Many times this is caused by a crack in the block in the stud hole.
The manifold side rear one seems most prone to that.
As Randall said, don't use lockwashers, use good hardened washers. I
like the ARP head stud kit myself, but that's for a racing application.
- Tony Drews
Quoting LT <llst@shaw.ca>:
> Removed and replaced the head gasket from the engine as I was
> experiencing white fog from the car that I had purchased last year.
> Suspected it was #1 cylinder as I had seen some steam come out when I
> pulled the plug.
>
> Finished the assembly today and while doing a pressure test on the
> cooling system noticed that water was seeping out from between the
> cylinder head nut/washer and the top of the cylinder head on the #8
> bolt (front left).
>
> I had reinstalled the lock washers that the previous rebuild had used
> even though I had read that one should only use flat washers. (many
> articles indicate a lock washer works as well as a flat washer so ???)
>
> Decided to torque down the head a bit more to 120 # but this resulted
> in the #8 head bolt thread stripping at the nut. (A bit of relief when
> I pulled the bolt out)
>
> I had used copper coat spray on the head gasket; at least four
> dressings of it.
>
> Could not see any out of place water marks on the old gasket.
>
> Anybody have any thoughts on this one?
>
> Larry
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