I'm replacing engine mounts on 240D that has an adjustable "front engine
stop".
Found the following on the 'net:
Installing New Engine Mounts Made Easy...
by: Omar Sidak
There are slight differences between model years and types of transmissions
so please keep this in mind.
The 1980 W123 body 240D with a 4 speed manual transmission have 4 rubber
pieces that support the engine and transmission. The consist of the two
front engine mounts, the transmission mount and the engine stop. When
looking at the engine from the top you will see the two mounts located under
the IP and under the air cleaner housing, the engine stop will be located
between the oil pan and front cross member. NOTE the engine stop is only on
cars not equipped with engine shocks. The transmission mount is located on
the bottom side about half way back the transmission. After about 100K miles
all the rubber mounting points will be shot and should be checked out, if
they are bad then they should be replaced to reduce engine vibrations and
restore that Mercedes feel.
STEPS.
1. Jack up front of car and place on jack stands. Disconnect the negative
cable from the battery
2. Locate the engine stop and release the bolt holding it, this will be a
19mm bolt that goes through the cross member. If the area is oily the odds
are that the engine stop is history so have a spare one handy.
3. Turn the steering wheel to the right or left stop, and remove the engine
mount bolt (8mm) from the bottom.
4. Place a piece of wood between the oil pan and a jack and raise the engine
as much as you can, make sure that you have allowed room for the cooling fan
to raise with the engine.
5. Remove the heat shield and remove the Two 5mm bolts from the top of the
mount. Put new mount into place, and reverse the procedure.
6. If the engine stop needs to be replaced remove the two 13mm screws that
hold the stop bracket to the bottom of the lower oil pan.
7. Clean the area up and disassemble the bracket and install the new engine
stop.
Make sure all bolts are tight and hook the battery back up (note this is a
good time to check for rust in the battery area) start the engine and take
it for a good 15 minute drive. Jack the car back up and loosen the 19mm
engine stop bolt and then retorque.
-----------------------------------------------------
Since the front engine stop seems to adjust the "tilt" of the engine in
relation
to the transmission, I would guess that the new transmission mount should be
replaced before taking the drive and re-adjusting the front engine stop
(mount).
Am I wrong about this? Is Sidak correct?
(The MB manual says to "make" a gauge for setting the front engine stop and
gives
dimensions. I'd rather not have to do that.)
Thanks,
Gerry
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