I have read that boiling coolant means a bad head gasket. I have a 99 SVT Contour and I am wondering what else MIGHT it be. I haven't looked into it any farther than searching on the web, because I noticed it pulling into work today. Things I am going to do:

Compression check
Water pump replacement (hasn't been done in 156,xxx miles)
inspect coolant and oil for contamination of the other.

Is there anything else I should be checking while I'm at it?

Thanks for the help all