I'm positive it's an external head gasket leak. What should I ask when getting estimates? I want to make sure I get the right head gaskets. Should I order the Subaru head gasket kit myself and ask the mechanic to use it? I know the kit comes with lot's of other gaskets, seals, etc. Will the person working on my car for sure use everything in the kit? What about a clutch? Should I order one too and ask the mechanic to use it? Or should I let them do all that? So between $1,500 and $2,000 is a fair and reasonable price for the head gaskets, timing belt, and clutch? I know it's a lot of questions, but I appreciate any help! Thanks!