Hey all, I'm thinkin about putting a set of headers on when I have the 85's front end apart. Problem is, I know on most things, (like old tractors) exhaust manifold studs can snap right off, then you'll be sitting there for hours with trying to remove broken studs. I dont know if this is the case with my trucks 350...it IS a plow truck so it might make matters worse. Help!
<font face="Comic Sans MS">WD40 is junk. Get PB Blaster, Liquid Wrench, Aero Kroil, etc... Soak it for several days... Every couple hours, whack the fasteners with a hammer and re-apply the penetrant. After several days of this it should come out a bit easier... When re-assembling, use high temperature anti-seize. It'll make your life so much easier after next time something needs to be removed...</font>
Those idea's that time said was pretty good. Only try heating up the engine untill its good and hot and then shut it down and spray on the liquid wrench. Do that a couple of times and then when you are ready to take them off they will come out with ease.
What happens when you heat them up is that because of expandage and shrinking from really HOT to COLD when you spray on the liquid wrench it will penetrate deep into the threads.
If this doesn't work nothing will other than using the torch and getting them read hot which you shouldn't do because the chance of hurting the block.