Heat and try some penetrating oil

heat most likely locktited....

if you have the socket allen wrench instead of a regular on heat it a little like others have said and also with the socket installed in the head of the bolt hit the socket with a hammer a few times and try to rock it back and forth as in loosen-tighten-loosen-tighten-etc. If they are locktited the hammer whack will break it free a lot of times along with the rocking

Try one of these with proper hex socket, maybe add heat.

https://www.harborfreight.com/6-bit-...ase-64812.html

I would try Pb Blaster, works well for me spray...wait.. spray...shock....loosen. If not heat it

If heat don't work you can use a air hammer adapter. Like a mac AH5512. Run the air hammer while putting steady pressure with end wrench.

Lubes/sprays don't help. They can't get in between the two surfaces. It's the surface area of the conical head that makes the two pieces stick to each other.

The people who have said heat are totally correct.

I deal with a bunch of these every winter on snowmobile secondary clutches. Conical headed screws into aluminum also.

A regular old benzamatic blue torch makes quick work of them. Somewhere near 60 seconds each on the head of the screws will make them real easy to get out. Once you do a few the rest will be even easier as you get the torch time more dialed in.

Thanks to the all of you , that is what I was thinking , heat.

Thanks again.

This penetrating oil creeps into a millionth of an inch. Works great. Google Deal Google Deal