Just adding so OP is sure. Patriot is referring to the case as far as heating is concerned. Have read that 250f max on steel or heat can change monecula(?) composition. Pay to check alloys heating tolerances. dieselss is spot on with freezing the part you are inserting, pretty sure a shop would use liquid nitrogen, but that may be for time constraint concerns. This process is sometime used for putting bearing races (cups) into wheel hubs, where you freeze the race and heat the hub.