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Can a year-old water pump that doesn't leak or make noise just stop pumping ?

Temp. gauge goes up to hot just a few minutes after cold start. Radiator and thermostat have been replaced. There seems to be no coolant flow through radiator

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You could have air in the coolant system when engine is cold remove radiator cap and run without radiator cap this may take a long time air bound systems will cause a lot of problems and cause your symptoms would start there just let it idle and keep an eye on the temp gauge depending on heat range on your thermostat the gauge should come up to about 200 degrees or so then fall back once it falls back check anti freeze level in radiator make sure your using compatible anti-freeze with your application and at 50/50 mix of water and antifreeze any bubbles you see in radiator at cap means there is air in system ...hope this helps

Posted on Apr 14, 2015

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The impeller could break loose from the shaft. You would have to remove the pump to find out for sure.
Could be a blockage in one of the passages too.

Posted on Apr 13, 2015

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1 Answer

HEATING ISSUES


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Souds like it's way low on coolant. The heater will blow cold air when the cooling system is so low that there is no water (coolant) running through the heater core. Then the thermostat opens, it trys to be normal but the system is low so it gets too hot in just a few minutes. If its that low, there must be a leak somwhere.

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Check if the fan turns on a few minutes after a cold start. It may be a problem with the fuse or the relay. Check if you loose coolant, there may be a leak somewhere, the hose, bad fuel pump, radiator leaks or a bad radiator cap.

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I would do a sniff at the tail pipe to make sure you are not pumping coolant out the exhaust pipe.
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1 Answer

Temp gauge goes from cold to hot.


You can remove the rad cap and run the engine ( do not remove cap when hot!! ) You should be able to see the coolant circulating in the rad. You can also remove a heater hose and hold upwards and start engine, if coolant flows out the pump is circulating. If all looks good at that point I would start to suspect a cylinder head gasket leak and / or cracked cylinder head. Hope this helps .. Good Luck

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1 Answer

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