6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > Builds and Journals


Builds and Journals This is where the magic happens. Photograph & document your GMC build progress for posterity.
NOTICE - Photobucket will delete your pics after a time. Use another host if possible.

Reply
 
Thread Tools
  #1  
Old July 7th, 2014, 04:49 AM
blackie9 blackie9 is offline
Junior Member
 
Join Date: Jun 2014
Location: lincoln il
Truck: v12..351m..351c
Posts: 22
Rep Power: 66
blackie9 is on a distinguished road
Default The old V-12

Well it's finally time to get started on the ole V 12 ser. # 1292. I think it was probably around the early '70,s when I spotted this monster in my favorite junk yard. I didn't know much but I new I had to to have it. I have always loved machines and engines from a very early age. It was in a wrecked simi tractor at the yard so I got started getting her free to take it home.
The story was that the truck had run into the engine of a train at a remote country location. The driver was killed and some how the engineer was also killed when the rock that truck was hauling went shooting thru the air from the impact and into the cab of the locomotive. Somewhere I have a copy of the newspaper article which I will post when I find it.
So, home it went and the disassembly began. All the usual mouse nests and standing water where there (it was sitting uncovered and a carb was broken off). Got most of the pistons free except three that are still in there. The walls of the bores even with standing water seemed to still be OK (that good metal they used) and the crank looked perfect.
After some research, I don't know how I did that back then without the internet, I found that the many of the 351 parts would be the same and it looked like I would have to break those up to get them out because they would have to come out the top, so there was a school bus in the yard with a 351 so I grabbed it too. If I remember right I ran that 351 when I got it home.
Well that was then and it got set aside (35 years) for a time because of an uncontrollable problem with collecting and restoring Minneapolis Moline tractors. Well I sold the farm and I'm selling the tractors so guess what I found. So I got the 351 down off the rack to start taking it apart and found, Thanks to this great site, that is a 351M. So I said I can't tear a perfectly good Magnum apart and it just so happened there was a 351 on Craigslist St. Louis for sale (some of you saw it I'm sure) so I got that one and started taking it apart. So far it looks pretty good.
Attached Images
File Type: jpg v122.jpg (26.3 KB, Multiple views, 25 clicks)
Reply With Quote
  #2  
Old July 7th, 2014, 05:01 PM
Funky61's Avatar
Funky61 Funky61 is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Corona, CA
Truck: 1961 Suburban 1962 GMC Utility
Posts: 1,129
Rep Power: 409
Funky61 is just really niceFunky61 is just really niceFunky61 is just really niceFunky61 is just really niceFunky61 is just really niceFunky61 is just really nice
Default Re: The old V-12

Welcome Blackie9!

Great story on your V12. Kudos for saving other V6's. How about a pic of the V12 too?
__________________
1961 GMC Suburban 305A Overdrive
1962 GMC Utility 305D
Reply With Quote
  #3  
Old July 7th, 2014, 11:14 PM
blackie9 blackie9 is offline
Junior Member
 
Join Date: Jun 2014
Location: lincoln il
Truck: v12..351m..351c
Posts: 22
Rep Power: 66
blackie9 is on a distinguished road
Default Re: The old V-12

So tell me how do you get those pistons out with that rod in the way? And another question I have been wondering about is these numbered pistons and bores. Does this mean that the pistons are not generally interchangeable?

To view some links or images in this forum your post count must be 1 or greater. You currently have 0 posts. Maybe you should introduce yourself with a new topic?

Reply With Quote
  #4  
Old July 7th, 2014, 11:33 PM
FetchMeAPepsi's Avatar
FetchMeAPepsi FetchMeAPepsi is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Edmond, Ks
Truck: 1962 4x4 GMC CECILIA
Posts: 1,724
Rep Power: 545
FetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of light
Default Re: The old V-12

The person you wanna talk to is CoyoteRun. He's got a V12 he put in a 50's model truck and stretched the front out to take it. Pretty cool! He knows alot about these V12s.

For the 351, post a question in the engines forum and someone with more brains than me will be able to answer you. I'm pretty sure you ahve to unbolt the bottom part of them to get them out though, you cant just pull em out the top. Kinda like a tooth where you unbolt the roots.

To view some links or images in this forum your post count must be 1 or greater. You currently have 0 posts. Maybe you should introduce yourself with a new topic?

__________________
Step by steps:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
__________________
If the women don't find you handsome, they should at least find you handy.
Reply With Quote
  #5  
Old July 11th, 2014, 04:35 AM
blackie9 blackie9 is offline
Junior Member
 
Join Date: Jun 2014
Location: lincoln il
Truck: v12..351m..351c
Posts: 22
Rep Power: 66
blackie9 is on a distinguished road
Default Re: The old V-12

Well this is embarrasing, I took the other head off tonight of the "parts" engine and to my surprise it was pretty clean in there too. When I picked it up it was sitting out in the weather, exposed to the elements I thought mabey there would be three or four good pistons. The rest would have grown in and become part of the block, never even thought of trying to turn it over. So after seeing the way it looked inside I put a wrench on the crank and you guessed it, it turned right over.
Attached Images
File Type: jpg 351-4.jpg (26.7 KB, Multiple views, 17 clicks)
Reply With Quote
  #6  
Old July 12th, 2014, 05:21 AM
blackie9 blackie9 is offline
Junior Member
 
Join Date: Jun 2014
Location: lincoln il
Truck: v12..351m..351c
Posts: 22
Rep Power: 66
blackie9 is on a distinguished road
Default Re: The old V-12

So I got this engine apart and I'm looking it over and I see the block and the pistons have numbers stamped on them. 2 are marked 5 and 4 are marked 4.

To view some links or images in this forum your post count must be 1 or greater. You currently have 0 posts. Maybe you should introduce yourself with a new topic?

Can someone tell me what this is all about.
Reply With Quote
  #7  
Old July 12th, 2014, 04:08 PM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: The old V-12

The pistons are different sizes. Usually in .001 increments . Lots of engines are this way. If you look on the oil pan rail the block is usually stamped With the same # at that cylinder. Barry
Reply With Quote
  #8  
Old July 12th, 2014, 04:15 PM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: The old V-12

Sorry to repeat the block stamping. A good old school engine rebuilder should have a piston expander. And be able to get a piston to fit your cylinders. Or measure got replacement ones and put the biggest ones in the biggest holes
Reply With Quote
  #9  
Old July 13th, 2014, 03:04 PM
blackie9 blackie9 is offline
Junior Member
 
Join Date: Jun 2014
Location: lincoln il
Truck: v12..351m..351c
Posts: 22
Rep Power: 66
blackie9 is on a distinguished road
Default Re: The old V-12

So would I be assuming to much to think that a piston marked with lets say a number 4 in a 351 engine would be the same as a number 4 in the 702 would be the same size?
Reply With Quote
  #10  
Old July 13th, 2014, 03:54 PM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: The old V-12

Probably is the same.
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
V-12 Archiver Previous Forum Posts 0 November 11th, 2009 01:58 PM
V-12 Archiver Previous Forum Posts 0 September 2nd, 2009 12:46 PM
V-12 Available Archiver Previous Forum Posts 0 January 21st, 2006 04:16 AM
V-12 Available Archiver Previous Forum Posts 0 January 21st, 2006 03:31 AM
Re: V-12, WHERE DID EVERYONE GO Archiver Previous Forum Posts 0 July 27th, 2005 01:32 AM


All times are GMT +1. The time now is 06:12 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 681711554703|1710436366|0