Question about 2003 Oldsmobile Silhouette

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My 2003 Oldsmobile Silhoutte Van overheats when going through town if has been running for a while If I can get a speed above 50 mph then it starts to cool down. What can be the problem In December, they told me that intake gaskets needed replaced. I was having to add antifreeze about every three days. all hoses have been inspected and a test of the manifold gaskets done no problems there. Local mechanic believes it could be the cooling fans but does not know when exactly they should kick in.

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They should kick in at 218 to 220 degrees,but then they should go off by them selves ,make sure there is no air in the cooling system,and maybe change the coolant sensor,and thermostat,if this problem persist,the radiator would most likely be the problem,if the cooling fans are coming on,it is important they cut off on there own also,this means the engine(radiator)are cooling down,if the cooling fans do not cut off,there is still another problem

Posted on May 10, 2010

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Posted on Jan 02, 2017

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