Pesky exhaust manifold studs

[Tony Hoffman]

I always replace them all. Heat them with a propane torch first, cycling
that with your favorite penetrant or water (yes, it does work). Do a couple
of heat cycles, then work them back and forth slowly and they should come
out. I've rarely broken one off using this technique, probably have pulled
hundreds.

Tony

On Sat, Jan 7, 2012 at 3:59 PM, Kunz, Bob <bob.kunz at hp.com> wrote:

> Hello all!
>
> It was time to fix the exhaust manifold gasket leak on cylinders 1 and 2
> and of course each had one of the studs broken off inside the block. I've
> gotten one out; will begin working on the other but now a new question.
>
> Should I take out the existing "good" studs and replace them? The risk I
> see is they will break off as I remove them causing me more work vs.
> leaving as is and having them break off in the next few years. Any opinions
> on which way to go? Parts not an issue since I have all new studs, washers
> and copper nuts.
>
> Particulars... This is an '86 5Ks Avant (KZ engine), yes it's a FWD. Has
> 175K miles.
>
> Thanks!