97 Taurus EGR valve removal

Haynes Guide Section 6-17 step 14 says to disconnect egr pipe from valve. Problem is bolt is so tight I am concerned I am going to wreck the egr pipe in the process of removing the bolt. I have applied several iterations of pb blaster to the bolt, but to no avail. Ideas for safely removing this bolt?

Heat it up good, and let it cool down.


…then try it again. Then add some more PB blaster if it doesn’t go. Then some more. Tap on it a lot. Heat it up and cool it down again. Go w/ some more PB etc. etc. Patience is likely your best weapon - along with a really high quality, properly sized wrench.