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1968 Datsun 520 SD22 diesel build


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#1 Cahoon520

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Posted 25 May 2010 - 04:15 PM

Posted ImageHeres how it all began........
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The old smokey j13
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All shined up.
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After looking for about year for a motor and drivetrain for this truck I finally found the perfect engine a sd22 diesel in a 1981 Datsun 720.
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The cab off for the fitting sd22...
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The motor mounts we had to make.
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The fitting of the engine and transmission
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The sd22 in the truck with the cab installed.
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Wow was that a tight fit.



#2 KB100

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Posted 25 May 2010 - 05:46 PM

Nice truck!

#3 datzenmike

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Posted 25 May 2010 - 05:48 PM

Did you know that the 720 diesel never was offered with an automatic? Only a 5 spd and was never in the 4X4?

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#4 DRIVEN

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Posted 25 May 2010 - 06:45 PM

I'll be watching.
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#5 RadioRedline

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Posted 26 May 2010 - 07:32 AM

Canada West Side Holla!

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#6 Farmer

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Posted 26 May 2010 - 09:27 PM

This is a cool project your working on. I'll be tracking this one for sure

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#7 Charlie69

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Posted 27 May 2010 - 12:37 PM

Looks great. Where is the radiator going?

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#8 Cahoon520

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Posted 27 May 2010 - 06:47 PM

Looks great. Where is the radiator going?


I notched out the the front core support about an inch now I have the radiator in with the fan from the j13 I will take a picture in the tomorrow.

#9 Charlie69

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Posted 28 May 2010 - 05:45 AM

That is one of the problems I have with the L20B is the radiator. I have a radiator out of a prelude that I am modding in.

I will post some pictures next week in my build thread.

That diesel should really pull that little truck well. Nice work, please keep us posted.

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#10 Billy_Bottle_Caps

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Posted 31 May 2010 - 06:07 PM

Nice project

#11 datzenmike

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Posted 31 May 2010 - 06:12 PM

Did you know that the 720 diesel never was offered with an automatic? Only a 5 spd and was never in the 4X4?


Did you know that the diesel bell housing will fit the Roadster motor? allowing the FS5W71B 5 speed to be swapped on?? Some mixing and matching of clutch arms and bearing collars are needed but it's do able. Bet you didn't! :o

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#12 Cahoon520

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Posted 01 June 2010 - 09:15 AM

Did you know that the diesel bell housing will fit the Roadster motor? allowing the FS5W71B 5 speed to be swapped on?? Some mixing and matching of clutch arms and bearing collars are needed but it's do able. Bet you didn't! :o

Wow you should write a book! How do you know all this stuff?

#13 ppeters914

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Posted 02 June 2010 - 04:17 PM

Did you know that the diesel bell housing will fit the Roadster motor? allowing the FS5W71B 5 speed to be swapped on?? Some mixing and matching of clutch arms and bearing collars are needed but it's do able. Bet you didn't! :o

Wow you should write a book! How do you know all this stuff?

In this case, he learned it from me. A roadster guy in Vancouver, BC figured it out.

The other question roadster folks are wondering is if the SD22 3-main/SD25 5-main cranks will fit the R16 3-main/5-main blocks for a stroker.
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#14 Cahoon520

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Posted 09 July 2010 - 04:03 PM

I sick of working on mechanical stuff so I turned my attention to the interior.<div>Heres a few pics</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>Posted Image</div><div>The seats are from a dodge of some kind I still have to figure out &nbsp;the the wiring for the power seats. the carpet is out of a 720.&nbsp;</div>

#15 lilblackwagon

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Posted 09 July 2010 - 04:17 PM

Cool build! I'll be watching this one...Posted Image

#16 WAGON JON

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Posted 09 July 2010 - 07:33 PM

I like this build! diesels are an awesome engine because they run on oil for energy. Now, on a side note, diesels aren't as efficient in a normally aspirated configuration. Therefore an exhaust driven blower, as time and money permits, will be a welcomed boost in performance. Remember, if you don't like the guy behind you just smoke them out!!! :lol: By the way, do I spy a speaker-boom set behind those seats?
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#17 elmerfudpucker

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Posted 09 July 2010 - 08:10 PM

So, are you going to hybrid it to run on veggie oil to?

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#18 Cahoon520

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Posted 09 July 2010 - 08:47 PM

I like this build! diesels are an awesome engine because they run on oil for energy. Now, on a side note, diesels aren't as efficient in a normally aspirated configuration. Therefore an exhaust driven blower, as time and money permits, will be a welcomed boost in performance. Remember, if you don't like the guy behind you just smoke them out!!! :lol: By the way, do I spy a speaker-boom set behind those seats?


Ya, them are my amps and x overs behind the seats I am going to build a sub box that fit where the package tray is and I am going to be putting a set of components in the door.

#19 datzenmike

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Posted 09 July 2010 - 09:09 PM

In this case, he learned it from me. A roadster guy in Vancouver, BC figured it out.

The other question roadster folks are wondering is if the SD22 3-main/SD25 5-main cranks will fit the R16 3-main/5-main blocks for a stroker.


Good question. The LD28 crank fits the L28 motor that can't be coincidence.


Now, on a side note, diesels aren't as efficient in a normally aspirated configuration. Therefore an exhaust driven blower, as time and money permits, will be a welcomed boost in performance.


Not sure what you mean. A n/a diesel is way more efficient than a n/a gas engine. A turbo diesel will definitely make way more power than a n/a diesel.

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#20 wayno

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Posted 09 July 2010 - 11:21 PM

I like these kind of projects also, I found a convertable 520 in redmond oregon(I have a pic. somewhere), it was/is a good after market job with a visor, I got the tape measure out, and I could see no way to get the SD22 engine in it, the engine is 26" long from bellhousing to the fan, as I recall there was only 25" to 26" in the engine compartment from firewall to radiator mount surface. Did you locate the transmission shifter hole farther back, or did you mate a nissan 720 short shaft 5 speed to the diesel casing and use the stock 520 shifter hole? Datsun/nissan parts are so interchangable, you can also get the L20B case off a 1980 720, a short shaft 5 speed out of a 1985 nissan two wheel drive regular cab 720( you need the speedo drive), mate the l20B casing to the napz 5 speed transmission, and bolt it in to any L block datsun 521. What did you do about the heater core? Was there be any room in the back of the engine for the hoses, or were they routed somewhere else?

I know the voices are not real, but they have some really good ideas.

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1962 Datsun U320

1963 datsun L320
1964 datsun NL320
1966 datsun 520KC UTE
1967 datsun roadster
1969 datsun 521KC diesel
1971 datsun 521 dually(work truck)
1980 datsun 720KC dually diesel

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