Hello. I just recently dropped the engine from an 84 300D into my 84 300SD and then noticed that the engine mounts don't line up. No problem, thought I, as I got the mounts and arms from the old SD engine. Lo and behold, the bolt patterns on the two engines are different! Is there someplace I can find out exactly what engines will bolt into my 84 300SD? Or is there some sort of adapter or arm and mount that will make this engine bolt up?

Thanks!

rr






... and YES, I have done a search, but with no luck...

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r2

'85 300SD 193k miles (parts)
'81 300SD 400k miles-sold
'84 300SD 205k miles-sold
'84 300TDT 270k miles-sold
'80 300CD 200k miles-sold

There was only one block for the entire 617 turbo diesel series so the engine arms should work if they are from a 126 class 300SD (81-85)

81-85 300SD engine arms
pass. side..617 223 37 04
driver's......617 223 36 04

How old of a 300SD is it? If it's from the 116 300SD (78-80) the arms won't work in the 126 300SD

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83 300D 328k mi (623) Light Ivory - daily driver
82 300D 166k mi (881) Thisle Green - fixer upper
82 300D 282k mi (473) Champagne - parts

That's what I thought! Just talked to the local dealer and apparently mid 84 there was a change. Just my luck! I'm looking at the two engine "arms" and they do indeed have different bolt spacing. As previously stated the donor engine is an 84 300D, NOT an SD so I can understand the arm being longer on the SD (larger body) but the bolt pattern is the big fly in the soup.

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r2

'85 300SD 193k miles (parts)
'81 300SD 400k miles-sold
'84 300SD 205k miles-sold
'84 300TDT 270k miles-sold
'80 300CD 200k miles-sold

That's strange because the EPC states that there never was a change to the engine arms on the 81-85 300SD. The EPC is raarely, if ever incorrect so you may need to ask the dealer for more info.

What's the part numbers for your eng arms?

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83 300D 328k mi (623) Light Ivory - daily driver
82 300D 166k mi (881) Thisle Green - fixer upper
82 300D 282k mi (473) Champagne - parts

Betcha he's talkin about the w124 300D providing donor 603 engine that wont swap with 617's.

Yer 1984 w126 300SD has practically nothin in common with 1984 w124 300D. But any (617) w123 300D or w116 300SD longblock from 1977- 1984 will bolt straight across.

The right side part number for the SD is- 617 223 40 04.
The right side part number for the D is- 617 223 36 04.

What is EPC and where can I access this?


So this D engine could be a 603 from a 124? It would've been nice to know that!


rr

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r2

'85 300SD 193k miles (parts)
'81 300SD 400k miles-sold
'84 300SD 205k miles-sold
'84 300TDT 270k miles-sold
'80 300CD 200k miles-sold

1984 W124 300D? show me such a beast.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

617 223 40 04 is for the 300D chassis not the 300SD
617 223 36 04 is for the 300SD

617 223 36 04 should work on your 84 300SD chassis.
Are you saying it won't bolt to the 300D 617.952 motor?

http://epc.startekinfo.com/epc/welcome.jsp

It's a bit of a learning curve. You can register for free if you're from the US, although you need to provide a CC number

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83 300D 328k mi (623) Light Ivory - daily driver
82 300D 166k mi (881) Thisle Green - fixer upper
82 300D 282k mi (473) Champagne - parts

I agree. There is nothing in common with a 1984 W124.........mainly because the very first year of the W124 was 1986.

Yep, the 601, 602, 603 series diesels began in '84 with w124 cars - first year of the w124 chassis series - that were never equiped with 617's. Thats the most important discrepancy i can find based on what yer sayin.

The engine is not from a W124.........if it is from model year 1984 and it originated in the US.

Any other info provided on this thread concerning the W124 is factually incorrect..........as usual.

Brian, we're talkin about 1984 that was cusp year for MB change comparable to 1976/77 and '67/68. And arguing what MB did or didnt produce at these points is ridiculous.

Vegburner, nobody knowin MB can believe they changed motor mount arm bolt/dowel patterns on the 617 block. Ye pullin our leg??

Brian, you're correct about this, there was no 124 until 1986 and it has nothing to do with this thread.

Posts which contain 124 should be ignored.

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83 300D 328k mi (623) Light Ivory - daily driver
82 300D 166k mi (881) Thisle Green - fixer upper
82 300D 282k mi (473) Champagne - parts

You all sure the 124 did not begin production in Europe earlier? It wouldn't be surprising.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

It may have nothing to do with the thread, but it's misinformation. Euro W124s were available as 1985 year models in late 1984. Euro markets have typically gotten MBs about a year or two before North American markets did.

Back to the originally scheduled program.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.