Here is a weird trick I read, I thought from here.
Get some rope, and push as much as you can through the sparkplug hole in
number two or three when it is just starting to come up towards the top of
its stroke. Then turn the engine over and the piston and rope should push
the head loose without damaging anything.
I've never tried this, but it makes sense
----- Original Message -----
From: William M. Gilroy <firstname.lastname@example.org>
To: midgets <email@example.com>; mgs <firstname.lastname@example.org>
Sent: Thursday, November 19, 1998 9:33 PM
Subject: Re: Got my manifolds off, but the head is stuck
>William M. Gilroy wrote:
>> I now have the following off: both manifolds, valve rocker, water pump,
>> and all 10 nuts holding the head, but the head is still stuck tight.
>> Here is what I have tried:
>Almost everyone has suggested that I remove all of the studs then try to
>remove the head. So I headed home and gave it a try. I used two nuts
>screwed together to unscrew the studs. This worked fine on 7 out of 10
>of the studs. The last three are really stuck. I spray some PB blaster
>on them and walked away. I really don't want to break one of these studs
>off in the block. That could only make my problems worse.
>My questions is this, just how much force can I apply to the studs before
>breaking them becomes an issue? Or if someone has a better idea on how to
>get them out let me know. Anyway thanks for all of the advice on getting
>William M. Gilroy