Jump to content


Photo

1985 Nissan 720 KC 4x4 ST (w/ pics!)


  • Please log in to reply
16 replies to this topic

#1 Lockleaf

Lockleaf

    Hall Monitor

  • Members
  • PipPip
  • 74 posts
  • Location:Happy Valley, Utah
  • Cars:'90 Nissan 240SX, '85 Nissan 720 (x2), '03 Mazda Protege 5

Posted 13 January 2012 - 04:55 PM

I thought I would finally post up some pics of my "new" truck. I have had it for a year but have only had it driving for a week now. As I already had an '84 720 while I was fixing this '85, my wife simply referred to the '85 as "that other damn truck" because of all the bs I have put myself (and her) through getting it going. Here's some pictures of it as it stands now, and I will follow those up with the ridiculous story of me vs. the truck.

Posted Image
You can see my rust bucket '84 in the background. It's for sale if any of you want a rusty Utah 4x4.
Posted Image
Posted Image
Posted Image
Posted Image
Posted Image
Posted Image
Posted Image
Posted Image



I bought this truck last year for $300. No transmission at all, front end torn out and left in the bed, and had not been run in over a year. Engine was supposedly good with only 5000 miles since a rebuild. Half the work to remove the engine was done as the previous owner was thinking of a V8 swap. The truck also came with no wheels or tires, so I had to borrow some to tow the thing home.

I found a trans from a guy who was parting out a rolled over 720. When I went to get that I also picked up from him the roll bar and a full exhaust (as this truck did not have exhaust when I got it either). Once I had sourced the trans, I got my friends together and we threw the trans back in and got the front end all put together and got the engine all hooked up. I threw some junkyard 15" rims and 31x10.5 tires on to it for rollers. Somewhere in here along the way I also installed a set of Z32 buckets. Most comfortable factory bucket I have ever sat in. :)

Engine would not turn. Starter just clunked. Had not even thought to try manual turning the engine before now. So, we got a big bar and put a socket on the crank and turned it. We rocked it back and forth and back and forth over maybe a 20 degree range a few times. After fighting it with the bar and the starter for an hour, we finally got it to spin free. It ran for about 8 minutes then locked back up. It was done.

I told the wife I would have to take apart the engine, but at least when I was done it would be like new. I was wrong about the new part. This was the first bottom end I had ever tried to rebuild so I knew I needed to go carefully. I had the help of a more experienced friend on everything but the most important part. I got impatient on a day I had off and he didn't and put in all the bearings and the rotating assembly myself. I took pics and asked him questions and followed the book, etc. I felt great about it. I had even taken the time to completely clean down and paint the motor and the manifolds. :) I went beyond that and took the much cooler looking valve cover off my '84, cleaned and painted it and swapped it over.

Engine gets put back together, gets put back in, we fire it up. No oil pressure. Fight that for a while and finally get another oil pump. It works. Everything seems to be ok. We tune the Weber 32/36 that I put on there, time the beasty, seems great. At this point I actually swapped the valve covers. After that I had a dead cylinder. Oddly enough it seems that some of the adhesive used to mount the PCV duct inside the valve cover was holding one of my valves open all the time. I popped that goo out of there and it worked fine, but that was just one more problem we ran in to.

I take it for it's first drive, get about 100 yards, and the engine locks up. We can break it free but it locks up after a bit again. Soon as it gets warm it stops.

Get some advice from here, yank the motor again, pop off the oil pan only to look inside. I find one rod bearing that is hashed up, come to the conclusion that it was a bad off shelf bearing seeing as how I did not actually measure bearing clearances. I get a new rod bearing and when I install it, I plastigage it, then just for safety, I plastigage the other rod bearings too. They all check out so I assume that was the problem. Motor goes back together, goes back in truck. I even go register and insure the thing at this point.

Half an hour of driving later, engine locks up on me on the freeway. Had to get a tow home. Wife pissed cuz I apparently suck and the "nice" 720 is showing itself to be a bigger piece of garbage than the crappy one.

Wait a month, pull the motor. Wait a month, disassemble the motor. My experienced friend actually took it apart for me while I was working on my yard around him. He asked me how the crank is oiled. The stupid light goes on. I put the friggin main bearings in upside down and blocked the oil passages. All of them. I did it with thought and purpose. Idiot. No oil to crank means none to rods and none cylinder sprayers. I now have a blued steel connecting rod that has been magnetized and has a bearing basically welded to it, a destroyed rod bearing journal, and next to that, a destroyed piston that had galled to the cylinder wall a little.

Now I spend a month super pissed at myself because it was such a simple mistake that had now destroyed a perfectly good core. I clean up the block and rehone the cylinders, they are ok. Then I go and get a junkyard rotating assembly, and purchase a complete new rebuild kit. I measured everything out. It was all on the loose side of acceptable. Finally get the damned thing back together and it runs like a champ now. Still some work to be done, but overall, it is now an awesome truck.

