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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old February 1st, 2018, 03:54 AM
Otto68 Otto68 is offline
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Default Head gaskets 351

Greetings

I am in need of some info more than anything. I am in the need of head gaskets for a 351.

What I have as of now.

I did send my gaskets to Cometic Gaskets to see what they could do and that would be copper. To do a multilayer set would be crazy expensive mostly because of the tooling and they cant do a felpro style for some reason I don't remember. I don't mind copper but I really don't want to ring the head and block.

So besides begging Bobdylan to split up his set does anyone have any other avenues they went with in the past or working on at the moment for head gaskets?


Just in case someone is wandering it is around 250$ for the set.
I also sent them Magnum intake and exhaust gaskets to reproduce. Well, to be honest, I sent them every gasket I couldn't get from eBay to remake. Just waiting to hear from my builder on a thickness for the gaskets before I get everything made up.
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Old February 1st, 2018, 02:20 PM
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ilvracn ilvracn is offline
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Default Re: Head gaskets 351

Is the $250 for the copper gaskets, or the multi layer steel gaskets?
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Old February 1st, 2018, 02:45 PM
Otto68 Otto68 is offline
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Default Re: Head gaskets 351

For the copper. I wish multilayer. With tooling, I think he said it could be upwards to 1000 for the first gasket.
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Old February 2nd, 2018, 04:40 AM
jagarra jagarra is offline
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Default Re: Head gaskets 351

Have you contacted Thunder V12, those motors used 4 351 heads, they may have head gaskets available.

mail@thunderv12.com
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Old February 2nd, 2018, 01:39 PM
Motiv8 Motiv8 is offline
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Default Re: Head gaskets 351

Are your orig gkts asbestos sandwiched in copper? David
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Old February 2nd, 2018, 02:33 PM
Otto68 Otto68 is offline
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Default Re: Head gaskets 351

Yes they are but the one burnt through to the lifter.
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Old February 2nd, 2018, 02:35 PM
Otto68 Otto68 is offline
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Default Re: Head gaskets 351

I did try to contact Thunder and I didn't get a reply back. I went there before I tried here.
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Old February 2nd, 2018, 07:50 PM
massey478 massey478 is offline
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Default Re: Head gaskets 351

$1000, really? Must be for dies, etc. to make a 'sandwich' gasket. I made an ACAD drawing of a Toro Flow head gasket and submitted it to a local shop for water jet cutting quotes. They can take the ACAD drawing and enter it in their cutting machine using CAD/CAM process to cut them out of soft copper sheets. The cost per gasket would be less than $90, less if they can stack cut them. The same could be done with virtually any head gasket. I would make sure the heads are flat and tie them down with ARP bolts. Nice thing is the copper gaskets would be re-usable!

Last edited by massey478; February 2nd, 2018 at 07:51 PM. Reason: Add info
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Old February 3rd, 2018, 01:59 AM
Otto68 Otto68 is offline
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Default Re: Head gaskets 351

They said tooling (whatever that entails)would be the most expensive part and since there isn't a market for them I would get hit with the cost. If I remember right it would be under 400$ for every other gasket. The copper being reusable is a plus but I really don't want to put rings in the head and block. It would be a 48000 thick copper gasket for under 250$ including shipping. They said I don't need to use rings but they recommend it.
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Old February 3rd, 2018, 01:03 PM
Motiv8 Motiv8 is offline
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Default Re: Head gaskets 351

Otto, I've been a special eng builder 65yrs now. Most recent custom made 4cyl copper clad asbestos gkts looking just like those of yrs ago were prox $155 ea. Copper edge at cyls and water holes rolled back professionally. I'm not easily satisfied. Some of my engs and rebuilds are 100 grand or more. Everything has to be perfect. I can highly recommend Molina Gaskets. Google and talk to Joe. A pleasure to work w/ him. I make my own custom templates for him, but you may want to send a decent or new gkt to copy. I request one, see how it fits, then order another half dozen, sometimes w/ minor mods. Hope this helps. David
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