Mercedes M180/M114 engine block question - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 09-06-2016, 01:31 AM Thread Starter
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Date registered: Sep 2016
Vehicle: 1974 Mercedes Benz 230.6 W114 auto, pea green, man. sunroof, H&R springs, 16" bbs mahle, weber kit
Location: Trondheim, Norway
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Mercedes M180/M114 engine block question

Hello forum!
I am in the prosess of rebuilding a 230.6 M180 engine for my W114. I already have the weber kit and a professional rebuild head for the motor build. But I found wear in the cylinder walls. To get this fixed in a machine shop here in Norway is very expensive. And the price of new pistons is also pretty high.

Now I found a used 250CE M114 engine at a good price, and I am wondering if I can use the block from this engine with my M180 head? The bore seams to be the same, but longer stroke on the W114?
Is this basically the same engine? Buy or not? I want to get my pea green W114 on the road soon....
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post #2 of 7 (permalink) Old 09-06-2016, 02:50 AM Thread Starter
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Some pictures of my W114...

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post #3 of 7 (permalink) Old 09-18-2016, 07:05 AM Thread Starter
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Nobody knows?
Could it be better to get a Mercedes (280se) M110.98 engine? With auto trans.
I found one that I could buy at a totally different price, but the seller says
its been serviced 15000km ago, and the trans 30000 ago.

Is this the mechanical injection one?
And what about fitment in the Series 2 W114?
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post #4 of 7 (permalink) Old 09-18-2016, 07:17 AM
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Mercedes M180/M114 engine block question

Since you have a 1974, the m110 DOHC should fit. I am a huge fan of the m110 engines.

I don't know the m114. I believe the m180 family of engines started with the m180 and ended with the m130, but I don't know the models between.

Personally, I hate carbs, and love the simplicity of k-jet engines. It seems 185 hp k-jet m110 are plentiful, produced from 1976/77 to 1985. If I had a 1973-76 w114/115 with engine issues, I'm pretty confident I would be putting in an m110. I do understand there are many other great engines out there though.

Oh... If taking an engine from a w116 or w126, be sure to watch the oil pan. The r/c107 shared the same subframe as the w114/115 though. So the oil pan from a 107 would be fine.

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post #5 of 7 (permalink) Old 09-18-2016, 11:14 PM Thread Starter
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Thanks a lot!

Will the oil pan from w116 and w126 not fit at all or is it a tight fit?
And will the oil pan from w107 fit the S class motor? I think its a S class motor
I have found. I also think its the mechanical injection so this sounds good.

What do you think I can get for a rebuild head, cam cover, new head gasket, and intake with new webers?
This engine is a little pricey, so I have to sell some parts first.
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post #6 of 7 (permalink) Old 09-19-2016, 05:21 AM
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Well, one thing I do know regarding the w116 vs 107 (107 has the same subframe as 114/115) is that I parted a car that had an engine with a 116 oil pan installed and parts of the subframe had been cut out to make it fit. So I'm pretty confident that you do not want to use a w116 oil pan on a 114/115/107 subframe.

I don't believe that you should look at the motors as an "S class motor".

I will try to find time to look in the EPC to determine what oil pan is used with the m110, m180, and m130 motors. I've been told by someone that the blocks of those motors are very similar. So it's possible that the oil pans could maybe be the same, but really it's just a long shot.

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post #7 of 7 (permalink) Old 09-19-2016, 10:35 AM
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Ok. I looked at the EPC, and it looks like w114/115, r/c107, w116, w123, and w126 all share that oil pan. I think the g-wagon m110 might use a different oil pan, but I doubt you'd be ripping apart a g-wagon to save a w114/115 anyway.

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