I have a honda crf 450r,i cant stop it from leaking in the little hole underneath the water pump everything is new what is the problem?

Can get a bolt insert to repair the damage thread

Put the oil in the inner chamber.

Standard antifreeze (Green) is fine. I use "engine Ice" in mine as it is supposed to help cooling a little more. The engine ice doesn't need to be mixed with water, and some "pre-mixes" are that way also, and are easier.

You need to find it, and not run it, as coolant in the oil destroys things fast. Pressure test your coolant system to find a leak. You might be looking at head gasket, or even water pump seal area to start.

yes sir the seal hole should not be oblong, was the bearing bad when you took it out? sounds like the shaft has worn out the hole.

if its the overflow it will be a tube that goes to the overflow tank, if its coming out the small hole in the alloy casing under the waterpump, you will need two new seals and sometimes a shaft as well. one seal keeps the water in the pump and one seal keeps the oil in the engine, the small hole is a space between the two

hello sounds like its running hot to be pushing out of overflow, you will need water pump if its coming out of weep hole, good luck

It means your water pump seal is seeping at this point. Eminent failureportended. Replace water pump. Seals on pumps usually fail because of bearing wear, so this is a precursor to pump shaft failure. Good luck