In Reply to: Re: bad ringgear posted by Bruce(OR) on January 30, 2019 at 12:07:20:
Convincing the wife to "cook" a ring gear in the oven wasn't as hard as I thought. She got curious about the process when I showed her the interference fit and explained that heating the ring gear would make it expand enough to just slip on. For the final attempt she broiled the thing until it was as hot as that oven was going to get it. The flywheel was just outside the door sitting on the deck. All I had to do was grab it with vice grips take two steps and drop it on the flywheel as she opened the door. It's a miracle neither of us got burned doing that little dance. She was more disappointed than I was when it didn't work. Later I carefully measured the ring gear and flywheel, did some math, and figured it would take a differential temp. of 600 to 700 degrees. I suspect the actual as-found dimensions of flywheels and replacement ring gears varies enough that it's a coin flip whether a household oven will do the job. Some of the ring gears have also come loose and people have had to tack weld them to the flywheel.