Re: Head Studs

Posted by blue40devil On 2020/3/5 14:27:29
I use these to remove them. They are sized by the diameter of the stud and use rollers and wedge to grip the stud and don't leave the marks of the other style.

I would only heat the studs themselves and use plenty of your favorite penetrating oil, mine's Kroil. (Kano Labs, Nashville, TN) As an addition or alternative, get dry ice. Grocery stores have it around here. Pack it around the stud and let it freeze. (Use gloves because it will cause burns quickly. Theory is to have it go thru expansion(heat) and contraction (freeze) cycles to loosen it's grip.

As mentioned a good rap on the top helps, just be sure you have a nut on it flush with the top of the stud to prevent damage to the threads and stud.

You might consider using a torque wrench to avoid over stressing the stud, they are not fun to drill out.

Below is a chart location (there are others) that will give you an idea of how much torque was used to install them. For example, if a 1/2" stud was torqued to 75# initially, you may not want to exceed, say 100, before stopping and trying some of the above again.

Good luck, now if I can just get my piston out.https://aztecbolting.com/sites/default/files/AztecBolting_TorqueEstimatingChart.pdf

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