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Old 03-18-2011, 07:50 PM
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2door 2door is offline
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Join Date: Sep 2008
Location: Littleton, Colorado
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Default Re: Nut Sizes on Cylinder Head

Acorn nuts can and will bottom out. I replace them with shouldered hex nuts for that reason. In fact I would say that most of the factory installed acorn nuts are too shallow for the purpose. What happens is the nut bottoms out then there isn't enough thread on lower end of the stud to properly tighten down the cylinder head. I've found too many to discount this as just a rare occurance. The acorns are pretty and make for a nice look but they are unreliable as a proper cylinder head fastener.
Here's an old thread that talks about this subject>
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"

Last edited by 2door; 03-18-2011 at 07:55 PM.
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