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#1 |
Registered User
![]() Join Date: Feb 2004
Location: Idaho
Posts: 4,034
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Re: GMC V-12 powered '91 Chev crewcab
I can't wait to hear it fire up someday
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"Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!" |
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#2 |
Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Re: GMC V-12 powered '91 Chev crewcab
Looks like those back 3 cly's cleaned up well though - that's a good sign
![]() I say paint it - I like black myself. I think Chevy orange will be way to much on that thing (but it does appear to have been orange from the start huh? ![]()
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered ![]() ![]() ![]() Last edited by arkracing; 09-20-2007 at 02:18 PM. |
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#3 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
They were originally red, but sun faded to orange. I'm painting it red/w black accessories.
Shaft still standard and bearings were in good shape. Cylinders cleaned up real good with light honing. All the pistons are back in, except one. Something dinged it up when the head or whatever blew. Off to the junkyards to find a .30 over high altitude. Anyone have one/w rings? Finding new parts is history, so it's junkyard shopping for them. If I can get a piston, hope to be running in stand in a couple of weeks. If & when she does run, I'll get my son to post a video/w sound if he can. They have a sound all their own. Thanks for all the imput. Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. |
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#4 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
Piston: Jeffspower, I don't think I want to try this one, would you? This pic makes the piston look like it has an upturned lip near burned/broken spot. It's not, it a flat piston and the oval is raised a tad.
Truck: What year model is it? It offers more and better set-up than the crew-cab. The crew-cab has no value for this project. This truck has standard clutch set-up, power steering, bed, shorter wheel-base, would be a lot easier for air flow front to back, and keep the work/ratty look, etc. I have the option of either. Imput? Thanks, Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 09-24-2007 at 08:50 AM. |
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#5 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
Hoo-rah! The elusive piston has been found and installed.
Tried all sources mentioned above plus others. Found one in junked motor locally. Maybe reassembly can get started tomorrow. If anyone considers trying to rebuild a V-12, be prepared for lots of headaches trying to find parts. Over time, many different bores and types of pistons have been used in these motors. Matching pistons seems to be one of the golden items. Thanks for all suggestions Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 09-30-2007 at 08:34 PM. |
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#6 |
Well, Whoop-dee-do!
![]() Join Date: Mar 2003
Location: Easton, Mo. pop.- me & scarcely a few others
Posts: 2,302
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Re: GMC V-12 powered '91 Chev crewcab
Awh heck, a little tig work, some time on a lathe and a little knurling could have saved it
![]() Glad you found a replacement- sounds like you found a needle in the haystack.
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'68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD ![]() '72 K20 500 Cad/TH400/NP205 SOLD ![]() '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car ![]() |
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#7 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
Jeffspower, Your good with that tig! #10 lookin' good. Heads and pan back on today.
Thanks, Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. |
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#8 |
Well, Whoop-dee-do!
![]() Join Date: Mar 2003
Location: Easton, Mo. pop.- me & scarcely a few others
Posts: 2,302
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Re: GMC V-12 powered '91 Chev crewcab
I can't wait to hear it run! It would be cool just to leave on a running stand for a while, just so you could build all sorts of header setups to see what different sounds it would make. 6/1 collector with dual 4' pipes, 3/1 (x2 per side) with quad 2-1/4" pipes, 2/1 (3 per side) into one collector- how about zoomies
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'68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD ![]() '72 K20 500 Cad/TH400/NP205 SOLD ![]() '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car ![]() |
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#9 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,929
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Re: GMC V-12 powered '91 Chev crewcab
That is so cool looking, but my head hurst thinking about you timing it.
![]() That will be wild when you get it into the crew cab!! ![]()
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#10 |
Registered User
Join Date: Sep 2006
Location: colorado springs colorado
Posts: 737
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Re: GMC V-12 powered '91 Chev crewcab
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70 chevy lwb c10 454/th400 and a 9" rearend suicide doors, marker light fuel fill, 4" cowl , mini tub |
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#11 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
We've about reached the point-of-no-return on the motor, at least. We have a complete 702. Just noticed the hat---it was an option in '64. Still lots of adjusting, tweaking yet. Still have a flywheel-starter problem to iron out. Just take some more shopping.
Plan to take 7-10 days off for R&R in the TT. Food for thought: As said early in this project, there's no telling where this project would lead. I bought the '62 GMC from a long time friend last night. He bought it new and still has a good title. Good titles are valuable property in our state. The crew-cab as well as the 78? chev yellow flat-bed, titles are possible, but a hassle. Based on ya'lls imput, local availability, and cost, why not take the frame and bed from the '78?, graft the cab and front clip of the '62 GMC? I have access to other pickups of the same vintage for the doors, hood, and then it would be a smooth cab & clip. We would end up with a totally legitimate '62 GMC 1ton with a V-12? Progress: One bolt at a time Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 10-06-2007 at 11:52 AM. |
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#12 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
All V12s are not the same.
The starter was missing on this engine. Picked up couple from junkpiles. Starter drives were too short and sit too far from the ring-gear. Measured about 6-7 and they were the same. Finally measured flywheels, mine was 16 1/2" diameter, and for a double disc clutch, the rest 15 1/2" and for single disc. Had to spend the day changing the flywheel and housing, so the small starters would work. No telling what this engine was originally built for, and ended up new on a pump. May get to test spin on starter tomorrow, but still have to rewire around the safety switches, put propane kits in carbs, and other odds and ends before the big crank attempt. Just hope I got all the water and oil passages cleaned out. Glad I have alot of junk motors to rob and farmers will let me do it. I think they are just wondering if this thing will ever fly,-- I am too, but it's fun. One bolt at a time, then do it again- Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 10-15-2007 at 09:42 PM. |
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#13 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,929
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Re: GMC V-12 powered '91 Chev crewcab
I like the idea of it going into the 62, but either (any setup) would be cool for that!
