Instead of using grease on the bolts, next time try anti seize. Great product. Next time the bolts will come out much easier. Been using it for many years, the stuff really works. Never had a problem removing even water pump bolts when I use this stuff.

Disclaimer: No affiliation with Permatex or Antiseize

For existing rusted bolts, I squirt a product called "PB Blaster" on them a day or so ahead of trying to remove them. It really helps.

 

+1 good advice.

I learned this one the hard way when assembling some fine thread stainless steel bolts into stainless threads. I put it together dry (dumb kid)... turn, turn, turn, squeak... uh oh.

It may as well have been welded in. A little dab of molybdenum based anti seize goes a long way.

 

Works like a champ.

Silicone paste is my next favorite for clear applications.