Overheat coolant - SD25 D21 1987 Nissan

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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asavage
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#151

Post by asavage »

Knucklehead wrote:This may be a bit late, but I've been running with cracks between seats since I got the truck in about '92.
Ah, but you weren't having mysterious coolant loss/overheating problems either, I'll wager ;)
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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Knucklehead
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#152

Post by Knucklehead »

No. I was unable to determine for sure in so many pages, but they weren't related to his either were they? That would surprise me.
'82 standard cab 3 axle SD22 turbo
'89 int'l 9700 Cummins 444 (855 ci)
'29 HD FD export model
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asavage
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#153

Post by asavage »

Nobody could be sure. In the absence of conclusive head gasket leakage, I would have had the head pressure checked, or have pinned the cracks.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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philip
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#154

Post by philip »

asavage wrote:Nobody could be sure. In the absence of conclusive head gasket leakage, I would have had the head pressure checked, or have pinned the cracks.
You'd be ... well.

Here is just one example I've photod of SD33 (that were NA) and one SD33T guaranteed after all this reworking. This one has also has the larger cups for the larger opened for the turbo. Also notice the flyed head surface.

Image

Image
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"
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after oil
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#155

Post by after oil »

I've driven now about 900km with absolutely no overheating, no coolant loss!

But I am going through alot of oil and blowing some smoke. I'll start a new thread about that (you guys are stoked!)
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van
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asavage
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#156

Post by asavage »

after oil wrote:I've driven now about 900km with absolutely no overheating, no coolant loss!
So it seems that the gamble on coolant loss being at the head gasket was warranted . . . congratulations.
(you guys are stoked!)
I am? I didn't realize.

Right, I'm off to bank the fires.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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