Update: I think its okay now, the mechanic said it was a bad thermostat, he even showed me, it was all rusty. For now he said no need to use the thermostat, is tht a good idea? He explained tht thermostat is to be used in cold country (I live in south east asia, near to the equator, so its tropical climate(mostly hot)) I did some research and mostly the people would not recommend it. Any opinion? A thermostat here cost about $100, that is roughly around $80usd, that includes the housing, they dont sell the thermostat separately.