rear coolant flange question

[AndreiMTM]

I've been working on my rear coolant flange and so far I have to say that it is one of the biggest pita(worse than cct/tbelt imo). Anyways, I can't seem to get the rear bolt off. I got the nut off, but I can't get that bolt itself to remove the coolant flange. Any tips/tricks on getting this out?

[KHARDa4]

Quarter inch drive with shallow socket. Remove the combi valve should give you more room.

EDIT : You could always pull the motor :)