Bolts break easier in winter?

[Bigsyke]

Ive broken a few key bolts this winter with very little torque supplied.

Is it true bolts snap easier in freezing weather? Just snapped a manifold stud at 20lbs of torque

[480sx]

Yes thats true. Your stud was still weak to begin with though.

[anotherblusi]

theres probably some validity in that, but with exhaust manifold studs its most likely due to the stud becoming brittle from heat cycling and stress. I highly recommend changing all the exhaust studs out for new ones if the head comes off.

[atutt]

theres probably some validity in that, but with exhaust manifold studs its most likely due to the stud becoming brittle from heat cycling and stress. I highly recommend changing all the exhaust studs out for new ones if the head comes off.

Bang on.

If you live in a place that is subject to below freezing temperatures. Your bolts will go through a ton of stress from heating up and cooling down.

So if you're going to work on your car... It might be a good idea to do it inside where it's warm if you can. lol.