Travis92se

iTrader: (2)

When we are talking about warpage of the exhaust manifold, will it be noticeable by the naked eye, or will a small difference easily break my new studs?

Wiking

Use absolute straight liner (or surface), place it flat on the sealing surface. Place light behind and see light if warped. Maybe needs machining?

If u suspect, take into machining shop for evaluation. Warped exhaust manifold will not last long before leaking.

CandiMan

iTrader: (1)

Are you saying your new exhaust studs broke and you're curious to know why? So you're wondering if a warp exhaust manifold can caused a new stud to break.

Is it possible a warp stud can cause a stud to break, yes it's possible
How likely that's what caused your broken stud, not likely

I think a excessively warp manifold will cause more problems before breaking a stud. Problems like blowing out the exhaust manifold gasket, engine performance, etc. If your new studs did break I'm curious to know how long have the studs been in?

Jeff92se

iTrader: (82)

I've put a straight edge on all my exhaust manifolds from engines that have had/had not broken studs. None of them were warped. I in fact have not even read about someone actually having a warped one.

But I do suspect that as the manifold heats up it expands and gets WIDER (not warping), then contracts (shrinks). The seems to bend the stud back/forth until one day it just breaks. One can only bend a wire so many times before it will fatique and break. That's my idiot theory anyway. Would kinda explain why the outer most studs seem to break frist.