SD22 question (720 4WD factory SD22?)

[pidder]

I am looking at a 1984 nissan pickup 4x4 with a sd22 engine that I want to swap into a suzuki samurai. The owner says it blows blue smoke for 3 minutes on a cold startup and clears up once it is warm. Says it always has and is supposed to be that way. Has owned the truck since 85 and always done it. Has 250,000 km on it. Does this sound normal in your experience. Or is it something that just needs adjusting and he has lived with for 25 years. How would this set up work for a samurai in your opinion. I want to run 31 inch tires with 3.73 gears and use the nissan transmission. I could change to 4.62 gears if needed. Any advice , opinions or info would be greatly appreciated. found lots of great info on here already. Keep up the great work. Thanks.

[asavage]

I am looking at a 1984 nissan pickup 4x4 with a sd22 engine . . .

Rare rig . . . never imported into the US, and I didn't think they were imported to Canada either. Plenty of folks spend a great deal of effort modifying the SD22's oil pan to put into a gasser 4x4 truck.

The owner says it blows blue smoke for 3 minutes on a cold startup and clears up once it is warm. Says it always has and is supposed to be that way. Has owned the truck since 85 and always done it. Has 250,000 km on it. Does this sound normal in your experience.

Yes, it sounds normal, if the amount of smoke isn't ridiculous -- whitish smoke when cold is more common though.

[pidder]

Funny you shoud say it is a rare truck. I have actually found 2 within an hours drive of my house in the last 2 weeks. Will be having a look at one this weekend. One of them I can get the whole truck for $400 which is good because I just want the motor and tranny anyway. Any peculiar things to look out for that are common to these engines? Looking forward to running a diesel samurai. Everyone else seems to do the vw swap because there is a kit, but I like to be different.

[asavage]

I'd have to recommend just reading up in this forum to learn the trouble spots with the SD engines. I've never seen a factory SD 720 4WD; I imagine that the oil pan is special, and when you buy one and pull the engine, I would surely love some good pics of that pan. See the oil pan modification the man had to do on his 4WD PU to make his SD engine fit (oil pan pics near the bottom).

[pidder]

I'm assuming he changed the oil pan to clear his front pumpkin. With my samurai, I am doing a spring over lift with jeep yj springs which will give me about 6-7 inches of lift. Also on the samurai the front pumpkin is on the passenger side unlike the nissan which is on the drivers side. So maybe with all my lift and pumkin on the opposite side I won't have to modify the oil pan. Only time will tell. Thanks for all the info so far.

[asavage]

I'm assuming he changed the oil pan to clear his front pumpkin.

Oh, so it's not a factory 4WD diesel? OK, that makes more sense.

[pidder]

I was talking about the link with the pictures with regards to the oil pan mod. As far as I know the trucks I am going to look at are factory 4x4's. Will update you after the weekend when I actually see one of them.

[pidder]

So I had a look at the pick up this morning. Did smoke white for about 3 minutes then cleared right up and ran fine. Oringinal diesel truck even had tag under the hood. Was a 1981 model with 255km on it. But is was a 2 wheel drive not 4x4 like I thought. Still have another one to look at though. I think I could make the motor and tranny fit into my Suzuki Samurai. Will see.

[asavage]

So I had a look at the pick up this morning. Did smoke white for about 3 minutes then cleared right up and ran fine.

That can be a bad glow plug(s). Or a GP system that isn't running them long enough. The white smoke is accompanied by cold misfire.

Original diesel truck even had tag under the hood. Was a 1981 model with 255km on it. But is was a 2 wheel drive not 4x4 like I thought.

Darn. Good drivetrain donor for your project though.

[pidder]

Yes would be a good donor, but I understand the motor and tranny combo from a 4x4 is about 6 inches shorter. That would help me by not having to move my transfer case back. Must check out the other truck on my list and see for sure.

[asavage]

I understand the motor and tranny combo from a 4x4 is about 6 inches shorter. That would help me by not having to move my transfer case back. Must check out the other truck on my list and see for sure.

Yes, the tailshaft on some years of FS5W71x transmission is notably shorter. This is not excusively a 2WD-vs.-4WD thing. From the few data points I have, you want the gears & rear half of a later trans, mated to an SD "bellhousing" (really, the front case half), or the ultra-rare 1986/87 factory SD25 diesel transmission. The former path is much easier & cheaper. See the long rambling thread, FS5W71x transmissions, which documents me doing such a graft several years ago -- though it's not my finest writing. It shows the SD "bellhousing" in detail. You can put it on a later gasser (or diesel) trans, but you'll have to either machine the countershaft (or was it mainshaft) bearing pocket in the "bellhousing" for the larger, later bearing (recommended) or find a smaller OD bearing with the correct countershaft (or was it mainshaft) inner diameter -- which may not actually be different in the later trans.

Those two front brgs are weak areas in that series of trans, as are the reverse gears, and to a lesser extent the OD gear (mainly, the mainshaft nut comes loose).

[pidder]

Thanks for the info. The other truck I am going to look at is an 85 model year that originally had an sd25 in it. So hopefully it still has the tranny from that motor. Won't be able to see the other one for a week or two. Still buried under the snow on some guys farm.

[mani]

I'd have to recommend just reading up in this forum to learn the trouble spots with the SD engines. I've never seen a factory SD 720 4WD; I imagine that the oil pan is special, and when you buy one and pull the engine, I would surely love some good pics of that pan. See the oil pan modification the man had to do on his 4WD PU to make his SD engine fit (oil pan pics near the bottom).

Hello,
I have both the early and late 720 4WD sd sumps and also have the d21 4wd sd25 - which is interesting as there is no room in sump for the oil pump so they moved it to the back of the timing case and plumbed it with more cast pipe like the oil cooler, when converting say a 2wd engine over don't miss the sleeve that goes in to block off the oil galleries in the normal pump position, d21 also runs (ryco z186)dual element oil filter
sd22 z134, sd23 z115
not sure if our ryco numbers mean anything to others

I have some sump photo's - is there someone I can mail them to who would like to host them

mani

[asavage]

. . . d21 also runs Ryco dual element oil filter

SD22 Z134 = Baldwin B295 = Wix 51512 (same as US SD22s) Full Flow
SD23 Z115 = Wix 51452 Full Flow
SD25 Z186 = Baldwin BD7060 = no data on filter

Not sure if our ryco numbers mean anything to others

Seems as if Ryco is only marketted in AU & NZ.

I have some sump photo's - is there someone I can mail them to who would like to host them

Upload them here, and I'll deal with them.

[davehoos]

oil filters.ryco is a trade name of GUD.

the old web sites i previously got specs from are now no longer reliable.many of the aust manufactures have gone and are in name only.
the problem is that over the next few years companies wil stop using the common part numbers[ref pt.no],im curently stock taking and relabeling a/c condensors with 4 or more numbers.

just been into the nissan dealer to buy a $4 -H8903[superseeds to ryco made-H8911[now -H8911AU made in southafrica or asia].this is now deleted stock and superseeds to very small $15 -53JOA.
I was looking at the new stock and D21 filters that have now been repart-numbered.