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.
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