The hot plate section of an old Mr. Coffee machine works pretty well for heat-expanding parts. I've had one around the shop for several years for such chores. Pistons for Volkswagen air cooled engines used to need to be heated a little so the wrist pins would slip in easily. A toaster oven purchased from a flea market or yard sale would be another way to avoid being the target of the boss lady's wrath for stinking up her oven!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!