Author Topic: 6.9 engine mountings apparently back in production  (Read 2550 times)

daantjie

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6.9 engine mountings apparently back in production
« on: 28 March 2020, 02:36 PM »
Hi guys

A little birdie told me that the 6.9 engine mountings are again available.  Might be worth an email to the Classic Centre for those of you interested.

Cheers

Daniel
1977 450 SEL 6.9 - Astralsilber

slfan

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Re: 6.9 engine mountings apparently back in production
« Reply #1 on: 28 March 2020, 04:24 PM »

Thank you for the Heads-up!
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973

raueda1

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Re: 6.9 engine mountings apparently back in production
« Reply #2 on: 29 March 2020, 10:12 AM »
Just my luck!  I've got new 450sel mountings waiting to go in.  Anybody know how different they are?  and while we're on the subject of mounts, wouldn't it be nice if they brought back the strut mounts?
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

daantjie

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Re: 6.9 engine mountings apparently back in production
« Reply #3 on: 29 March 2020, 11:42 AM »
Dave I think they are of much harder rubber than the others.
Can you post up the part number and pricing from the Classic Centre?
Daniel
1977 450 SEL 6.9 - Astralsilber

UTn_boy

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Re: 6.9 engine mountings apparently back in production
« Reply #4 on: 29 March 2020, 04:04 PM »
I received an email from the Classic center, and if I remember correctly they were something like $105 each. 
1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex

TJ 450

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Re: 6.9 engine mountings apparently back in production
« Reply #5 on: 29 March 2020, 11:52 PM »
The rubber is much harder than the 450SEL ones... They would not last long.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

nathan

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Re: 6.9 engine mountings apparently back in production
« Reply #6 on: 30 March 2020, 05:52 AM »
if the dollar wasn't so rubbish, id get some spares...
6.9 79 #6436
6.9 79 #6290
6.9 79 #6181
6.9 78 #4764
6.9 77 #3096
6.9 76 #1741
6.9 76 #0902
6.9 75 #0018

ptashek

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Re: 6.9 engine mountings apparently back in production
« Reply #7 on: 30 March 2020, 09:47 AM »
Apart from the rubber being harder, are there any other differences? I was thinking of getting a spare 6.9 set for my standard 450. If they're stiffer, they won't collapse as quickly.
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1979 "Icon Gold" W116 450SE (history, resto)

UTn_boy

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Re: 6.9 engine mountings apparently back in production
« Reply #8 on: 30 March 2020, 01:57 PM »
The rubber is much harder than the 450SEL ones... They would not last long.

Tim

Just so you know, the standard M-117 engine mounts are up to the task, and do it quite well.  Back when the 6.9 mounts weren't available I had to buy M-117 mounts for my 6.9.  4 years  and 5,000 miles later they're still holding strong.  You must remember that the 6.9 and 4.5 don't have that much weight difference.  It's likely the additional torsional twisting force from the torque of the 6.9 that'll kill 4.5 mounts, but I don't have a heavy foot and I renewed the torque dampers when I did the work.  Even so, it killed me to put something on that wasn't right, but it turned out well. 

Lucas, I was thinking the same thing, but the only 4.5 cars I have now are W108 and W109 cars, which use a different mount.  Dad's 450sel already has new mounts on it, so I guess until they collapse I'll wait to buy spare 6.9 mounts. 
1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex

TJ 450

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Re: 6.9 engine mountings apparently back in production
« Reply #9 on: 31 March 2020, 01:46 AM »
That sounds about right, although it does surprise me that there wouldn't be a reasonable weight diffefence.

I think you will find that after 10 years they will be quite compressed and in need of replacement vs. the 6.9 ones which should hold up unless oil soaked. Still, they are a lot cheaper so it's probably justified.

You might find the softer mounts offer a smoother driving experience on the plus side.

Tim.
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

Mattr

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Re: 6.9 engine mountings apparently back in production
« Reply #10 on: 03 April 2020, 05:10 PM »
Can you define "reasonable weight difference" because all of my searching points to about a 150lb difference between a M117 and M100 long block. Combine that with the Biblically different torque, and I'd worry about the M117 motor mounts falling apart unless you've a light foot.

Oh, and my swb 6.9 has M117 mounts on it, and in ~4000 miles since the car was built, one of them has busted. I think driving plays a big factor: since I've a heavy foot and love my exhaust note.
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333


Wolfgang Germany

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Re: 6.9 engine mountings apparently back in production
« Reply #12 on: 04 April 2020, 02:51 PM »
this guy offers all things at least ten times too high  ::)

UTn_boy

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Re: 6.9 engine mountings apparently back in production
« Reply #13 on: 05 April 2020, 06:34 AM »
People like the fella selling the motor mounts for 1,200 Euros is a large part of why the hobby becomes unenjoyable, costly, and off putting to many.  I wish there were some way to put a cap on price for certain things, but even then how would that be determined?  Greed is an ugly thing, and no one wears it well. 
1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex

PosedgeClk

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Re: 6.9 engine mountings apparently back in production
« Reply #14 on: 07 April 2020, 08:51 AM »
There are a bunch of ways to look at it. When there was the price gouging going on in '05 during Katrina, it was next to impossible to buy gas in Georgia for a week or two due to something in the supply chain breaking for a state or two. Gas went up to whatever, maybe $8/gallon some places. I made a mental note of these stations and said that I would never shop there, so it comes back on them in the long run when they lose a fraction of their customer base. They did, however, have gas when no one else did, so if you needed to go a few miles down the road, spending $10 is better than running the tank dry and having the car towed. With the almost NLA parts, the price gouger may be the only one with the parts, but no one is buying them, and he may be sitting on them for decades. It is good in my opinion to not only know that there is a part out there somewhere but to know where that part is. Paying $1000 for a piece of rubber might be cheap to the guy who just put $100k into a $5k 6.9 for a transcon race and had to get that part at the last minute.

Anyway, I'm glad to be taking time on my project and having parts show up. The 6.9's motor has been rocking quite violently when I have been tuning the WUR, enough to be concerned with hitting a resonance mode and having the car rock/jump off the jackstands. I may order a set of mounts once business returns to normal. You guys are great.
1979 450SEL 6.9