Best thread sealant? Machinists out there?

I may try silicone but is there another type of compound that would provide a better seal if I squeeze it into the threaded holes?

My "good" neighbor who is an expert about everything including everyones personal lives, and has no interest in how much people make and doesn't brag about how much he buys and has no opinion about anything told me to visit a mcahine shop and tell them becasue there are special compounds for that. Any ideas what he may be referring to?

If oil is coming out the bolts you have a leaking head gasket in the pump and putting thread sealing/locking compound on them is just going to "compound" the problem when you try to get them out.

Buy a repair kit and fix the pump. There are two gaskets under the head of the pump. One is against the casting of the pump housing and the other is against the head housing and is hidden under a stainles steel plate that has a screw in the middle of it. There is a small cutaway in the edge of this plate that is there so you can get a screw driver under the plate to pry it off.

Somebody in the past may have done some inspirational mechanicing on the safety relief valve that has caused the pump head gasket to blow. If the safety relief valve does not open at the desired pressure and stays closes something has to give and if you are lucky it is the system relief valve or the head gasket. If you are unlucky it is the camshaft etc.