I've had overheating problems last month. Now the initial observation was, its a cyclinder head issue since nauubos yung fluid sa radiator at reserve at bumubulwak nung tinest yung flow ng coolant/water. PinaLavramon ko yung engine tapos nung tinignan yung radiator sinuggest na palitan ko yung radiator. So upgraded na sa 2-row aluminum radiator at di na nagoverheat pero nung pinainit to test kung nag circulate bumulwak pa din. My question is, should I be concerned that its a cyclinder head issue since di nag overheat at stable na yung coolant supply, na di nag drain or apaw at wala naman yung one of the signs na milky white substance sa oil cap?