Quote:
Originally Posted by daniloneil8
I don't think BRZ is known for stripping threads (user error) The studs are known to be weak, I thought. I've had a nut seize onto a stud, and I head to shear it off with a breaker. No way it was user error. I hand tighten all lugs, and then use a torque wrench. Never an impact.
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All OEM studs are weak. They're cast iron...
Here's a list of studs I've broken by hand, via breaker bar:
OE Nissan
OE Toyota
OE Subaru
Nismo
ARP
The question of how it breaks/shears is a question of what caused you to put so much torque on it that it breaks. Keep in mind that you're supposed to tighten the lugs to around 80-90 ft-lb of torque, so if it stops moving and you're still applying torque, it will break. 80-90 isn't a lot of force if you're doing it right, especially if you are using a longer breaker bar or torque wrench.