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Q:

I have white smoke coming out of my exhaust. I've tried Bar Leaks, K-Seal and on 1996 Mercury Cougar

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Blue Devil. What is the problem none of those worked.
(1) Answer
I say bad head gasket! Have a combustion leak test performed to confirm.
Most any repair shop can do this. And it leaves no doubt as to weather it is a head gasket or not!!