08-25-2003, 10:27 AM
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CC Member
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Join Date: Mar 1999
Location: Murrysville, PA, USA,
Posts: 33
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Not Ranked
Head Bolts Size 7/16 or 1/2
I am building a new motor for the Cobra. I have had head gasket problems and was going to increase from 7/16 to 1/2 bolts or studs.
What is the process to do this? If I place the block on my bench and tap the block for 1/2 bolts, the original diameter of the 7/16 threads is greater than the minor diameter for a 1/2 threads. The major and minor diameters do not work out. The thread depth will not be what it should be.
Am I to concerned about this?
Fred
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