What PSI to take off top strut nuts?

[TheSalad]

I searched, and found a few threads talking about people using impacts to get these nuts off. I have a 115psi compressor, but these nuts wont budge. Also, the nuts on the new struts, they wont go on very far, what is up with these things?

What PSI do I need to get these nuts off and on?

 

[BennyBlown2v]

There are notches in the top of the struts, sometimes even a place to put a hex key. You put an open ended wrench on the strut nut then a screwdriver/hex key in the top of the strut, rotate, ta'da!

 

[TheSalad]

Right, mine is just a slot. I bought a "drag link socket" which is a big screwdriver blade..but still, no dice. It is on tight. I just sprayed it down with PB Blaster, and will try it tomorrow again with the impact.
The problem with the drag link socket is that I need someone to hold down on it, to keep it seated, or I will ruin the groove, and I need to get a wrench that I can fit a cheater bar onto..the nuts are on there way too tight.

Also, o nthe struts I have, the nuts wont thread on very far. Upon closer inspection, it looks like I need some new nuts, the threads arent so great. I will go to Ace and get some other ones, but what if they dont go on? Bad thread on the struts...get new struts I guess?