Spent an hour or so today trying to figure this out. The passenger side
mount is easily accessed, a 17mm bolt on top and two 14mm underneath.
I couldn't loosen the 17mm because there was very little room for
leveraging my wrench, the 14mm were no problem but they were no
consolation since I couldn't budge the top one. I sprayed a bit of
penetrating oil on the 17mm but there are no signs of corrosion. I will
try the whole thing again after a trip to the tool shop...
Wan-ning Tan wrote:
> Both are pretty straight forward. I have done these on W201 and W126,
> both diesel but assume W124 gasoline would be similar.
>
> I would recommend using the drive-on ramps under the front wheels.
> Remove the engine mount bolt (hex Allen key, 7 or 8mm, can't remember)
> from below. This is deep inside the cross-member so shine a flashlight
> into the hole and find it. Remove from both sides.
>
> Now come out under the car. Remove other bolts on the mount from top.
> The mount for diesel has two more bolts on top. I am not sure about
> mount for gas engine. If there is not enough clearance, you may have to
> go to the next step first.
>
> Use a wood (e.g. 2x4, or even a thick board) as buffer. Find a position
> to maximize the contact between oil pan and the wood. Place jack under
> the wood. Raise the engine 1-2". Do it slowly and keep checking if
> clearance is enough, especially at the front fan and the firewall. The
> pan is strong enough to be jacked up this way, though distributing the
> weight evenly is very important. Never jack directly into the pan or it
> will crack.
>
> Remove the engine mount. If there is heat shield, note how it seats.
>
> Installation is reverse.
>
> Transmission mount is similar. Use the jack/wood to support under the
> pan. Remove the cross member and the mount. Double check where the
> bolts/nuts go before you start. The two cars I worked have different
> trans mount layout.
>
>
> JSR wrote:
>> Hi,
>> Any tips on replacing the engine mounts and possibly the tranny mount
>> on a 1991 124?
>> Cheers,
>> J.
>
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