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  #1  
Old 07-14-2011, 10:51 AM
Hit Man X's Avatar
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Thumbs up W126 M103 motor mounts...

Just swapped in a set of Meyle and the passenger side has already collapsed after about a week.

Is it possible to use the V8 mounts on this car? What about trans mount?

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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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  #2  
Old 07-14-2011, 11:18 AM
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Wouldn't your parts guy warrantee that part for you?
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  #3  
Old 07-14-2011, 11:26 AM
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Thumbs up

I am sure... but for the $20 the thing cost, I have to mail it back and will probably end up losing money on the deal as I will have to have the new one shipped to me again.

In the archives here someone mentioned using '90-91 350SD/L mounts. Has anyone tried this recently? Granted the cost is more, the extra weight of the 603 Diesel should warrant heavier duty mounts (I hope).

I need to also replace my trans mount... thoughts on just using the M103 version? The M116/7 mount differs from the 603 which differs from the M103. Great.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #4  
Old 07-14-2011, 11:37 AM
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You might also consider looking into the M103 4Matic motor mounts from the W124. The are significantly stronger than the regular M103 mounts.
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  #5  
Old 07-17-2011, 07:35 PM
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W124 ones do not work sadly.

Any input on the gasser or 350SDL mounts?
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #6  
Old 07-17-2011, 08:25 PM
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just put a set of Meyle motor mounts in my 560SEL yesterday.. i thought Meyle parts were decent parts. am i wrong?
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  #7  
Old 07-18-2011, 09:22 AM
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Quote:
Originally Posted by rsmartin View Post
just put a set of Meyle motor mounts in my 560SEL yesterday.. i thought Meyle parts were decent parts. am i wrong?


I usually have good luck with their parts also. The driver mount is still like new on the car, the passenger went flat within a few days.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #8  
Old 07-18-2011, 01:49 PM
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Sounds like a defective part. Unless your trans mount is so shot that the engine is still moving around.
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  #9  
Old 07-18-2011, 01:53 PM
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Obviously. But as said, it will cost me more to return it than it is worth.

SO, I am going dealer this time. But will 350SDL ones work or not? They have the proper bolt hole locations.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #10  
Old 07-18-2011, 07:31 PM
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That is actually a common problem. The heat from the exhaust kills the mount in no time flat. Usually aftermarket mounts die quickest, but even OE will fail similarly. I'd recommend to fashion a heat shield for whichever mount you install.
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  #11  
Old 07-18-2011, 07:35 PM
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It has the heatshield in place.....
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #12  
Old 07-18-2011, 10:19 PM
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That dinky thing doesn't get the job done, think bigger.
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
Tuned CIS ECU
4 ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #13  
Old 04-04-2017, 12:12 AM
xaliscomex
 
Join Date: Feb 2006
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w126 motor mounts

Quote:
Originally Posted by Hit Man X View Post
Just swapped in a set of Meyle and the passenger side has already collapsed after about a week.

Is it possible to use the V8 mounts on this car? What about trans mount?
So what did you end up going with, dealer or after market motor mounts?

I Replaced the mounts on my 1988 300sel last June 2016

The passenger side (right side) motor mount is completely collapsed and even though the mounts have a lifetime with FCP I have decided not to use Meyle again. The other motor mount option is made by FEBI.

I will get a quote from the Classic Center tomorrow and probably pay up the money to get quality.

I didn't even put 10k miles on the mounts.
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  #14  
Old 04-04-2017, 09:52 AM
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xaliscomex, best to buy genuine MB engine mounts, unless you prefer to replace the engine mounts on a routine basis.
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  #15  
Old 04-04-2017, 04:48 PM
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Thumbs up

OE seemed to be the only thing that lasts half decent on this car. OE were just put on around '05 when I acquired this thing in '07. I put OE on the car and they lasted a decent time. July '11 was around 276k on the car. Been flat for about 12-18 months. So it appears five years is all you will receive from motor mounts on a W126.024/5

Actually doing this again here, at 316k. Found one for $60.50 and one for $124.63, both new for OEM. I added an exhaust hanger to shim the bottom of the driver's side, seemed to help quite a bit. The mounts, when compressed, are about 0.5" too short from what I can tell and the downpipes will rest on that caster rod brace or the idler arm. Mine is on the idler arm as I dimpled the caster rod brace.

Head is coming off to replace head gasket again, maybe I will ceramic coat the manifolds while off and wrap the downpipes to contain heat. At least my '90 model does not have precats just resonators.

Meyle is garbage, I would not install anything from them on anything I own. They are in the same league as Uro. Febi is very close, but they are a repacker...so who knows what you will receive.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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