Jack Shaft
BANNED
Ifs and buts will drive you nuts..sounds like you have a coolant leak..fix it
Might not be so bad. Someone might have put a bolt in that was too long or something along that line and knocked the back of the blind hole open into the water jacket. Pull the bolt out and clean the threaded hole up and seal the coat the threads in the bolt hole and the bolt with Indian Head Shellac or Silicone gasket maker and put it back together again. Wait 24-48 hours and give it a go.