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#1
02-11-2007, 04:56 PM
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Engine swap 123 to 126
Hello Everyone! New to this forum.
I have some questions about installing a 5 cylinder Turbo Diesel from a W123 chassis into a 126 chassis. Can the engines be swapped straight across or are there modifications required, and if so how difficult. Thanks Sedecrem 
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#2
02-11-2007, 11:02 PM
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If the 126 had a 617, then I think the biggest difference is the motor mount brackets/arms.
What was/is the 126 now, and what year? What year is the 123?
__________________
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein 09 Jetta TDI 1985 300D
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#4
02-12-2007, 01:35 AM
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Why though, would you want such a weakling in a 126 car though? Just curious. What is the curb weight difference between the two cars. I know the 123 is a whole lot less car than the 126 as far as weight goes. As it is the 123 can't get out of it's own way, and I can't imagine a 126 with a 617 anything in it. It's equal to putting a four cylinder, from a Cavalier, into a full size Chevy Caprice wagon. It can be done, but why, and is the end result really worth it? Don't want to harp on you for it, but these are my thoughts on the whole idea.
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#5
02-12-2007, 02:58 AM
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Truck
You are thinking of the 300D normally aspirated motor @ 88 hp. The engine I am considering is a turbo, same as the engine that is in the car now. You are correct of course about using a 300D non turbo in a W126. These are slow in the W123 chassis which is some 400-500 lbs. lighter than the W126. Thanks for the post Sedecrem
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#6
02-12-2007, 12:52 PM
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youll need to swap arms and oil pressure sending unit with the oil line.
__________________
 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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