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Message: <blockquote data-quote="lwloh" data-source="post: 549020" data-attributes="member: 18923"><p>i had my coolant changed 3 weeks ago. ever since then, i notice the electric fan turns on to max speed quite often. But the water temp maintained at half mark. ie. middle. Until i went up to Genting last week. On a few occasions when the car is stationary, the water temp needle slowly goes up to the white mark on the right and comes back down again as fast as it went up. at this point the fans are at max speed trying to cool the engine. I suspected air lock in the system, bleed the radiator myself this morning for 15 mins ! So far, i don't hear the fan being noisy now. Check the coolant temp while driving at night, around 85-95C.  Idling at 87C. Outside temp shown 27.5C on the OBC. By the way, any one knwos what is the normal operating temp of radiator coolant ?</p></blockquote><p></p>