author=jcboy link=topic=40695.msg927223#msg927223 date=1414676153
Go with the cheapest route ALWAYS. (well as much as possible)
1) replace with original Radiator CAP --often neglected.
2) replace thermoswitch --original as what has been mentioned, since aftermarket thermoswitches are not calibrated with OEM specs (degrees Celsius when opening), let alone racing thermoswitches have a lower "open" temp.
3) replace thermostat --or just check it. rarely do thermostats break down. siguro 10-15 years is the average lifespan sa mga nasisiraan nito, pero of course 7-10 years pwede mo na siguro palitan.
4) check/replace rad fan --minsan kahit umiikot hindi na pala ganun kabilis/kalakas, kaya you need to have 2nd opinions kung kumusta ba pagikot ng rad fan mo.
5) replace radiator --minsan barado na pala sa ilalim kaya hindi umiikot tubig. yung kalawang kasi ng radiator sa ilalim nagaaccumulate. kaya minsan kahit malinaw pag sinilip sa butas yung water/bakal na fins nya, nagooverheat ka pa din. yun pala hindi nakakadaan yung coolant/water.
6) head gasket --ayan tinamad na ako, so pag the 5 steps do not seem to work, paconsult mo na sa trusted shops.
HTH.