Do you heat the nut or the bolt?

Heat everything, cool the stuff you want to shrink, remove stuck nut/bolt. A fastener is not freed just by heating it. As in, you can’t make it glow, then walk away for an hour, and expect it to turn when you come back. The parts will only turn when they’re hot.Click to see full answer. Keeping this in view, does heating a bolt loosen it?When the bolt is heated, it expands. Since the shaft of the bolt is constrained, it can’t expand inside the hole. As the bolt cools, it contracts. The contraction, however, is not constrained.Also Know, does wd40 loosen bolts? WD-40 penetrant spray not only helps in loosening the rusty and stuck nuts and bolts, but can also help in keeping them safe from getting rusted again in the future. Getting rid of rust from nuts and screws and loosening the stuck ones can be an arduous task. Similarly, you may ask, how do you loosen tight bolts and nuts? How to Loosen Nuts and Bolts Spray the nut with penetrating oil and let the oil sit for 10 to 15 minutes to penetrate the threads of the bolt. Hold a hammer against one side of the nut, and hit the other side with a second hammer. If the nut is badly rusted, pour hydrogen peroxide on it to dissolve the rust. How do you unscrew something tight? 9 ways to loosen a tight jar lid Rubber band. Improve your grip on the jar by placing a wide rubber band around the rim of the lid. Rubber gloves. Similarly, instead of using your bare hands, pop on a pair of marigolds to boost grip. Water hammer. Hot water. Hair dryer. Tap it. Dent it. Pry it open.