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John Deere Tractors Discussion Forum
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Head stud bolts

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andy

12-31-2003 16:55:50




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I am ready to replace the block & head on a late model JD Model A. What is the proper procedure for tightening the stud bolts into the block or are they tightened when you torque the head nuts? I did some measuring and it looks like the studs would be short if I run them tight into the block. I actually set head on the block and placed gasket, lead washers on studs, On some of the studs there are not enought stud threads to come up to the top of the nut. Do you put lock tight on the end going into the block. Thanks for any help.

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01-01-2004 09:36:29




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 Re: Head stud bolts in reply to andy, 12-31-2003 16:55:50  
DID YOU PUT THE CORRECT END OF THE STUD IN THE BLOCK? BLOCK THREADS ARE FLAT SO THEY TIGHTEN UP IT THE CAST IRON. GENERALY ALL THE THREAD IS INSIDE THE BLOCK OR WITHIN A THREAD OR SO. JUST A THOUGHT.



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rollo

01-01-2004 05:49:50




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 Re: Head stud bolts in reply to andy, 12-31-2003 16:55:50  
I did what you are doing to my '48A and had the same problem. I just made sure I had enough thread sticking out of the reassembled head to hand thread the nuts flush to the head. After that, when I tightened them, it doesn't matter much which stud end is drawn up. I didn't use loctite...don't need it. I did use thread sealant..some white (teflon) stuff in a tube. I remember the book saying that you have to use it or some coolant fluid can leak out around the studs.

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