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#1
05-03-2008, 02:51 PM
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350 SD conversion to a 1984 300SD powerplant
I have a complete 300SD donor car with a really ugly body. I am considering purchasing a 350SD with a (shocker) blown motor. I believe that it can be done with the donor car that I have. It is currently one of my drivers. The 350SD has an immaculate body. The 300SD has a solid drivetrain but a worn suspension and, as I mentioned before, an ugly body. I believe the vehicle has over 400,000 miles on it. (odo died at about 330,000 before I got it and I have owned it for two years) Given the fact that they are both 126 can I take the parts needed from the 300SD to the 350SD as I go? I appreciate all constructive replies. Thanks.
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#2
05-03-2008, 03:04 PM
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First, there is no 350 SD that I know of, only the 350 SDL. Is your donor a 300SDL with a 6 cyl 603, or a 300SD with a 5 cyl 617?
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#3
05-03-2008, 03:27 PM
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Wow, that was fast
Hhhm I was pretty sure that there was such a thing as a 350 SD.... I could be wrong. For discussions sake I will assume that we are talking about a 350SDL. (I could have sworn it said SD on the back tag) The donor car is a 5cyl. 1984 300SD.
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#4
05-03-2008, 03:29 PM
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this is the type of vehicle I am talking about. (of course not the actual one.)
http://austin.craigslist.org/car/663318564.html
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#5
05-03-2008, 03:40 PM
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Quote:
 
__________________
2003 Volkswagen Jetta Wolfsburg Edition, "Tiffany," - Black/Black Cloth - 75K miles, Jetta #6; my faithful, turbocharged, BBS-adorned sled SOLD 3/08 1981 Mercedes Benz 300D, "Elise" - Astral Silver/Black M.B. Tex - 217K miles - I miss her everyday; the best-built car I've owned
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#6
05-05-2008, 01:21 PM
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Quote:
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#8
05-06-2008, 11:31 AM
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#9
05-03-2008, 06:53 PM
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I think that was the one that was only sold as a 1990 MY? one of those later models either the 350SD or the 350SDL was only sold for one year. the other was sold in 90 & 91.
__________________
 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
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#10
05-03-2008, 08:26 PM
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As far as the conversion goes, its pretty straight forward I think, you will have to ditch alot of the electronics from the 350 motor, It will bolt in with the exception of one of the engine shock mounts, (it will be on the wrong side for your 84 300 sd. If you swap engine and trans together it will work ok.
Problem could arrive when emissions finds out you put an older engine into a newer car, however if that is not a concern, the actually time to do the sway should be about a weekend. you shouldnt run into many issue, since you have both cars.
__________________
1984 Euro 300SDC, (4spd standard) 1986 Toyota Landcruiser Diesel HJ60 5spd X2 Gone but not forgotten (some sold, some stripped) 1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
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#11
05-05-2008, 11:10 AM
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So the consensus would be that it would not be a catastrophic failure? Emissions are not a problem in my state as Diesels are emissions exempt. How about the ignition switch? Will the 350 harness hook up to it?
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#12
05-03-2008, 08:27 PM
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Quote:
Last edited by Brian Carlton; 05-04-2008 at 09:11 AM.
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#13
05-03-2008, 09:33 PM
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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.
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#14
05-04-2008, 09:11 AM
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#15
04-28-2010, 04:12 PM
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__________________
1991 350SD (updated rods) Biodiesel B100 when I can find it. Dino when really cold outside
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