All it took was Finding and installing a transmission, installing the front end, pulling and installing the engine 3 times (plus another engine in the junkyard) while rebuilding completely twice. Man, if I'm not awesome with the front half of a 720 by now, I never will be. :) Anyway, I love this truck and (especially after all I have put in to it) plan to keep it around for a good long while.

Next up, install the grill guard I have, and rebuild the front suspension (bushings joints etc.) Followed by complete radio rewire and install.

And for those who read that whole novel, this is what my trashed crank is destined to become.
Posted Image

#2 izzo

izzo

    Datsun Mechanic

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 11,339 posts
  • Location:Seaside Or
  • Cars:80 720 79 210

Posted 13 January 2012 - 05:10 PM

st's are cool :lol:

Posted Image
http://threeinchesof...sport.ytmnd.com
Go eat a bowl of dicks
RIP Wide14u

#3 Hyspeedz

Hyspeedz

    Member

  • Members
  • PipPip
  • 71 posts
  • Location:Stanley, KS
  • Cars:1984 Nissan 720 KC 4wd

Posted 13 January 2012 - 07:38 PM

Great post. Good luck with your future plans.
Hyspeedz
Stanley, KS

1984 Nissan 720 4wd, 5sp.



#4 Skulptr

Skulptr

    Senior Member

  • Senior Member
  • PipPipPipPip
  • 427 posts
  • Location:Spokane, WA
  • Cars:1985 Nissan 720 KC, 1993 accord lx, 1986 Nissan 720 (sold), 1997 nissan pathfinder le (just sold)

Posted 13 January 2012 - 11:38 PM

Whats special about st's?

#5 elmerfudpucker

elmerfudpucker

    Senior Member

  • Senior Member
  • PipPipPipPipPip
  • 2,716 posts
  • Location:Danville,KY
  • Cars:81 720KC

Posted 13 January 2012 - 11:48 PM

Whats special about st's?


Power windows, tilt steering, better interior.

As wonderful the sound of the laughter of children...nothing beats the silence of not having any damn kids!!

 

Why should I manage my attitude if you don't manage your stupidity?


#6 Skulptr

Skulptr

    Senior Member

  • Senior Member
  • PipPipPipPip
  • 427 posts
  • Location:Spokane, WA
  • Cars:1985 Nissan 720 KC, 1993 accord lx, 1986 Nissan 720 (sold), 1997 nissan pathfinder le (just sold)

Posted 14 January 2012 - 11:23 AM

Thats it? I've got everything but power windows, what's that mean I have?

#7 Lockleaf

Lockleaf

    Hall Monitor

  • Members
  • PipPip
  • 74 posts
  • Location:Happy Valley, Utah
  • Cars:'90 Nissan 240SX, '85 Nissan 720 (x2), '03 Mazda Protege 5

Posted 14 January 2012 - 07:41 PM

I don't have power windows or even A/C, so maybe mine is a fake. :)

#8 Skulptr

Skulptr

    Senior Member

  • Senior Member
  • PipPipPipPip
  • 427 posts
  • Location:Spokane, WA
  • Cars:1985 Nissan 720 KC, 1993 accord lx, 1986 Nissan 720 (sold), 1997 nissan pathfinder le (just sold)

Posted 14 January 2012 - 07:52 PM

poser Posted Image

#9 Lockleaf

Lockleaf

    Hall Monitor

  • Members
  • PipPip
  • 74 posts
  • Location:Happy Valley, Utah
  • Cars:'90 Nissan 240SX, '85 Nissan 720 (x2), '03 Mazda Protege 5

Posted 17 January 2012 - 04:08 PM

The amount of time I sat here trying to come up with something clever to say in response to Skulptr is simply pitiful, and yet still I have nothing beyond
OH YEAH?! :fu: you too! HA!

but we all know that's weak. :(

#10 ]2eDeYe

]2eDeYe

    Bastard!

  • User Administrator
  • 13,968 posts
  • Location:Marysville, WA
  • Cars:78 620 KC, 77 620 KC, 72 CJ5, 04 G35 coupe mmmm

Posted 17 January 2012 - 05:10 PM

I don't have power windows or even A/C, so maybe mine is a fake. :)


You got the steering wheel, gauge package and graphics. Your good :lol:
Smokin' Joe's House of Datto's
Posted Image
Member- *Japanese Trucking Association*

**DATSUN FAQ** ~ If ya know it, post it ~ If ya don't know it, learn it ~

ratsun.net rising sun stickers

620 KA24 Motor Mount Swap Brackets

1977 620 KingCab Deluxe KA24DE Swap - Refresh and cleanup

Whenever I think that I'm out of my mind for putting this much time and money into an old Datsun, all I have to do is look some of your threads to know that I'm not nearly as whack as you are.


