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  #1  
Old 05-01-2008, 10:12 PM
Oldbeaver's Avatar
MBZ 1993 turbo diesel
 
Join Date: Jul 2007
Location: Chile
Posts: 52
I got 40 mpg in my 1989 300E using diesel engine

My beauty is a 1989 MB, chassis W124, originaly a linear 6 cyl 3000cc gasoline engine.

The engine needed a costly repair, as it begun to consume too much oil and other problems.

The option was to swap the engine. I looked for a MB diesel engine, however it would cost more than the car itself if new and wasn´t available as used.

The only suitable engine I found was a Nissan RD28 6 cyl in line, aspirated diesel engine, 2800 cc.

Size is a little bigger than the original engine as is weight also.

I did the following:

1. Hire a mechanic to install the new engine, including the japanese automatic transmission that comes with the engine.
2. Changed the old radiator for a new local one, made of copper.
3. Kept the steel protection below the engine (some adapting work was necessary).
4. Changed the old front shock absorbers for new original Mercedes ones.
5. Adapted an oil cooler for cooling the transmission fluid, after the cooling unit that is inside the water radiator.
6. Adapted a air filter body and air filter.
7. Install a diesel filter.
8. Install a hidraulic fluid recipient.
9. Took out air conditioning system (not necessary here).
10. Hire an electrician to make all the electric work, including all instruments BUT the tachometer.
11. Adapted an ignition module to transform the tach signal from the RD28 engine to drive the MB tachometer.

I think that was it.

The car is running well. It yields 40mpg at a speed of 70 miles/h in the road. It was measured in a 90 miles trip from Santiago to Viña del Mar.

What is still missing to improve yield and performance:

The 4 speed + overdrive transmission is working well, however, is it too "long". Overdrive engages only over 60 miles/h , and the car is slow in up slopes.

Hope this thread is of interest of some members. Will try to attach pictures.

Best to all.
Attached Thumbnails
I got 40 mpg in my 1989 300E using diesel engine-command.jpg   I got 40 mpg in my 1989 300E using diesel engine-my-car.jpg   I got 40 mpg in my 1989 300E using diesel engine-rd28-engine-2.jpg   I got 40 mpg in my 1989 300E using diesel engine-rd28-engine-3.jpg   I got 40 mpg in my 1989 300E using diesel engine-my-car-2.jpg  


Last edited by Oldbeaver; 05-02-2008 at 03:38 PM. Reason: Attach more pictures
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  #2  
Old 05-02-2008, 01:41 AM
iwrock's Avatar
roflmonster
 
Join Date: Nov 2003
Location: Hella NorCal
Posts: 3,312
Thats freggin awesome!



Did you keep the MB steering box?
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01 Honda S2000 - dogs dd
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it's automatic.
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  #3  
Old 05-02-2008, 07:21 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,521
As my favorite machinist would say...."looks like it grew there".

Nice.

Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #4  
Old 05-02-2008, 03:25 PM
Oldbeaver's Avatar
MBZ 1993 turbo diesel
 
Join Date: Jul 2007
Location: Chile
Posts: 52
MB steering box

Yes, of course I kept it and is working well as ever.


Quote:
Originally Posted by iwrock View Post
Thats freggin awesome!



Did you keep the MB steering box?
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  #5  
Old 05-02-2008, 03:26 PM
Oldbeaver's Avatar
MBZ 1993 turbo diesel
 
Join Date: Jul 2007
Location: Chile
Posts: 52
"As it grew in place"

Thank you.
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  #6  
Old 05-02-2008, 09:28 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,991
It looks like a very sound install good luck with it.
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  #7  
Old 05-02-2008, 11:53 PM
Oldbeaver's Avatar
MBZ 1993 turbo diesel
 
Join Date: Jul 2007
Location: Chile
Posts: 52
40 mpg

Tks !
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  #8  
Old 06-06-2008, 09:43 PM
SPDMETL's Avatar
NO BENZ...YET
 
Join Date: May 2008
Location: Grand Rapids MI
Posts: 44
Is the Nissan engine new ? If not, what vehicle is that from ? Nice swap !
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  #9  
Old 06-26-2008, 11:14 PM
SPDMETL's Avatar
NO BENZ...YET
 
Join Date: May 2008
Location: Grand Rapids MI
Posts: 44
bump...
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  #10  
Old 08-22-2008, 04:30 PM
Registered User
 
Join Date: May 2006
Location: Reisterstown, MD 21136
Posts: 1
What did you have to do to adapt the Nissan transmission to the Mercedes Benz driveshaft?
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  #11  
Old 08-22-2008, 10:40 PM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
True Re-Engineering

Rudolph would be proud.
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  #12  
Old 09-20-2008, 06:24 PM
Ara T.'s Avatar
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Join Date: Sep 2004
Location: Santa Rosa, CA
Posts: 2,075
Cool. What is the 0-60 approximately?

What color is your interior? Looks gorgeous.
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1985 CA 300D Turbo , 213K mi
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  #13  
Old 09-20-2008, 06:34 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,336
Just glancing through Google it looks like that engine is only available from places other than US.

RD28

After looking a little further this guy may be on to something. Selling Japanese diesel engines for little trucks that are already in the US but may not have been available with them.

Perez
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Last edited by engatwork; 09-20-2008 at 06:42 PM.
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  #14  
Old 10-02-2008, 09:56 PM
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Join Date: Apr 1999
Posts: 2,633
Nice & unique!

:-) neil
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