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Case Tractors Discussion Forum
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Head Gasket

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2ktrott

11-04-2009 09:50:34




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I have a 1968 680B that I did the top end on. Case had 2 different torque specs for this year based on the size of the head bolts. Thanks to this forum I figured out that I had over torqued the heads. I have copper head gaskets and am wondering are they one shot deals. Since I over torqued the heads do I need to pull them and replace the gaskets or can I just loosen them and torque them correctly. Thanks

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Newton Miller

11-04-2009 15:21:25




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 Re: Head Gasket in reply to 2ktrott, 11-04-2009 09:50:34  
If you over torqued the bolts that much you better order a new set of bolts as well, you have streached the old ones to much.



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Larry Jones

11-06-2009 03:49:42




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 Re: Head Gasket in reply to Newton Miller, 11-04-2009 15:21:25  
I agree that all the bolts should be replaced if you went that far over and snapped some of them. And the gasket, of course.



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dboll

11-04-2009 12:31:25




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 Re: Head Gasket in reply to 2ktrott, 11-04-2009 09:50:34  
you aren't out anything for trying to retorque them, if the fire ring is crushed and won't seal go back to plan one and re- gasket it



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2ktrott

11-04-2009 12:38:33




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 Re: Head Gasket in reply to dboll, 11-04-2009 12:31:25  
The more I think about this, since the 1st spec was 250 ft pounds and the correct one was 150 ft pounds the fire rings are certainly crushed!! I snapped a couple bolts in the process. New heads gaskets are on order.



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WaltDavies

11-04-2009 09:55:10




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 Re: Head Gasket in reply to 2ktrott, 11-04-2009 09:50:34  
I would replace them once they have been crushed they will never seat correctly.
Walt



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2ktrott

11-04-2009 09:57:54




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 Re: Head Gasket in reply to WaltDavies, 11-04-2009 09:55:10  
That is what my gut was saying, but was hoping it was wrong. Thanks for the quick response.



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Walterdavies

11-04-2009 11:36:01




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 Re: Head Gasket in reply to 2ktrott, 11-04-2009 09:57:54  
No problem I tried that once on an old ford Flathead it didn't work then so i guess it won't work now,
Walt



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