Coolant leak from head bolt?

Use this stuff.....
http://www.permatex.com/products/pr...ermatex-thread-sealant-with-ptfe-80632-detail

You dont have to wait to put it together..... Hit the hole with some air, then a shot of brakekleen, put sealer on the stud and shove it back in the hole and button it all back up, and run it !!!!