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Old 07-18-2009, 08:20 PM   #1
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head bolt size
What size are they, 7/16" x20 ?
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Old 07-18-2009, 09:01 PM   #2
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Re: head bolt size
No. 7/16-20 is fine thread. For a tap to clean out the threads in the block, you need 7/16-14 which is course thread.

To replace the bolt, a proper head bolt needs to be used.
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Old 07-18-2009, 10:35 PM   #3
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Re: head bolt size
Alright thanks i just needed to know so I can buy a chaser.
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