Trouble removing Back housing

[rn240sx]

Ok guys, this is my last resort. Ive had my turbo for 5 yrs now and its been a sat night only driver so this turbo does NOT have many miles on it. I pulled the turbo off the car and the center section still looks brand new... Ive SOAKED the back side in PB-Blaster overnight and this back side refuses to budge or turn. All the bolts are out and clamps have been removed and nothing will get this sucker off.

I Even put the turbo on a vise and slammed the sh*t out of the back side (flange side) to see if i could get it to turn at least.... nothing. Then i started to hit it on its side to break it away.. still nothing

What else can i do..??

[wild_maxx]

Heat it up.

[rn240sx]

UPDATE:

I borrowed a friends hammer which was about double the weight and size of mine and all it took was one hard hit and it broke loose. Then 2-3 soft hits to break it away from the center section. For this sucker to have been to seized up in there... it was aweful clean with no residue, no oil, nothing. Still looked almost new. Anyways, i got the new 63 housing on and will be testing it 2morrow. Im sure i will start to get lag now, but oh well... it will be worth the top end gain..