Coolant seeping from #5 ex. port bolt hole??

[CaddyCrosley]

I don't believe you have answered the question of whether or not it is still leaking out the bolt hole if there is a block full of water.
Greg Surfas

There isn't any actively seeping from the hole, but I can't tell if that's because it isn't a leak or if the level in the engine dropped below the point that would make it leak. The freeze plug seepage is a definite issue. I will try hitting the #5 and #3 cylinders with air and listening for leaks from the bolt hole.

 

[Cadiac]

If coming out of exhaust bolt hole, highly likely you have a short crack from water jacket to head bolt hole. its not going to a cylinder. One of my race engines does it in three places. got kinda warm at some point. I'm gonna run it till it needs redone. Sucks but won't hurt. Have heard others use a GM additive for a remedy but I don't use that stuff.