#11 Sealik

Sealik

    BAD Doctor Doug!

  • Senior Member
  • PipPipPipPipPip
  • 3,644 posts
  • Location:North of U
  • Cars:Many.....720 4x4s. '69 510/ LZ23

Posted 19 January 2012 - 01:12 PM

Power windows, tilt steering, better interior.


All my 720s have tilt...didn't realize I had it....until I bashed my kneecap into the lever....ouch

I don't have power windows or even A/C, so maybe mine is a fake. :)


STs came with a variety of 'accessories'....ordered from the factory...many combinations
Brushed aluminum on dash face.
Clock.
Oil pressure, volt gauge and tach, standard on the 4x4
Sun roof
Upgraded door panels
ST graphics
Steering Wheel.
PL
PW
I had (have) 2 STs with all the aforementioned options

#12 izzo

izzo

    Datsun Mechanic

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 11,339 posts
  • Location:Seaside Or
  • Cars:80 720 79 210

Posted 19 January 2012 - 01:17 PM

My st has blacked out interior. Oil/volt gauges, clock and tach. Upgraded door panels. Brushed aluminum trim. Thats it, no PL/PW, no sun roof, no ac. It does have a front windshield defrost wire but no switch for it? Has nice center console.

I'm fine without power windows/locks and sun roof. Less things to go wrong with it. AC would be nice for summer time, oh well! Happy with it as is.
http://threeinchesof...sport.ytmnd.com
Go eat a bowl of dicks
RIP Wide14u

#13 Sealik

Sealik

    BAD Doctor Doug!

  • Senior Member
  • PipPipPipPipPip
  • 3,644 posts
  • Location:North of U
  • Cars:Many.....720 4x4s. '69 510/ LZ23

Posted 19 January 2012 - 01:28 PM

My st has blacked out interior. Oil/volt gauges, clock and tach. Upgraded door panels. Brushed aluminum trim. Thats it, no PL/PW, no sun roof, no ac. It does have a front windshield defrost wire but no switch for it? Has nice center console.

I'm fine without power windows/locks and sun roof. Less things to go wrong with it. AC would be nice for summer time, oh well! Happy with it as is.


That front 'windshield defrost wire' is for the radio...antenna I believe.
PWs are nice when your co-pilot is a dog and is all 'thumbs' when controlling the switch... :D
DL.....not good when dog left in truck with keys still in ignition, if its paw hits one...both doors lock.
Done it...

Center console...?
My 85 2WD ST had one.....but no fittie in the 4x4 because of the transfer case shifter

#14 izzo

izzo

    Datsun Mechanic

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 11,339 posts
  • Location:Seaside Or
  • Cars:80 720 79 210

Posted 19 January 2012 - 01:30 PM

That front 'windshield defrost wire' is for the radio...antenna I believe.
PWs are nice when your co-pilot is a dog and is all 'thumbs' when controlling the switch... :D
DL.....not good when dog left in truck with keys still in ignition, if its paw hits one...both doors lock.
Done it...

Center console...?
My 85 2WD ST had one.....but no fittie in the 4x4 because of the transfer case shifter



Its not an antenna, there's one on the fender (which is broke off but there. No radio stations here anyways)

Thread jack sorry haha.
http://threeinchesof...sport.ytmnd.com
Go eat a bowl of dicks
RIP Wide14u

#15 Lockleaf

Lockleaf

    Hall Monitor

  • Members
  • PipPip
  • 74 posts
  • Location:Happy Valley, Utah
  • Cars:'90 Nissan 240SX, '85 Nissan 720 (x2), '03 Mazda Protege 5

Posted 21 January 2012 - 12:14 AM

I have never seen a factory center console for a 720. Anybody have a pic of that?

#16 izzo

izzo

    Datsun Mechanic

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 11,339 posts
  • Location:Seaside Or
  • Cars:80 720 79 210

Posted 21 January 2012 - 12:55 AM

I will tomorrow if I remember lol
http://threeinchesof...sport.ytmnd.com
Go eat a bowl of dicks
RIP Wide14u

#17 Skulptr

Skulptr

    Senior Member

  • Senior Member
  • PipPipPipPip
  • 427 posts
  • Location:Spokane, WA
  • Cars:1985 Nissan 720 KC, 1993 accord lx, 1986 Nissan 720 (sold), 1997 nissan pathfinder le (just sold)

Posted 21 January 2012 - 02:58 PM

that wire on the windshield IS the antenna, fm only. the fender mount is am only. for trucks without the windshield mount they were just integrated into the ground at the fender antenna. or in my case the A pillar antenna