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  #1  
Old 03-20-2017, 01:09 AM
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dear slow drivers in germany,

if the ad is to be believed it may be the best deal ever on "overhauled" OM615.940s.

Mercedes Benz 200d Engines for Sale, discounted For Sale (1980) on Car And Classic UK [C423952]

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  #2  
Old 03-20-2017, 01:22 AM
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Interesting !
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Old 03-21-2017, 10:12 AM
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This may be a dumb question, but how could you tell they were 615.940? I know the ad says 1980 w123, but I was surprised by a few things. I thought MB was able to do away with the butterfly valve on the air intake by the time the w123 cars came along. I also thought that the injection pump oil path was integrated with the rest of the car's oil for the w123 cars. The IPs on those engines for sale have their own small oil supply and little red cap. Anyway, I am surprised how much is similar between those engines and my 1968 OM615, so I was just trying to be sure which engine they are selling.
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  #4  
Old 03-21-2017, 10:52 AM
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I don't recall ever seeing a OM615 in the W123 chassis here in the states and it was never offered by MB for U.S. sales. The poster is in the U.K. so the OM615 was still an option. Why, I don't know but it may have had something to do with the way the "Use Tax" was calculated. Perhaps one of our U.K. members can enlighten us.
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Last edited by Mike D; 03-21-2017 at 11:03 AM.
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  #5  
Old 03-21-2017, 01:41 PM
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Quote:
Originally Posted by Shortsguy1 View Post
This may be a dumb question, but how could you tell they were 615.940?
hi, you have a better command of the details than i do. that was just my best guess after glancing at wikipedia.
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Old 03-21-2017, 01:51 PM
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Quote:
Originally Posted by Mike D View Post
I don't recall ever seeing a OM615 in the W123 chassis here in the states and it was never offered by MB for U.S. sales. The poster is in the U.K. so the OM615 was still an option. Why, I don't know but it may have had something to do with the way the "Use Tax" was calculated. Perhaps one of our U.K. members can enlighten us.
good point on the W123 application. i'm not sure which version of the engine it is really.

U.S. market engines are always the bigger ones. the US was and is obsessed with displacement, automatic transmissions, and air conditioning. europe seemingly had other interests like cloth seats, more emergency equipment, and higher fuel taxes.
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Old 03-21-2017, 01:57 PM
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At one time the displacement of some engines was decreased due to Government tax considerations...
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Old 03-21-2017, 03:28 PM
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Originally Posted by bricktron View Post
good point on the W123 application. i'm not sure which version of the engine it is really.

U.S. market engines are always the bigger ones. the US was and is obsessed with displacement, automatic transmissions, and air conditioning. europe seemingly had other interests like cloth seats, more emergency equipment, and higher fuel taxes.
And don't forget the fact it you might drive for a couple of thousand miles at high-way speeds to reach your destination.
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Old 03-21-2017, 10:37 PM
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I think those engines may be OM621 200D engines from the mid to late 1960s, the predecesser to the OM615. The block number starts with 621. They were a whopping 55 HP, which was no match for my OM615 220d at 60 HP.
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Old 03-22-2017, 05:41 PM
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OM621, approx. 1967


OM615 (from Typ 115, not 123), approx. 1976


Last edited by Dr. Sternschnuppe; 03-22-2017 at 05:52 PM.
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Old 03-22-2017, 06:26 PM
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Transit buses used to have small MB engines providing AC / heat / electrical power when main bus engine was not running. I'm pretty sure it also preheated the main engine for cold starts.
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  #12  
Old 03-23-2017, 02:11 AM
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Remember the 200D used the OM615 up till '85....220D discontinued about 1980(?)

You yanks moan about 300Ds being slow, would hate to think what you'd make of a 200D
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  #13  
Old 03-23-2017, 05:22 PM
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Quote:
Originally Posted by Dr. Sternschnuppe View Post
OM621, approx. 1967


OM615 (from Typ 115, not 123), approx. 1976

Dr. Sternschnuppe-
Can you clarify how you can tell the difference? I love learning about these old engines and how to tell they are different. I see the butterfly control rod passes differently on those two engines. For the OM615, is there any way to tell if it is a 200D or 220D, or maybe even a OM616 240D? Thanks for any info you can provide.
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  #14  
Old 03-23-2017, 06:49 PM
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Per the ad for the motors are for a w123, there is no way a stock 621 fits a w123 chassis. The manifold is too high and will keep the hood from closing.
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Old 03-26-2017, 05:46 PM
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Quote:
Originally Posted by Shortsguy1 View Post
Dr. Sternschnuppe-
Can you clarify how you can tell the difference? I love learning about these old engines and how to tell they are different. I see the butterfly control rod passes differently on those two engines. For the OM615, is there any way to tell if it is a 200D or 220D, or maybe even a OM616 240D? Thanks for any info you can provide.
OM621 has bigger oil filler cap & on the block is part number started with 621....

The OM615 has valve cover fasten with bolts. An OM616 has one fasten with nuts. It has IP with vacuum governor, so it's up to 1979 engine. It has small oil filter, pre-1976 fuel filter style, "passenger's car" intake manifold, different from little trucks & buses, so it's from Type 115. No, there is no way to tell if it's 200 or 220. Motor-Nr. or IP-Nr. would clarify this.


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