[Paul R.]

It’s a used vehicle purchased not too long ago, in overall exceptionally good shape — it wasn’t MY lack of proper maint, and not really even the prev. / orig. owner, as the maint. records look good: It was just some gorilla in a shop, as other have noted...

BTW, “ALL”,the main bolts that attach the entire caliper assy. to the vehicle are locked too: Had thought of removing the entire assy. to get better access to the caliper pins, but, no such luck.

[mad_as_he$$]

I am not as flexible as I once was. I pull the whole spindle assy out so I can really get hold of the stuck parts. Ultimately that saves time for me.

[mrsmith]

“BTW, “ALL”,the main bolts that attach the entire caliper assy. to the vehicle are locked too: Had thought of removing the entire assy. to get better access to the caliper pins, but, no such luck.”

I recommend removing it anyway. It’s how I remember doing it. And don’t use a flame under a car unless you are absolutely sure you can do it safely.

As for what you’re attempting: use a pick or sharp pointed chisel to scrape away any corrosion, dirt at the base of the heads, clearing a path for the penetrant to get to the threads. Good luck