I.m guessing you have cylinder head gasket leaking.
The pump is deep in behind the timing cover . You have to remove rad , crank pulley and a host of parts, belt , tensioner, its the most poorly built engine i've seen .
My opinion ...................its a piece of chit.
some diff then the little 3.3 that were in the Dynasty's
Good Luck , bet you will have to tear it down again in no time.