Originally Posted by DarZeelon
Yes, it is possible to 'trick' the lower mass bearing, to heat-up and expand more than the higher mass crankshaft; thus making it slightly looser on it... But these techniques cannot be considered general practice and are not applicable for everyone...
outside the model engine world it is common practice as bearings are more often than not fit tightly on the shaft/spindle and relatively loose in the seat/bore. if a bearing needs to come off with no damage then the proper application of heat is often the only way to do it.