Sd22 Pistons & liners

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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Dieselgm99
Posts:4
Joined:3 months ago
Sd22 Pistons & liners

#1

Post by Dieselgm99 » 3 months ago

I am currently looking for information on where to actually get either one 3 ring piston and one liner as My engine melted Cylinder number 2 And they now seem to be made of unobtainium my local Nissan dealer is a joke nobody in parts new Nissan made a diesel, the forklift dealers part supplier Is not wanting to sell Either a 5 ring rebuild kit or a 3 ring due to the fact of the engine is in a pickup where else can I get these parts from a reputable dealer

waynosworld
Posts:519
Joined:7 years ago
Location:Vancouver Washington USA

Re: Sd22 Pistons & liners

#2

Post by waynosworld » 3 months ago

All I have is a used 3 ring piston/rod for an SD22, I have no liners.
I see one rebuild kit on ebay, I believe it is a 3 ring, but it is made in China. :(

I have over heated a SD25 diesel engine in the past, not to where it would not run, but steam came out from under the hood on the off ramp on the freeway(dash lights decided to not work that night) and I had to keep filling the radiator, when I added water it did not spit back at me, but it never ran the same and smoked something awful, it really didn't look that bad but a guy I know looked at photos of the pistons and suggested the rings may have been damaged, I noticed when I tore it down that one of the pistons came up 1mm short of the deck, turned out it had a bent/compressed rod also, so I decided to keep it as a parts engine as I could not find a matching rod, otherwise I would have likely bought a complete rebuild kit.

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

Dieselgm99
Posts:4
Joined:3 months ago

Re: Sd22 Pistons & liners

#3

Post by Dieselgm99 » 3 months ago

Located in Ontario Canada I’m currently looking at a falcon rebuild kit Ideally just wanna change 1 liner one piston all the rest of the rings are within spec I did have a piece for my liner puller machined to fit to get these dam liners out
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Dieselgm99
Posts:4
Joined:3 months ago

Re: Sd22 Pistons & liners

#4

Post by Dieselgm99 » 3 months ago

Is the position and rod in good shape?

waynosworld
Posts:519
Joined:7 years ago
Location:Vancouver Washington USA

Re: Sd22 Pistons & liners

#5

Post by waynosworld » 3 months ago

I think the one I have here is fine, but I am not really a person that knows if a piston/rings are good, I generally ask others that know more than I do.
I do know that the pistons in that SD25 I over heated do not look nearly as good as this piston, they had vertical scratches on them, this one hardly has any scratches.
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This piston came out of an engine(SD22) that the cam broke while it was running, well that is what I was told, I do not remember if I figured out the cam was broke or if they figured it out, I took the engine apart, kept what I thought was good and scrapped the block, I sold 2 of the pistons to a guy with an SD33, I cannot remember if I had all 4 or not, I just found this one in the parts tub right away when I seen your thread and looked to see what I had, there might be another one in there but I will have to start digging to find out.

I just noticed it has this little dent on the edge.
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I know the voices are not real,
but they have some really good ideas.

waynosworld
Posts:519
Joined:7 years ago
Location:Vancouver Washington USA

Re: Sd22 Pistons & liners

#6

Post by waynosworld » 3 months ago

I found the other piston, it has more scratches between the top of the piston and the first ring on one side.
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I know the voices are not real,
but they have some really good ideas.

ziper1221
Posts:25
Joined:5 years ago

Re: Sd22 Pistons & liners

#7

Post by ziper1221 » 3 months ago

I bought a liner from a forklift supply. I think it was around 60 bucks. installed ok
1982 720 SD22
Florida

waynosworld
Posts:519
Joined:7 years ago
Location:Vancouver Washington USA

Re: Sd22 Pistons & liners

#8

Post by waynosworld » 3 months ago

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

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