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  #16  
Old 07-08-2018, 06:49 PM
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I have a w114 in my shop right now with the engine removed, because we were planning to put a v8 in it. And right next to it is the M117 5.6L engine. I can tell you that the engine will not fit in the engine bay, unless you make custom headers with about 1.5" pipe diameter, and extremely tight bends, and they might still rub the frame rails.

It can be done, if we were willing to cut sheet metal, but this car is extremely nice and we wanted to leave the body/frame original, so we aborted. Even with hacking the metal it would have been tight. We considered an M116 because it's narrower, but it would still need custom headers. Mind you, custom headers means small pipes with tight bends, which means low performance, and the M116s aren't very powerful anyway, so it became pointless. Then we considered the M113, but even those are too wide for the W114, so same problem. Before you ask, the M119 is wider than them all.

The W114 can really only take inline engines or pushrod V8s unless you want to modify the frame. I'm happy to share my measurements if you're interested.

For our car, we decided to keep the stock M110, go with euro cams and headers, TBI, and MS for a start and perhaps more in the future. We probably won't be satisfied with the power but it will be a good start. If you're not a purist, I'd recommend the ford v8. I'm not a total purist, but I wanted to stick with a Mercedes engine with this W114 as well as my other projects.
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'82 300TD - 345k miles, 3rd row seat deleted, w126 leather front seats, w126 front brakes, 2.47 final drive, burlwood shifter, electric locks w/ keyless entry, 16x7" wheels
'77 6.9 - getting some engine work done
'75 280S - W124 electric front seats, otherwise stock
'87 Porsche 944 turbo
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  #17  
Old 07-08-2018, 07:26 PM
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Quote:
Originally Posted by Admiral Ahani View Post
I have a w114 in my shop right now with the engine removed, because we were planning to put a v8 in it. And right next to it is the M117 5.6L engine. I can tell you that the engine will not fit in the engine bay, unless you make custom headers with about 1.5" pipe diameter, and extremely tight bends, and they might still rub the frame rails.

It can be done, if we were willing to cut sheet metal, but this car is extremely nice and we wanted to leave the body/frame original, so we aborted. Even with hacking the metal it would have been tight. We considered an M116 because it's narrower, but it would still need custom headers. Mind you, custom headers means small pipes with tight bends, which means low performance, and the M116s aren't very powerful anyway, so it became pointless. Then we considered the M113, but even those are too wide for the W114, so same problem. Before you ask, the M119 is wider than them all.

The W114 can really only take inline engines or pushrod V8s unless you want to modify the frame. I'm happy to share my measurements if you're interested.

For our car, we decided to keep the stock M110, go with euro cams and headers, TBI, and MS for a start and perhaps more in the future. We probably won't be satisfied with the power but it will be a good start. If you're not a purist, I'd recommend the ford v8. I'm not a total purist, but I wanted to stick with a Mercedes engine with this W114 as well as my other projects.
Thank you, I have found bits of information on the web. None of it made me feel confident enough to go that route. According to one builder using all R107 parts makes it "almost" a drop-in..... WTF does "ALMOST" mean?

I'm thinking it still means opening up a can of worms.

Member coasttocoast pointed me in a different direction - Ford 2.3L Ecoboost inline 4! Small, powerful, fuel efficient and probably 100lbs lighter than the M110. Any late model Mustang could be a donor IF that combination fits into the W114 engine bay. After the summer I'll look into this seriously.
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  #18  
Old 07-08-2018, 08:34 PM
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A.L.M.O.S.T.

Another Laborious Mistake Others Shouldn't Try.
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  #19  
Old 07-08-2018, 11:55 PM
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Originally Posted by Mike D View Post
A.L.M.O.S.T.

