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VT commodore temp rises then lowers ???

JakeysVT

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when driving the temp rise quite high the other day then it lowered agen but while idling it went right back up agen ? i have tested the thermostat, and drained the cooling system and put fresh water and coolant in it i have also bled the system too so there is no air in it

any help will be much appreciated :)
 

FC50

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Dayvo

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If you don't bleed the cooling system you can get a faulty reading on the temp gauge . It will read hot but the temp is normal . Run the motor for 5 to 10 minutes to pressurise the system then undo the bleed screw ontop of the thermostat housing until the air stops coming out and you have a constant stream of coolant . You will have to take the engine cover off to do it .
 
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