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Old 08-13-2007, 02:42 PM
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Location: London, Ontario, Canada
Posts: 543
380 SEL to 300 SDL converion details

Hi guys and gals, this weekend I converted a 1982 380 SEL to a 300 SD (5Cyl). I worked about 24 hours, and the owner of the car about 18 or so. both cars were sitting next to each other. A mechanic might have been able to shave a few hours off, but this was not my first conversion.

The important points to mention are: You should swap the ignition switch from the diesel to the gasser this allows for the diesel vacuum shut off.
I trigger the original glowplug circuit with a pushbutton switch, this saves time not messing with the wiring. You swap the tailshaft of the transmissions, so that the diesel works with the original driveshaft to minimize vibrations. with the gasser body unless you want to weld a little bracket you have to live with only 1 engine shock.

If anyone has specific questions ill try to answer them.

In terms off difficulty if you can pull an engine then you can do the swap, just takes time.

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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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Old 11-05-2007, 02:57 PM
biobenz617's Avatar
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Location: Denver, CO
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gear ratio?

Are you using the original rear end from the M116? I'm curious how the gearing will turn out. I've heard the M117 W126 cars had an LSD. That would be the ultimate The gearing might be a little high though (2.24)
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2002 Audi S6 Avant
1983 300D
1984 300D (sold)
1990 560SEL (sold)

Last edited by biobenz617; 02-20-2008 at 10:25 PM.
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Old 11-05-2007, 03:12 PM
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Good work Icefire/ AKA Dr. DeBakey I salute your transplant!

Now, how do you go about get around the exhaust emissions testing on the 380 SEL's VIN? Or does your Province have those annual inspections?

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