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  #1  
Old 04-11-2007, 10:26 PM
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Location: Taylorville, Il.
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300D turbo to 240D Swap

Well the decision has been made to put a 5 cylinder in my girlfriends car I have a motor and trans with 68K on them out of an 82 300D, what all am I going to need to do this guys, the car I got the motor out of is still at the yard but is missing a few things no radiator, and the front part of the drive shaft the part that slips on the front of the drive shaft is missing but the rest of it is there and the yard cut the oil cooler lines when the pulled the motor. let me know what I can keep off the 240 motor and what I will have to find thank you much guys
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  #2  
Old 04-11-2007, 10:31 PM
ForcedInduction
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Auto -> Manual Transmission Conversion Has Begun.
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  #3  
Old 04-11-2007, 10:52 PM
unkl300d's Avatar
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won't you need to swap out the rear differential also?
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1979 300D 199 K miles
1995 C280 95 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD
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  #4  
Old 04-11-2007, 10:54 PM
ForcedInduction
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No. The 3.69 is fine, but not the optimal gear ratio choice.
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  #5  
Old 04-11-2007, 11:16 PM
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Quote:
Originally Posted by Dewhite2485 View Post
Well the decision has been made to put a 5 cylinder in my girlfriends car I have a motor and trans with 68K on them out of an 82 300D, what all am I going to need to do this guys, the car I got the motor out of is still at the yard but is missing a few things no radiator, and the front part of the drive shaft the part that slips on the front of the drive shaft is missing but the rest of it is there and the yard cut the oil cooler lines when the pulled the motor. let me know what I can keep off the 240 motor and what I will have to find thank you much guys
Is the 240 auto or stick? You should be able to use the 240 radiator...I am.
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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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  #6  
Old 04-11-2007, 11:25 PM
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its an auto sorry to not have put that, I dont remember if I still have the engine mount pedestal that bolt to the block or not are the ones on the 240 engine the same ?
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  #7  
Old 04-11-2007, 11:46 PM
t walgamuth's Avatar
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Join Date: Apr 2005
Location: Lafayette Indiana
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i strongly recommend swapping in the bigger radiator and the correct for the motor rear end as well.

with a 369 and a turbo motor you will have a noisy ride on the highway and use a lot of fuel.

first gear will be pretty worthless too.

but you will win many drag races!

tom w
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Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #8  
Old 04-12-2007, 01:09 AM
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I dunno, my first gear is still pretty sluggish...lol\
I put a non turbo in mine, I kept my stock radiator (not realizing they were different) and its been fine so far, kept my original rear end. Used my original aluminum mount arms. The valve cover holes are in the same relative location to the mounting points of the engine so the original throttle parts can be reused. I also reused the origional engine oil cooler and lines.

What I had to change to make the swap:
1. trans cooler steel hard lines are longer on the 5 cyl.
2. trans shifter linkage rod under the car is shorter for the 5 cyl.
3. trans crossmember is different, uses the next back set of body holes (and the drive tunnel is tapered so the 5 cyl member has a shorter span).
4. driveline front section is shorter, rear section is girthier for 5 cyl.
5. Had to add one wire and connector pin to my glow plug relay harness for the extra GP, to the pin labeled G5.
6. used the clutch fan that was with the 5 cyl (for better mileage/power), but the plastic origional non clutch fan would've worked.

Everything else is pretty straightforward. My mileage as of last week is right about 33 mpg.
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  #9  
Old 04-12-2007, 02:51 AM
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you might have to upgrade your springs in the front end to handle the extra weight.
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  #10  
Old 04-12-2007, 12:19 PM
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When you get the OM616 out, there is a frame crossmember under the motor. If there is a bolt in the middle of that, take it out. It will hit the oil pan on the OM617. You will need to swap the motor, tranny, driveshaft, rear diff., exhaust, GP relay, radiator, nuetral safety switch harness, oil cooler lines, speedometer, ....
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  #11  
Old 04-12-2007, 02:33 PM
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Location: Taylorville, Il.
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seems like a lot of work haveing second thoughts on doing the swap, what do you guys think the engine in the car now needs some work, I dont have the car here yet to know exactly what is wrong but its fixable Im sure, she's guna be driving on the highway and possibly interstate would I be better off to do this swap or will the current engine hold up to and preform decently on the highway or interstate, getting most of those parts is not a big deal the car I got this engine out of is still at the yard, would have to get a radiator but Im sure I could find one of those so Im not sure yet what i want to do
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