Question about 2000 Nissan Maxima

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2000 Maxima Overheating - STILL

I am now on my 2nd new radiator in a week! The first replacement cracked when I overheated AGAIN. Replaced thermostat and hoses also. I have "burped" the system, and it runs cool at idle and low speed/ low rpms. As soon as there is a load or I get the rpms up for a any length of time the temp gauge moves right up. When I turn the heater on the air that comes out seems hotter than normal. Is it possible that this is a water pump issue? How can I determine this at home with basic tools?

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  • diemand Jan 20, 2009

    Over the past 4 months, every once in a while I would have a strong "over heating" smell, when I was stopped or ideling. It wasn't all the time. Last week my heater was blowing out cold air and my mechanic told me my water pump was bad. The pump has been replaced for a week now but twice in 4 days I have smelled that "over heating" smell. The temp gauge doesn't show the car hot and after a while, it goes away?????

    Help.....

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You can't determine if your pump is bad. You just have to take it out and look at it. Its internal insisde the timing cover right by the timing chain. Those pumps are pretty bulletproof, because they are internal, but you never know. I have replaced 1 so far in my 12+ years with Nissan and that was a 1998 Maxima qwith over 200 000 miles. Unless you have a coolant leak or somekind of funny noise coming from the timing chain area, you really can't tell, if the pump is bad. good luck.

Posted on Aug 21, 2008

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A way to see if the pump is pumping is to remove the thermostat, replace the holder without the thermostat. Reconnect the hose to the thermostat, remove the hose from radiator and direct the open end to the ground or over the side of the car if it will reach. Open the radiator cap and have a garden hose on hand. Fill the radiator with hose. Water will run out of open hose connection when radiator is full. Have somebody start the car and stand back. If the pump is good, water will come flying out of the open hose on the thermostat cover. If no flow, you probably have a broken impeller, broken shaft, impeller is not holding to shaft. The pump is supplied by the radiator, so keep filled with the hose if you keep running the engine. The water will come out cold or a little warm since it is only passing through the engine once. If the flow is weak, try squeezing on the hose and see how much force it has.

This is an outside, messy job and you will lose your antifreeze unless you drain it and save it before test.

Posted on Jan 16, 2009

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Have you replaced a temperature sensor or maybe check electronic connections behind cluster assembly, if the car has ben overheated badly and you have loss of coolant check for white smoke in mornings and would not hurt to check for combustion chamber gases on your radiator, you can buy kit at local part stores.

Posted on Aug 28, 2008

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