This has been a slow frustration trying to get to my tensioners!
Using a normal puller (bolt is already out) and I cannot get the pulley to budge. I have left it with tension for a few days. I have put heavy tension on and off for an hour. I have bent 3 bolts on the puller working on it. I have used percussive influence on the pulley ( working around the edges) with a 2x4 through the grill area, smacking it with a hammer. I've used penetration oils and sprays. I've done this with three cars in the past and never had this amount of effort needed. Heat has been the only avenue I haven't tried yet, as I have no idea the rubber content in this general area.
What say you folk? Heat it and beat it? I'm open to any and all ideas!

 

Soak it in wd40 or similar and then apply as much pressure as it is safe for the bolts, leave for some time, release pressure and hit pulley back inward, apply pressure again wait some an hit inward again, rinse repeat till it releases. it will take quite long time but eventually will work out
Due to conical collar applying only outward pressure does absolutely nothing and only locks the thing in place but applying pressure and releasing moves the collar tiny bit by bit till it holds no more
...and don't get mad at your pulley, i actually dented mine while trying

 

Jaguar issued a TSB decades ago.
Just pull the damper a few MMs and strike it to loosen.

5. Hold the crankshaft by holding the torque converter with a lever, as described in the manual,
turn the bolt using a 24 mm socket and bar, to move the damper and collar 1 to 2 mm
forward on the crankshaft.
6. Remove the tool from the damper and then pull the damper forward and off the crankshaft:
if necessary, lightly strike the damper to loosen it.

 

I had to heat the collar and damper with induction heater to get it loose. Without heat it did not budge at all.