Quote:
Originally Posted by kanton
tdale4,
How and why did you heat treat the zinc freeze plugs?
Thanks.
|
The freeze plugs are made from a zinc plated soft steel
I heated them up to red hot with a propane torch and quenched them in salt water. I did this twice. then I heated them up to red hot and quenched them in used motor oil
I did this because it is suppose to harden the steel and provide a longer life by reducing the erosion that occurs in a silencer