'83 240D motor mount condition - PeachParts Mercedes-Benz Forum

DieselUte · #1 11-04-2021, 11:38 AM

I wanted to share the condition of the motor mounts on my 240D, from what I can tell the passenger side mount is original with the car and the driver side mount had been replaced at some point. Here is a side by side comparison of the old and the new. I bought the Lemforder mounts from FCP Euro. I was experiencing significant shaking at idle and wanted to see how much the old motor mounts were contributing.

vstech · #2 11-05-2021, 06:00 AM

Be sure and check the transmission mount as well. Replacing those two, changes the angle of everything, and stresses the likely original transmission mount. It’ll be FAR easier to change than the motor mounts were.

240D.Bill · #3 11-06-2021, 04:33 AM

So did it make a difference with the new mounts? I’m ready to tackle this as well. is there a significant difference between lemforder and febi-bilstein?

BirthdayBenz · #4 11-06-2021, 06:55 AM

Just think. This is every piece of rubber on these W123 chassis cars if you haven't yet yet replaced it.

Diesel911 · #5 11-06-2021, 10:24 AM

Quote:

Originally Posted by 240D.Bill

So did it make a difference with the new mounts? I’m ready to tackle this as well. is there a significant difference between lemforder and febi-bilstein?

The Motor Mounts from Mercedes are made by Phoenix in Turkey and have the Mercedes star, Mercedes part number and the Phoenix logo on them. Lemforder grinds off the Mercedes star but the rest of the info is there. There is a few threads where this is documented with pictures.

On 240D's (W123s) and I believe some of the non-turbo 617 engines the part number for one side is different from the other. But, there is threads where members have used 2 of the same Lemforder Motor Mounts for the 617 Turbo Engines with no apparent issues.

DieselUte · #6 11-08-2021, 02:30 PM

Quote:

Originally Posted by vstech

Be sure and check the transmission mount as well. Replacing those two, changes the angle of everything, and stresses the likely original transmission mount. It’ll be FAR easier to change than the motor mounts were.

Are you referring to the T shape mount that goes under the engine near the oil pan?

DieselUte · #7 11-08-2021, 02:31 PM

Quote:

Originally Posted by 240D.Bill

So did it make a difference with the new mounts? I’m ready to tackle this as well. is there a significant difference between lemforder and febi-bilstein?

Yes it has made a huge difference at idle on startup. I would highly recommend it if you experience any vibration on idle.

Junkman · #8 11-09-2021, 04:06 AM

IFIR, the new mounts will compress once installed and look almost like the old ones when the engine is pushing on them. I've never taken a new mount back out to see whether it rebounds to the original unsprung height.

vstech · #9 11-09-2021, 06:47 AM

Quote:

Originally Posted by DieselUte

Are you referring to the T shape mount that goes under the engine near the oil pan?

That is important also, but I am referring to the mount at the tail shaft of the transmission.

DieselUte · #10 11-09-2021, 11:27 AM

Quote:

Originally Posted by vstech

That is important also, but I am referring to the mount at the tail shaft of the transmission.

I will add that to the top of my list, thanks for the recommendation.

DieselUte · #11 11-09-2021, 11:29 AM

Quote:

Originally Posted by Junkman

IFIR, the new mounts will compress once installed and look almost like the old ones when the engine is pushing on them. I've never taken a new mount back out to see whether it rebounds to the original unsprung height.

I can see why you haven't taken them back out, it's a relief for me to have them in and now I want to enjoy them. Do I need to tighten the bolts now that I've driven it for a bit?

240D.Bill · #12 11-09-2021, 01:15 PM

Quote:

Originally Posted by DieselUte

I wanted to share the condition of the motor mounts on my 240D, from what I can tell the passenger side mount is original with the car and the driver side mount had been replaced at some point. Here is a side by side comparison of the old and the new. I bought the Lemforder mounts from FCP Euro. I was experiencing significant shaking at idle and wanted to see how much the old motor mounts were contributing.

I was unable to find lemforders on fcp euro. the part number i have for them is 1232411213

DieselUte · #13 11-09-2021, 01:19 PM

Those are the version 12 mounts, I bought the later version 30 mounts, try 123-241-30-13.

I have to admit I am not an expert though, Diesel911 is and he mentioned the two motor mounts are different. I couldn't source different part numbers for the two sides though so I ended up putting the same one on both sides. Whether you are okay with that or not is up to you.

240D.Bill · #14 11-09-2021, 01:26 PM

Also have a question: Is it possible to retrofit an early '77-'79 240D with the shock absorber motor mount? I can't see where the other end of the shock is mounted, presumably welded mount to the frame?

240D.Bill · #15 11-09-2021, 01:38 PM

Quote:

Originally Posted by DieselUte

Those are the version 12 mounts, I bought the later version 30 mounts, try 123-241-30-13.

I have to admit I am not an expert though, Diesel911 is and he mentioned the two motor mounts are different. I couldn't source different part numbers for the two sides though so I ended up putting the same one on both sides. Whether you are okay with that or not is up to you.

I'm pretty sure this is the part number(1152231704) for the shock mount(left side) but it looks like the shock is attached directly to the mount on one end and the engine on the other which makes sense.