Head Bolt, Stud Torque Tech Tip - Importance of a proper washer - Interesting

gzig5 said
I don't know what was used but there is marked difference in the result. I disagree on the thin washer of proper heat treated steel. It would provide the extra surface area that will prevent damage to the aluminum at reasonable force/torque levels. On the other hand a wider thick washer would be better and after I correct the bolt seats. I'll turn some up on the lathe and heat treat them in my oven if the ones in the new kit aren't satisfactory. I have a feeling that no washer was used or it was locked to the bolt and turning based on the markings I remember. I don't see how it is from compression only.

I'll try to post a pic or two if I have time tonight.
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Well, look at the washer under the bolt for the damper... it is as thick as it is for one reason only: To not distort when you put that 135 ft lbs of torque on the bolt. You can only do so much in terms of strength increase with hardening.

You're probably right....I'd think any compression problems would show up in how the material is distorted nearby. Seems like the 'pad' would become shaped something like the top of a glass soda-pop bottle if is did.

Having that lathe is great... I hope I can follow you soon. I'll see your lathe and raise you a mill LOL