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My 2001 Pontiac Montana has loud noise while it idles. I was told it was the transmission mount. It seems to sound rattly while it shifts gears. Also, if I just ride around the blocks it seems to get hot. If I get on interstate it cools back down to normal. It has not overheated. Is this my thermostat or water pump?

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  • Cars & Trucks Master
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I doubt the cooling problem is either. The most common reason for running hot at slow speeds is not enough air coming thru the radiator. Either the cooling fan is not coming on, or there is a blockage in the radiator.
And the loud noise could be a mount. You may want to get a second opinion before having the repair done.

Posted on Jul 17, 2013

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Posted on Jan 02, 2017

  • 1619 Answers

SOURCE: Pontiac Montana overheating

How do you know the thermostat is ok? If in doubt replace it. Water pumps are a even bigger what if. Did he do a radiator flush? Cooling system flush of the engine? Cooling fans come on at what temp and go off when? Replace the engine temperature sensor? 6 years old is bound to have sensors and such go bad.

Posted on Jun 16, 2009

keemo68
  • 1263 Answers

SOURCE: Overheating

the upper hose is suppose to be hot this lets you know that the thermostat is working like it should. if it were cold that would indicate that the thermostat was bad. i would say that it's the water pump because your not getting the circulation if it were a blockage your upper hose would still be cool as well.. hope this helps please rate...thanks

Posted on Sep 05, 2008

crayzeetrayn
  • 837 Answers

SOURCE: i have a 1999 cadillac deville thats running hot

Have you replaced the drive belt(s) and/or checked the tightness of same?

Posted on Feb 07, 2009

  • 1114 Answers

SOURCE: my saturn 2001 SL2 seems

they have a external transmission filter I changed one of these before if you do not change the filter and fluid on manfactures maint sugestions you might be in for further repair?

Posted on Dec 22, 2008

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