Nissan D21 SD25
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Nissan D21 SD25
I'm looking to buy a D21 SD25 in Canada but I'm having a hard time finding one. I'm curious to this model. I do and have owned diesel cars including VW TDI's and Mercedes diesels. Is the SD25 a turbocharged engine? How reliable are they? Do they have any know problems? Are parts hard to find and to service?
- philip
- Deceased
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- Location: Southern California, USA
Re: Nissan D21 SD25
The SD23 and SD25 are not turbo. If you want that version, find the TD-25 and TD-27.
The SD23/25 have 5 crankshaft journals ... that are the same diameter of the SD22 but are narrower. The SD22 has three mains that are quite a bit wider ... same as the SD33 six cyl.
There are a number differences in the SD23/25. Both are very robust. "Problems" are due to neglect. Keep the oil changed, keep the cooling system good, keep nitwitts away from electrics.
In ANY SD engine, you need to have the Nissan Motor Manual because nobody else handy is going to know anything useful.
And as I have said before ... a D21 with an SD25 does not really exist.
The SD23/25 have 5 crankshaft journals ... that are the same diameter of the SD22 but are narrower. The SD22 has three mains that are quite a bit wider ... same as the SD33 six cyl.
There are a number differences in the SD23/25. Both are very robust. "Problems" are due to neglect. Keep the oil changed, keep the cooling system good, keep nitwitts away from electrics.
In ANY SD engine, you need to have the Nissan Motor Manual because nobody else handy is going to know anything useful.
And as I have said before ... a D21 with an SD25 does not really exist.

Last edited by philip 17 years ago, edited 1 time in total.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
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- Joined: 18 years ago
- Location: Alberta, Canada
listen to big p..............he knows,.....i'm one of the three on this forum that owns one. unless you are lookin for a challange i suggest not finding one. parts non-existance, maintanance- full time, you have to give the s/n # when you go to nissan, because it does not come up automaticly in their system...........i know they are out their, one is making a nissan mech. out of another on this fourm! parts are VERY hard to find, after all is said and done at the end of the day.........some mecanixs, are up for the challange and will never be rid of their truck, i'm one, on a MISSION, 1mil on the od. good luck!
87 D21,SD25.
may she NEVER stop smokin!
may she NEVER stop smokin!
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- Joined: 18 years ago
- Location: southwest Manitoba, Canada
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- Joined: 14 years ago
- Location: Richmond,B.C.
Im another guy that has 87 d-21 with a factory sd25 love my truck but i have to take it off road to fix a bunch of small problem windshield,oil leaks,brakes.
fix frame and crossmember . Love to get it all road worthy again
I have a service manual for nissan trucks.
Have a 720 sd 25/transmission, has 30,000 km and wiring harness .
If i can not reserect may sell it all
fix frame and crossmember . Love to get it all road worthy again
I have a service manual for nissan trucks.
Have a 720 sd 25/transmission, has 30,000 km and wiring harness .
If i can not reserect may sell it all
40 year old import loving adolesent.
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- Posts: 893
- Joined: 17 years ago
- Location: Cochrane Alberta Canada
How did the cross member get busted ?
Sounds like it had a hard life.
Still if you can keep it going they are nice little trucks.
Mine lived it's original life out there and loves to return to the nice sea level think air. Here at 4000+ feet it's a little on the anemic side but will still drive it till there is nothing left.
Paul
http://nissandiesel.dyndns.org/viewtopic.php?t=1427
Sounds like it had a hard life.
Still if you can keep it going they are nice little trucks.
Mine lived it's original life out there and loves to return to the nice sea level think air. Here at 4000+ feet it's a little on the anemic side but will still drive it till there is nothing left.
Paul
http://nissandiesel.dyndns.org/viewtopic.php?t=1427
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
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- Posts: 8
- Joined: 13 years ago
- Location: Victoria BC
D21/sd25 for sale
Hi guys, my 87 d21 sd25 is for sale.
Good motor
New glow plugs (slow acting)
250 k on motor
100 k on rebuilt 5speed
Body is a bit rough but save able extra cab
Good tires
Located in Victoria BC
Asking 2000$ obo
Call me at (250)896-5444
Andy
PS Comes with manual
Good motor
New glow plugs (slow acting)
250 k on motor
100 k on rebuilt 5speed
Body is a bit rough but save able extra cab
Good tires
Located in Victoria BC
Asking 2000$ obo
Call me at (250)896-5444
Andy
PS Comes with manual
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- Posts: 249
- Joined: 15 years ago
- Location: Anderson, SC
Re: D21/sd25 for sale
Pricey, but to far from me anyway.Modsqwad wrote:...sd25 is for sale...Located in Victoria BC...Asking 2000$ obo...
Andy
82 King Cab 2wd (nice)
82 Reg Cab (body damage)
Anderson , SC
Since Fall 2009
82 Reg Cab (body damage)
Anderson , SC
Since Fall 2009
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- Joined: 11 years ago
- Location: Ucluelet, B.C. Canada
D21 SD25 still going
I also have an 87 D21 with an SD25...but I am about to change it for another SD25. The "new" one has an inline IP so am assuing it is pre 87 out of 720.seasemesnap wrote:Im another guy that has 87 d-21 with a factory sd25 love my truck but i have to take it off road to fix a bunch of small problem windshield,oil leaks,brakes.
fix frame and crossmember . Love to get it all road worthy again
I have a service manual for nissan trucks.
Have a 720 sd 25/transmission, has 30,000 km and wiring harness .
If i can not reserect may sell it all
The current engine has 500,000 km on it and is getting a little tired, though still runs well.
If this all works out, I may sell the older engine if someone wants a project.
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