Re: Sticky Starter
Posted: Sat Oct 16, 2004 4:38 pm
I've struggled with heating the ring gear with an oxy-acetylene torch and rosebud tip too. IIRC paper and cardboard burn at a temperature of about 500-600F so if you do the math it appears to work. Don't have a ring gear in front of me so I'll guess the ID is 12". 9E-6 (inch/inch degree F) is the coefficient for steel. Anyway the temperature is well below the typical temper range of about 750F for heat-treatable steels so there's little chance of damaging the ring gear.
9E-6 * 500F * 12" = .054"
Last ring gear I did was the one on my son's 383 Plymouth 70 RoadRunner. It had 60 thou of interference and the gear was huge in diameter. I could not get the gear to expand evenly with the torch. It took hours and hours to finally accomplish. There must be a better, easier way so I did some research and ran across this tale on the internet. Just wondering if it actually works.
-Keith
9E-6 * 500F * 12" = .054"
Last ring gear I did was the one on my son's 383 Plymouth 70 RoadRunner. It had 60 thou of interference and the gear was huge in diameter. I could not get the gear to expand evenly with the torch. It took hours and hours to finally accomplish. There must be a better, easier way so I did some research and ran across this tale on the internet. Just wondering if it actually works.
-Keith