The case should be hot enough that if you put a drop of water on it itll boil off,212degrees,Ive seen a Pro Circuit use a hot plate at the races and he had to drive the bearings in.Did you put the bearings in the freezer?They need to be cold and even then you may need to press them in or use a big socket on the outer race and a hammer.DONT let the seals go past the oil drain holes in the case,they should be flush with the bottom of the hole,and use grease on them.