well based on experience , teka gano katagal mo tinakbo na overheat at pano ka naglagay ng tubig afterwards ? , kasi usually ha in my case with a 4d56 , mejo ilang beses na ngyayari sakin yan eh worse case eh i needed to change ung mga gaskets ko due to oil leaks and had to reshave my valve head kc nabingkong , hopefully nothing like that will happen to u . pero at least have it checked ng mabuti , una pacheck mo ung water pump , kc yan ang madalas bumigay pag naooverheat then check for oil leaks tapos check mo rin pala kung may bula na ung radiator mo pag nag sisirculate ung tubig , kc sign un na nabingkong na ung head mo. wag mo i take lightly ung bula na yun masakit sa ulo un pag tagal tagal. i hope this helps sir have a nice day.