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#14 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
It looks like the '62 will be in the end product somehow due to the title. He called today and said it was in his hand. It was last tagged in '72. He put over 200,000 on that V6, before it shucked. He's elderly and been a great friend, so pickup and motor combined will also bring back memories of many good crops as well as some bad ones.
Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 10-15-2007 at 09:55 PM. |
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#15 |
Registered User
Join Date: Oct 2006
Location: In the Indiana Corn
Posts: 449
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Re: GMC V-12 powered '91 Chev crewcab
I wish I could come across one of those engines. Just watching yours take shape gives me images of one installed in a lengthened T-bucket frame. I can just see it now with four chrome valve covers...
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1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels ![]() Who needs a car when they make crew cab trucks? |
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#16 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
They are really durable, easy to work on, simple, except ignition, then it's not bad after learning the sequence. Left cap feeds left bank, Right cap right. If one side quits, it will run on 6 cylinders. Anyone here who has used one talks about them like an old favorite workhorse. They sure like fuel, tho.
The T-bucket with engine out in the open would make one whale of a show-piece. The main disadvantage is dealing with the weight of them and tranny. I'd like to see someone build one like that. I like to watch your beast develope. It's going to be a nice one. Keep twisting those bolts. Thanks to all for your support, ideas, and comments. Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. |
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#17 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
The V12 project needs to be postponed due to family illness in Az.
All prayers and good thoughts are appreciated. Thanks, Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 10-19-2007 at 10:43 AM. |
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#18 | |
Registered User
Join Date: Feb 2007
Location: Marana, Arizona
Posts: 3,416
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Re: GMC V-12 powered '91 Chev crewcab
Quote:
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"I feel the need for speed!"... as soon as I am done with my nap. |
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#19 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
Man, Storm-Chaser, I'd appreciate that.
I don't have any pic straight from the side of them, but as soon as I get home, I'll get some. When I worked on the other projects in the past, I'd buy a model, paint, change, and fiddle with it 'til I got what I wanted, then sit it on a shelf in the shop. Made a good incentive to keep going when I would get stumped. Thanks for the offer, Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. |
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#20 |
Registered User
Join Date: Sep 2006
Location: colorado springs colorado
Posts: 737
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Re: GMC V-12 powered '91 Chev crewcab
Best wishes to your family!
Frank
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70 chevy lwb c10 454/th400 and a 9" rearend suicide doors, marker light fuel fill, 4" cowl , mini tub |
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#21 |
Registered User
Join Date: Oct 2006
Location: In the Indiana Corn
Posts: 449
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Re: GMC V-12 powered '91 Chev crewcab
The engine can wait... family illness cannot. Please relay my best wishes and prayers.
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1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels ![]() Who needs a car when they make crew cab trucks? |
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#22 |
Junior Member
Join Date: Dec 2006
Location: Guymon, Oklahoma
Posts: 2,040
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Re: GMC V-12 powered '91 Chev crewcab
Sitting in Az.
Health issues stable, so leaves time to think about project. Good therapy. I'm thinking of using the crewcab frame & running gear, maybe need to shorten it some. Use the 9' flatbed from the yellow truck. Maybe add tool boxes under it. Trying to get a Western hauler look. Do our best not to raise the truck any higher than a typical one ton, even lower it just a tad. I'm not a young as I used to be. Use the '62 gmc front clip and cab. Extend the hood and rear of fenders BACK 24-26" and mount the cab 24-26" back giving room for all the engine to be under the extended hood. That would allow the cab to remain stock, tranny in conventional location and the engine could all be seen with hood up. I'm trying to picture that combo, but seems fairly easy to accomplish. I wish I could get a picture in my mind of what that long low critter would look like. What's the flaws in this line of thinking both mechanically and over-all appearance? When it's finished to be as safe mechanically as the '97. It's easy to see alot of you guys ideas is coming into play here. Thanks, Cayoterun
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Cayoterun Okla. Panhandle I think I'll do it myself and pay the extra $500. Last edited by cayoterun; 10-29-2007 at 10:59 AM. |
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#23 |
Registered User
Join Date: Oct 2006
Location: In the Indiana Corn
Posts: 449
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Re: GMC V-12 powered '91 Chev crewcab
Do you have any dead-on side shot pics of the truck? If so, I can come up with something crude to maybe help visually. It wouldn't be professional- I use MS Paint, and have no idea how to do the things the photoshop wiz's do. It'd be similar to what I've done with my pics in the Truck-Ouside-The-Box thread.
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1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels ![]() Who needs a car when they make crew cab trucks? |
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#24 |
Registered User
Join Date: Oct 2006
Location: In the Indiana Corn
Posts: 449
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Re: GMC V-12 powered '91 Chev crewcab
I've been wanting to do the same thing for my project, but I can't seem to find any Kodiak/Topkick models.
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1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels ![]() Who needs a car when they make crew cab trucks? |
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#25 |
Flying Dutchman
Join Date: Mar 2006
Location: Stouffville
Posts: 220
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Re: GMC V-12 powered '91 Chev crewcab
Get a toy of the Transformer Ironhide. It's a Topkick crewcab.
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94 Chevy Ext. Cab 4x4 350 (My baby) "Women carpool. Men convoy." |
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