Question about 2000 Pontiac Montana

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Running hot replaced water pump,thermostat,hoses,coolant switch,temp switch

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Have you had your radiator flushed? If not, try that.

Posted on Apr 23, 2009

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I have had the same problem in the past. Replaced the head gasket and all is good. Try that.

Posted on May 03, 2009

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Bad head gasket. look in oil cap to see if it's white or "milky"looking.

Posted on Apr 25, 2009

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Why would 2002 ford ranger 3.0L temp guage stay on extreme cold after water pump replacement?


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Not sure I follow your wording on the different temps. If the system is full of coolant and working correctly, the thermostat should open at 195 degrees which would be several miles down the road. Once the thermostat opens both radiator hoses should be warm. If the water pump is not working the engine will get hot very quickly.
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We have replace the water pump, thermostat, sensor,replace cap for radiator coolant,and replace the radiator.The car keeps running hot.


Oil level and correct grade of oil? Oil filter? Rent a temp gun from an auto store and check for actual temp. If it is running hot you still have a leak, like on a hose or the reservoir or maybe you didnt get all the air bubbles out. Also thermostats can come bad, replace again.

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The thermostat has either failed shut or you failed to remove a transit blanking plug in the radiator before you fitted it

Remove the thermostat cover and take it out

You can run the car without a thermostat as their prime reason for being there is to warm the engine up quickly when the car first starts

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Good Day,

Sounds like the thermostat is working properly, the only other cause for the valve/lifter noise could be the oil pump is not pumping enough oil up to the top of the motor. I suggest doing an oil change(if you haven'y aleready), be sure to flush several quarts through, after sitting for 5 years I'm sure the old oil is pretty sludgy, this well help rule out this possibilty. As far as the water pump goes, It either works or doesn't typically when they are on there way out the will leak from the gaskets. A bad head gasket would cause white smoke form the exhaust as coolant get's into the oil and is burned off, so I don;t hink this is the problem.

Here's a start for you, hope this helps and good luck

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