w108 motor mounts - Mercedes-Benz Forum

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post #1 of 25 (permalink) Old 04-20-2013, 12:46 PM Thread Starter
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Vehicle: 1970 280 sel, 1979 300sd, 1988 300sel
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Thumbs down w108 motor mounts

Removed my motor mounts this morning but can seem to align the new ones. One of the old motor mounts was badly collapsed. Now I'm wondering if I should have removed and replaced one at a time. What could of gone wrong? I need about 1 inch on the left side(when looking from the front of the car) and about 1/4 inch on the right. The problem is that if I align one side the other side gets completely thrown out of alignment. I tried positioning a round pointed screw driver thru the ARM opening and the motor mount opening to align it but I stopped because I was afraid I might ruin the motor mount threads.. I lowered the engine weight on the motor mounts to see if the weight will help aligning such openings....Any suggestions or recommendations greatly appreciated...
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post #2 of 25 (permalink) Old 04-20-2013, 12:53 PM Thread Starter
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I think I might have the wrong motor mounts. I have an m129 engine and not an m130. Would that make a difference. I just checked Autohaus and looked at the motor mounts for a 250se and a 280sel and they are different part numbers. Could that be my answer...? The motor mount alen bolts do fit and align with the body...Again, its the motor mount 19mm that wont align
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post #3 of 25 (permalink) Old 04-20-2013, 01:06 PM Thread Starter
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Old motor mount part number is 1082230112 with a MB symbol next to the number. The new ones have a Refrence number 1082230112 from Meyle. I will remove the new one to see what number is actually stamped on the rubber....I did notice that on one of the pictures of the motor mounts, the outside metal around the rubber is less than the other..
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post #4 of 25 (permalink) Old 04-20-2013, 02:01 PM
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I'm confused, your profile is wrong?

"1970 280 sel"

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post #5 of 25 (permalink) Old 04-20-2013, 03:42 PM Thread Starter
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I have a 1970 280 sel with an M129 engine and head
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post #6 of 25 (permalink) Old 04-20-2013, 03:49 PM
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250SE uses a large round mount. The base is perfectly round, save the tabs for the bolt holes. 280SEL mount is not round, but rather sort of squarish. They're very different. I suspect that finding mounts to accommodate a 250SE engine in a 280SEL was one of many challenges the installer had to overcome.

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post #7 of 25 (permalink) Old 04-20-2013, 04:25 PM Thread Starter
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mounts

Are the engine support arms the same length on both 280sel and 250se? Attached are pictures of the old and new motor mounts. The numbers are stamped on the rubber.
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post #8 of 25 (permalink) Old 04-20-2013, 04:38 PM Thread Starter
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The number stamped on the engine arm is 180 223 25 04 then followed by 280SE/280S R.
The other arm number, that holds to the fuel filter housing, is not visible from the top.
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post #9 of 25 (permalink) Old 04-20-2013, 04:39 PM
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Good question. Aluminum mount supports are the same one motor to the other, and your mounts, new and old, are clearly of the 280SEL variety. I think you'll just have to wrestle them in somehow.

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post #10 of 25 (permalink) Old 04-20-2013, 04:55 PM Thread Starter
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Thanks for looking into it. I just might have to force them in...It looks hard
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