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Old 04-13-2019, 01:16 PM
Bad Benzo's Avatar
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Join Date: Feb 2016
Location: Rochester, NY
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Advice on removing a M117 out of a W116 450SE

I am going to remove a low mileage M117 out of a 450SE for an upcoming project. My original plan was to put this motor into a S123, but I sourced a similarly low mileage 5.0L M117 out of a W126 and changed my plans.

Because I am insane, my new plan is to put the M117 into my W114 280 sedan. Recently, my car was involved in a low-speed accident that necessitates removing the engine for a frame repair. While I was milling around the garage trying to think about what to do next, I figured, "why not make things more complicated for myself and put in a V8?" This is no easy feat, I know, but I've seen them in other /8 cars, so I know it is possible. It's not a direct fit, but it can be made to fit; we can argue about it in a new thread in a couple weeks.

So on to the questions:

The donor car is in the back lot of a heavy truck repair station in a rural area about 30 minutes from my home shop. They have graciously offered to lend me an engine hoist for the day, but I will need to bring all my own tools. This particular car has the front radiator support and a portion of the inner fender removed, so access is pretty good. I imagine I will need your standard fare for engine removal; wrenches, sockets, breaker bars, jack stands, etc. We will have a Sawzall and angle grinder to remove some of the body panels for my friend's 300SD, but is there anything else I should think about bringing?

Here is my other question: Since this is going into my W114, my understanding is that the rear differential gears are different, although the diffs themselves are interchangeable. I think the diff in my W114 is something like 3.92, while the W116 is either 3.06 or 3.07. Does this sound about right? Are there any considerations or special tools needed to remove the rear diff?

That's it for now, thanks in advance!
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1966 Volvo 122S Wagon "Some Volvo"
1969 Volvo 1800S
1976 Mercedes-Benz W114 280 Sedan "Bad Benzo"
1996 Volvo 960 Wagon
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  #2  
Old 04-13-2019, 06:25 PM
Tony H's Avatar
Tony
 
Join Date: Oct 2005
Location: Bandon, Oregon
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Check out this thread:

M117 into W114 engine swap?

I know this does not answer your question but food for thought.
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111 280SE 3.5 Coupe
Manual transmission

Past cars:
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Old 04-13-2019, 10:07 PM
Bad Benzo's Avatar
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Quote:
Originally Posted by Tony H View Post
Check out this thread:

M117 into W114 engine swap?

I know this does not answer your question but food for thought.
Thanks Tony, I've seen that thread before and I am undeterred. This successful W115 - M117 build thread is more or less the direction I am headed in: 1976 Mercedes 240D M117 5.5 liter | Retro Rides

The reason why this project appeals to me is that the motor in question and any Mercedes parts I would need for this swap are entirely free. Things like the Painless wiring harness, Megasquirt, modifications to the intake manifold, driveshaft, bell housing, and purchase of a Getrag 265 have already been factored in. I know it will be an enormous labor of love and an considerable time investment, but it will be worth it to me.

FWIW, my stepbrother fit a LS1 into his 1965 Volvo 122S which was no easy feat; it required complete reworking of the firewall, floor, transmission tunnel, steering gear, rear axle, and suspension components. I think I can find a way to make a M117 fit in a W114, especially using the thread linked above as a reference.

I plan on outlining my entire plan in a dedicated build thread in the coming weeks, as there are several other exciting aspects that I have not mentioned here.
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1966 Volvo 122S Wagon "Some Volvo"
1969 Volvo 1800S
1976 Mercedes-Benz W114 280 Sedan "Bad Benzo"
1996 Volvo 960 Wagon
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Old 04-14-2019, 02:24 PM
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Tony
 
Join Date: Oct 2005
Location: Bandon, Oregon
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Sounds interesting-looking forward to progress.
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111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
64' Jaguar XKE Roadster
57' Oval Window VW
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