JB Weld has saved me a couple times. I broke the ear off a thermostat housing on an '86 2.8 firebird. You can't get these housings anymore. I used the JB Quick too, because I needed it fixed ASAP. It lasted for about 6 months, until I was able to get one from the junkyard. No leaks either. I probably could have left it.
Sweet car, by the way
__________________
|