Changing the coolant breather valve

[shlim8]

I've got a 04 radiator cap. Just bought about 3 weeks ago but am still getting condensation and losing coolant. It does look like the water is seeping pass the3 of the bolts.

Is the bleeder valve a simple unbolt and replace part ? How tight should the bolts be ? Depending on the parts availability I might have to change just the 2 O-rings. I presume that should do it. The bleeder valve is in the closed position when I looked at it with the coolant cold.