Help nissan 720 sd22 diesel

SD diesels were widely available in the US in the 1981-86 Datsun/Nissan 720 pickups, and in Canada through '87 in the D21 pickup.

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plenzen
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Re: Help nissan 720 sd22 diesel

#16

Post by plenzen »

Interesting, and I stand corrected.

Perhaps the 720's had inline pumps then.

My D21 had the VE.
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
waynosworld
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Re: Help nissan 720 sd22 diesel

#17

Post by waynosworld »

I have never seen/heard of a diesel 720 with a VE type injection pump in the USA, after the 720 I have heard of the VE type pumps being used, likely because of emissions standards(has computer???), I have never actually seen one myself.

I did import a SD22 with a VE type injection pump from Australia several years ago, I did this to use the VE pump system complete to turbocharge my SD22 engine, but I figured out how to turbocharge my SD25 engines using the inline injection pumps, I described how I did it in my thread, both my SD25 engines are turbocharged now, I will never daily drive one without a turbocharged engine again, they are all gutless without one, but the turbo choice is very important, I turned 71hp into likely into 120hp, maybe more.

The biggest reason I like the inline injection pump is they last for 300,000+ miles, I have heard the VE type injection pumps are good for 60,000 miles before needing rebuilt.
I know the voices are not real,
but they have some really good ideas.
plenzen
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Re: Help nissan 720 sd22 diesel

#18

Post by plenzen »

Sold mine with 343000 Km ( 215000 miles) and only had the transfer pump changed in it, because it started to surge at low throttle low RPM.
Was still going strong and think it still may be however lost touch with the buyer 2 years ago. He drove it the 1400Km from here to his place without an issue.

No computers in the 87 D21. Closest thing to one of them was the glow plug timer under the driver seat.

Had a cold start device on the side of it that was a wax pellet variety that internally advanced the timing a couple degrees in an effort to help it start in cold weather. There are pictures of it on here somewhere
Cold weather to Nissan was -9C . -10C it would not start. Hence the air heater I put on it. A game changer.

Had quicker and hotter glow plugs on it as well as an after glow feature that would reduce the voltage to the plugs after start up and keep them on until it either timed out or the temp sensor in the intake manifold told them to shut off.

No problems with the fuel pump whatsoever. Easy to prime and to time putting back on the engine.


You are absolutely correct about the NA engine.
It was pretty slow and especially living here at 4000 ft it was pretty anemic.
However, putting a turbo on it at such high mileage without doing a head gasket was asking for issues.

I used to love driving it out to the BC coast. At sea level it felt turbocharged to me. Going over the Rockies was however no bueno.
Poor thing was on its knees. 4 way flashers on and on the shoulder to let traffic by. Ignore the single fingers. It's fine.

P
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
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