate Filter)
Displacement	2.5 - 3.0 L
Stroke	90 mm
Bore x Stroke	84.0 mm x 90.0 mm (M57TUD30)