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  #1  
Old 03-14-2003, 05:15 AM
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Join Date: Sep 2002
Location: Denmark
Posts: 412
w124 gasoline > turbodiesel conversion?

I'm thinking of converting my 1986 300E to a 300TD.

Background: Gasprices in these parts of the world are going through the roof at the moment. -Dieselprice is dropping.. Go figure?
This is also the reason i can't sell my gas-guzzling 300E. (and buy a 300TD instead) -I don't even think i would be able to give it away for free! Well.. maybe.

So.. Is it possible -and economically reasonable to drop a 300 turbo-diesel engine in my 300E?

How much "stuff" beside the drivetrain is required? -ECU? -Fuel pumps?

Freestyler
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'86 300E optically converted to '95 E300 (Sold)
-Blauschwarz on silver
-Black leather
-17" AMG & 15" AMG for winter
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  #2  
Old 03-15-2003, 02:29 PM
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Join Date: Jan 2003
Location: Dedham, MA
Posts: 58
Much is different, and I strongly suspect the economics are not in your favor. If you really think you would stick with the diesel for a long time, I think you should shop for a good one and then sell your 300E for the best you can get. Maybe the prices for it would rise in the spring or after the war is over (assuming we have one).

Obviously the engine is different. Glancing at a parts catalog gives some indication of what else would probably have to be changed. Keep in mind that you might not be able to get the diesel-specific parts used, in good condition, and would have to buy new ones.
The transmission is controlled differently so things like the control pressure cables are not same (although I think the basic unit is the same). The rear end ratio is different so you'd need a different differential. Some other drive line parts might differ, such as drive shafts or flex discs. If so,, the mounting might change. Fuel lines and fuel tank filters and breathers are not the same. Exhaust system is different. Cooling system looks to be quite different, including radiator and shroud. Some of heater hoses differ. The engine compartment arrangement is somewhat different, so even some of the things that could stay would have to be rearranged, meaning probable body work to mount them. For example, the windshield washer fluid bottle is a different size and shape and location! There are electrical differences, too, such as the whole diesel glow plug circuit, which affects items in dash, under dash, under hood, etc.
You can buy a lot of gas for what these changes would cost...
And believe me, I am a diesel fan and would have one myself right now if I could.
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1992 300E with ASR
35 years of Diesels until now!
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  #3  
Old 03-16-2003, 10:44 AM
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Join Date: Sep 2002
Location: Denmark
Posts: 412
Thanks for your input DavidB29,

Considering all that, i think i'll stick with what i've got until i can sell it for a reasonable price.

Freestyler
__________________
Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes!


'86 300E optically converted to '95 E300 (Sold)
-Blauschwarz on silver
-Black leather
-17" AMG & 15" AMG for winter
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  #4  
Old 03-16-2003, 05:12 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
First you gotta find a 603 engine in good shape. This will be more difficult than you would believe, my favorite MB yard didn't have any at all last time I asked, just "cores" with something serious wrong with them (typically bad heads or bent rods).

It can be done, but it ain't gonna be cheap!

You will need engine, transmission, rear end, probably driveshaft, new fuel lines since the diesel ones are different, different tranny control system, and a different computer (yes, the 601/602/603 turbo has a computer...).

Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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