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Power Strokes
6.4 Aftermarket
Cracked blocks
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[QUOTE="BBottoms, post: 697513, member: 1421"] Bolt stretch is a factor, but doesn't have a lot to do with clamping force. Higher strength bolts/studs simply let you apply more torque which translates into a higher clamping load. More torque and more clamping force equals increased stress on the threads in the block, regardless of the material of the stud. It's possible that you could back off the torque some, and therefore the clamping force, with studs and still achieve a better than OEM clamp and seal. With the factory bolt size, thread pitch, grade and torque value we should be able to calculate the clamping force. We could then do the same with the head stud and figure what an equivalent OEM clamping load would be at a specific torque value. [/QUOTE]
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