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Message: <blockquote data-quote="greddyevo" data-source="post: 681863" data-attributes="member: 27753">Hello guys, looks like i had another over heating problem. While it was idling, the needle when up hot. i notice the top hose was hard. suspected the thermostat was jammed. i bleed the cooling system, and it was ok. took a town drive and monitored ard 95-96deg, Should be ok with that. i let the car runnig on idle, saw the temp reaching 98deg, pop the hood and saw aux.fan running fast.but the clutch fan was slow and even with a hard rev,it still maintain at same speed. looks like my Clutch fan kaput. Eng Soon quoted S$85 (Sachs). Not sure if i need to change the Thermostat housing,coz got it new recently.but why the top hose was hard???.:motz:any of Bros find vibration during cold start? then goes off once its warm. sometimes the check engine pops out. care to share?</blockquote>