bought some new gages for the wifes challenger and went to install the water temp gage but the plug is stuck so bad that when i put the 3/8 extension into the plug(how this one is made) i had a 4 foot cheater pipe on the breaker bar but the plug started to distort where the extension incerts so i stoped before i tore it up too bad
the housing is cast iron (right? ) so im too afraid to try to adding any heat from lil torch
the housing is still on the car as i dont have a vise and no way i would ever be able to put enuff leaverage on it if unbolted from the motor
so now dont know what to do??

I would heat it up if the plug is steel. If it's aluminum you have probably galled the threads. If thats the case you will have to drill it as big as you can then try and peel it out wit a chisel. -Bob

I fought this battle, as have MANY others. First off the 3/8 extention is not the right tool for the job. They really DO make a pipe plug remover (its like a really solid extention Without the detent ball, and made of hardend steel. I would recomend getting a REALLY good impact (3/4 or even bigger would be great) and try not to use any extention between the gun and the plug remover.

When all that fails, You can drill a hole through the plug, then use a hack saw blade to cut a few groves into the remaining portion of the plug--careful--don't go into the housing threads, and then tap the remaining portions of the plug into the centerpoint and they may come out.

When that doesn't work, take off the housing and heat up the are CHERRY red and remove.

Then use the opportunity to buy a new ALUMINUM housing from 440Source for about $70 (A bargain) and just replace the whole thing.