SAD DAY FOR MY 1974 240D - Mercedes-Benz Forum

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post #1 of 16 (permalink) Old 07-02-2013, 02:13 PM Thread Starter
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SAD DAY FOR MY 1974 240D

Well I have spent quite a lot of time on this car just to find out that she just does not have the compression anymore. I only have 1 cylinder that reads above 200. In fact 1 of the cylinders in under 100psi. I even poured a little oil in the cylinder to see if that would help after doing a valve adjustment. So now I turn to the Mercedes vintage world for help. Anyone out there with a engine for this car? I would not even mind a 1976 300d engine, since I believe it will fit my car with out modification. As long as they run. Or another option is to rebuild. Does anyone know of a good rebuild shop near Austin Tx? I would appreciate any help with this issue. I really want to save this car from the scrap yard, its in good shape in and out other than the engine.
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post #2 of 16 (permalink) Old 07-02-2013, 06:40 PM
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Don't go with the 300D. It'll work but if you go with a 240D instead almost everything you have on your car now will swap over.

I wouldn't rebuild the 220D. Even brought up to original specs it's too under powered for the existing highway speeds.

*Late edit* I don't know why I thought this was a 220D when I first read the post. Following too many threads I guess.

Last edited by Mike D; 07-06-2013 at 12:14 PM.
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post #3 of 16 (permalink) Old 07-02-2013, 07:44 PM
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I wouldn't rebuild the 220D. Even brought up to original specs it's too under powered for the existing highway speeds.
As is a 240D. As is a 300D.

Felicita e un bicchiere di vino con un panino.
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post #4 of 16 (permalink) Old 07-02-2013, 11:00 PM
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Now, now, now, be kind to the man.
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post #5 of 16 (permalink) Old 07-03-2013, 05:58 AM
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As is a 240D. As is a 300D.
Oh yeah. Timed 0 to 60 with a calendar
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post #6 of 16 (permalink) Old 07-03-2013, 07:50 AM
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Maybe the best bet would be to get an OM617.951 or 2 turbodiesel and swap it in.
If the 5 cylinder OM 617 from a '76 300D would fit, I am assuming that the W115 body could also fit the turbo version... There a couple on fleabay right now ranging from $500 to $1500...

Keep the 240 D badges though...

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post #7 of 16 (permalink) Old 07-03-2013, 07:55 AM
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I agree with the Turbo Diesel.

Isn't is great how music makes a bad day better.
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post #8 of 16 (permalink) Old 07-03-2013, 08:37 AM
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You would have to really love it to spend $$ on a rebuild. My 78 300D was great but after 14 years the engine still ran great but most everything else had fallen off. Everything dies. Luck to you.
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post #9 of 16 (permalink) Old 07-03-2013, 01:49 PM
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You would have to really love it to spend $$ on a rebuild. My 78 300D was great but after 14 years the engine still ran great but most everything else had fallen off. Everything dies. Luck to you.
Very true, mine has died about 5 times.....the only thing that would keep it in the grave is the engine exploding or it rotting out from under me...

Me and my friend tried to save a w115 240d, it had a bad engine so we pulled one and put it in....but then the head gasket went south and oil got in the coolant....we sold it for parts....never looked back...
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post #10 of 16 (permalink) Old 07-04-2013, 09:26 PM
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If the car is in really nice shape then I think rebuilding the 240D motor is worth it.

I went through the absurd expense of having a 240D with a bad motor converted to a 300D turbo and a 4 speed, 300D flywheel and all and I wouldn't reccomend it. A OM617.910 will fit in the bay but a OM167.95x will not, you will need to have an oil adapter plate made and have the oil filter relocated elsewhere. The turbo will not fit and a custom manifold will need to be made because the W115 engine bay is a bit narrower than the W123 engine bay. It also needs a bigger radiator to handle the heat and the larger exhaust system to handle the flow. The driveshaft will need to be cut and balanced and the transmission crossmember will need to be modified. It also adds more weight and so the front suspension will have to deal with that.

1977 - W116 - 6.9
1974 - W115 - 240D /8 - 4(M) OM617.910 + Turbo + 300D FW - Completed 7/8/10
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