Exhaust flange nuts. '03 Wide Glide with SE slip-ons, to be replaced with full system. I'm sure the original head pipes have been on for 20 years, and the top flange nut on the front jug barely moves. Soaked it, heated it, and a loud squeak as it moves fractionally. About an 1/8" turn right and then loose. Not making progress. I anticipated the it would break free by now. I scored the end of the post so I can see if it's moving and it hasn't. The nut has moved just a touch. Have it another soaking with PB Blaster, gonna try again tomorrow.

Afraid I'm gonna snap the post! What works for everyone else?

 

BE PATIENT and keep soaking, trying and re-soaking. Time consuming but easier than pulling the head off and taking it to a machinist.

 

let it soak and then tighten then loosen...tighten then loosen.

 

Try using Automotive Automatic Transmission fluid.
The ATF seems to work better at dissolving stuff like rust and road goo and does not damage paint.
Use a little squirt bottle, dropper, sprayer or whatever to get ATF into that area.
Keep in mind that if ONE flange nut has already been removed then entire exhaust unit might be applying pressure on that one remaining bolt.
Note: Sometimes you need to lubricate the other exhaust flange nut and put it back on to relieve that pressure.

 

Find someone with a brazing tip for oxy acetylene torch. Pin point heat , red hot, will take it off.

 

Spray some penetrating lube on the stud at the head.

Better that the stud spins out vs breaking.

 

This ^^^^, you've already got it moving. Little bit at a time may take a day or three, but it will come

 

Also this

 

Update?