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+--- Thread: W114 300D: engine replacement options (/showthread.php?tid=3484)
W114 300D: engine replacement options - scraf - 03-30-2012
Hi,
The engine stopped turning, going to be a tow start tomorrow or bust, done all the lubrication rigmarole, no idea why it stopped turned, died after a running about 45 seconds in very cold weather.
Cheapest option ( if the tow start doesn't work ) will be to get another motor that's been taken out of a rust bucket, however, if anyone could recommend a 300D out of a later model that would bolt right in, I'm all ears.
( would rather avoid anything involving electronics )
Thanks in advance,
- scraf
RE: W114 300D: engine replacement options - bad3gakk - 03-30-2012
In theory, all om617 should fit, all the way to the 1984/5 w123 w126..
However, small design differences can be found. Bolt wholes can be bigger/smaller in some places, flanges for coolant system can be different, and such details.. But this should not be difficult to work around..
Place the old engine on a pallet, and the new one right next to it...
Look for differences, and move the loose parts over from the old to the new... Or if in foubt, and you want to play super safe, strip the new engine, and move every external part from the old one over..
RE: W114 300D: engine replacement options - willbhere4u - 03-30-2012
There are probably pan differences
RE: W114 300D: engine replacement options - Hopfe - 10-18-2013
anyone tried to put a om603 or om606 in a w114 chassis? I saw one dude on youtube who put a 603 in it, had to change the suspension mounts a bit. anyone tried this out?
RE: W114 300D: engine replacement options - bricktron - 10-18-2013
hopfe, i haven't seen it, but they require adaptation in the W123 chassis as well, so i would assume it would take at least that much work.
RE: W114 300D: engine replacement options - Hopfe - 10-18-2013
okay, that's what I thought aswell. I was just feeling insecure about the length of the engine bay. but the 114 were built with the inline 6 gas engines aswell so i hope there might be no problem. gettin the chassis and engine on monday. have two donor cars to choose, one with a 603 and one with a 606 turbo engine. thanks for the quick help bricktron!
RE: W114 300D: engine replacement options - willbhere4u - 10-18-2013
om606 turbo for the win!
RE: W114 300D: engine replacement options - sassparilla_kid - 10-19-2013
The 617 found in w123 cars is different than found in the w115, the upper oil pan is different, lower oil pan is different, oil filter setup is different, and injection pump might also be different. That being said, I'm sure it's doable
RE: W114 300D: engine replacement options - mach4 - 10-19-2013
I put a 617.952 engine in my 380SL. This would be a very similar swap of a 617 into a 114 as they use the same front subframe. What I needed to do was swap in a "smooth" upper oil pan from an early 300D to gain clearance to the subframe. (It's also possible to shave the webbing on the later upper oil pan if you've got access to a mill or lots of patience with a burr and file) It was still too close so I raised the engine 1/2 inch using spacers and then dropped the subframe 1/2 inch also using spacers to keep the same relative position to the body and drivetrain. Even so, there were a couple of very minor mods to the subframe that needed to be done. I had to use an oil filter housing off an SD to clear the steering box on the 107 - not sure if you'd have the same problem, but that's the solution if you do. If you do go this route, make sure you get the oil cooler lines as well as they are different. You will definitely need to use the engine support arms off your current engine. Might have some issues with hoses - I just don't know, but those are relatively simple. And you might want to consider swapping in the 123 radiator and oil cooler while you're at it.
The other thing I would strongly recommend is to fill your motor mounts with urethane. This will prevent the mounts from collapsing and allowing the engine to contact the subframe. Even with the mods, it's a bit tighter than one might ideally like, so this is cheap insurance. (Make sure you use the right urethane - it's documented in the thread)
You might also have problems with the air cleaner depending on what engine you get. I had to build a custom air cleaner for mine.
You can check out my build thread if you like, to see how I dealt with the various fitment issues on my swap.
380SL Diesel Conversion Project
If you attempt to put a 60x engine in there, be prepared for some very, very serious mods and heavy engineering and major fabrication work. It can be done, but it's expensive, time consuming and requires serious commitment. Where the 617 is mostly bolt in, a 60x will be custom everything!
Good luck!
By the way, I've got about 28k miles on the swap including road trips of 3000 and 6000 miles.
RE: W114 300D: engine replacement options - sassparilla_kid - 10-19-2013
603 will fit
http://www.youtube.com/watch?v=aAOUoowU-vk
RE: W114 300D: engine replacement options - mach4 - 10-20-2013
(10-19-2013, 06:46 PM)sassparilla_kid 603 will fit
Sorry, I didn't mean to imply that the 60x engines wouldn't fit - they definitely will, as the video shows. I was only attempting to contrast the level of work needed as compared to a 617 swap which is far simpler.
Thanks for the video.
RE: W114 300D: engine replacement options - sassparilla_kid - 10-22-2013
(10-20-2013, 03:53 PM)mach4(10-19-2013, 06:46 PM)sassparilla_kid 603 will fit
Sorry, I didn't mean to imply that the 60x engines wouldn't fit - they definitely will, as the video shows. I was only attempting to contrast the level of work needed as compared to a 617 swap which is far simpler.
Thanks for the video.
Lol I was just trying to convince the OP to go through the extra work and get a 60x in there hahaa