I am installing a new cat on my 2000 Honda CR-V and the exhaust donut is leaking. I had to reuse the old one, because the new one was slightly larger and didn't fit on the exhaust flush. Two questions, is it ok to drive the car for a little while with a leaking exhaust donut(it is leaking all over the gasket)? Secondly the donut is literally leaking all over, is that normal for a bad donut to leak all the way around?