Exhaust Leak or normal noise?

[Ariel Red Hunter]

Originally Posted by hertz9753

It took me over an hour just to drill out the stainless steel header mounting bracket with a 1/2 inch heavy duty drill. It's old and slow but I did use a 1/2 inch cobalt bit. It would be better to take it to a machine shop to have it done.

I used to drill stainless steel shafting at the boatyard I worked in. I had been taught to use evaporated milk for a lubricant. Apparently the casien in the milk is what kept the drill from burning. I was drilling a vertical rudder shaft, so had to pull the drill out every 30 seconds or so, and dip it in the evaporated milk.