The order in which you do the work is of some importance.

After removing the liner, piston and connecting rod tap the crankshaft out with a wooden block before heating the case. If you heat the case first the rear bearing will probably come out on the crankshaft. It can be very difficult to get a rear bearing off of as crankshaft. So, you want to tap out the crankshaft while the case is cold, leaving the bearings in the case.

Then, heat the case to remove the bearings.

Put the new rear bearing on the crankshaft and place them in the freezer (along with the new front bearing if you are replacing it).

Re-heat the case and press the cold front bearing in place. Then, push the cold crankshaft with the rear bearing on it into the hot case. Finally, put the prop drive on and tighten down a propeller to make sure the bearings and crankshaft are fully seated.

David