Another Laborious Mistake Others Shouldn't Try.
That makes sense....
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  #20  
Old 07-09-2018, 08:49 PM
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Originally Posted by Don Andres View Post
Thank you, I have found bits of information on the web. None of it made me feel confident enough to go that route. According to one builder using all R107 parts makes it "almost" a drop-in..... WTF does "ALMOST" mean?

I'm thinking it still means opening up a can of worms.

Member coasttocoast pointed me in a different direction - Ford 2.3L Ecoboost inline 4! Small, powerful, fuel efficient and probably 100lbs lighter than the M110. Any late model Mustang could be a donor IF that combination fits into the W114 engine bay. After the summer I'll look into this seriously.
I acquired R107 headers per what I read online. They don't give you enough room to get the M117 into the W114.

I also acquired 380SE (M116) headers. These and the R107 450SL headers are both smaller than the 560SEL headers, but not by enough, not even close. So anyone who says R107 parts are all you need to do this swap is just speculating and has not actually done it.

An inline 4 should be able to fit. You need to figure out what transmission you're going to use, whether it fits in the tunnel, and where the starter will be located and whether that will hit anything. I think those would be the main worries. Good luck.
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'82 300TD - 345k miles, 3rd row seat deleted, w126 leather front seats, w126 front brakes, 2.47 final drive, burlwood shifter, electric locks w/ keyless entry, 16x7" wheels
'77 6.9 - getting some engine work done
'75 280S - W124 electric front seats, otherwise stock
'87 Porsche 944 turbo
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  #21  
Old 07-09-2018, 10:35 PM
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Join Date: Jun 2018
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Quote:
Originally Posted by Admiral Ahani View Post
I acquired R107 headers per what I read online. They don't give you enough room to get the M117 into the W114.

I also acquired 380SE (M116) headers. These and the R107 450SL headers are both smaller than the 560SEL headers, but not by enough, not even close. So anyone who says R107 parts are all you need to do this swap is just speculating and has not actually done it.

An inline 4 should be able to fit. You need to figure out what transmission you're going to use, whether it fits in the tunnel, and where the starter will be located and whether that will hit anything. I think those would be the main worries. Good luck.
So much for 'almost drop-in'.....

Thanks for confirming this! Some cut into the frame rails to make it fit but still requires custom headers. Too tight for my taste. Check out this thread I found:

1976 Mercedes 240D M117 5.5 liter | Retro Rides
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  #22  
Old 07-13-2018, 04:04 AM
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I love that thread and I love that guy's project! Every time I see it again, I want to try it again myself, but every time I get back to my shop and see the car, I just don't want to go through with the super tight headers and solid engine mounts (to prevent engine rock).

Today I heard a car drive by, and it had a slight buzz and a turbo whistle. I looked, and unexpectedly it was a Mustang! So if even the pony cars are setting aside V8s for turbo-4s, then why not classic car guys too.
__________________
'82 300TD - 345k miles, 3rd row seat deleted, w126 leather front seats, w126 front brakes, 2.47 final drive, burlwood shifter, electric locks w/ keyless entry, 16x7" wheels
'77 6.9 - getting some engine work done
'75 280S - W124 electric front seats, otherwise stock
'87 Porsche 944 turbo
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  #23  
Old 07-13-2018, 05:16 AM
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Join Date: Jun 2018
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Quote:
Originally Posted by Admiral Ahani View Post
I love that thread and I love that guy's project! Every time I see it again, I want to try it again myself, but every time I get back to my shop and see the car, I just don't want to go through with the super tight headers and solid engine mounts (to prevent engine rock).

Today I heard a car drive by, and it had a slight buzz and a turbo whistle. I looked, and unexpectedly it was a Mustang! So if even the pony cars are setting aside V8s for turbo-4s, then why not classic car guys too.
Width might work but starter is on the driver side and might interfere with the steering box.



This is the 2.0L ecoboost. As far as I know the 2.3L is only different in stroke.
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  #24  
Old 07-13-2018, 01:39 PM
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Oil pan may not work with the sub frame....

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