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Why is my grundfos mq45 leaking from the hole at the bottom where you can see the shaft??

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  • Cars & Trucks Master
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Likely the pump seal is worn and should be replaced.

Posted on Dec 31, 2016

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If the water pump is leaking, where will you see the leak? Bottom of P.S. bracket at back of timing cover or out timing cover @ crankshaft, front of timing cover?


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Antifreeze is leaking bad in 2008 dodge charger


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Sounds to me like the shaft seal has failed on your water pump and you need to replace the pump, theres usually a tiny hole either at the bottom of the water pump or at the top of the pump its called the weep hole, when coolant comes out of this hole it means the internal shaft seals of the pump have failed and it requires replacement of the pump, now if the coolant is coming out of where the pump bolts onto the engine block you propbably only need the waterpump to block gasket to fix the leak, check and see exactly where the coolant is coming out from so you can be sure exactly what you need to replace....

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If it is the water pump it will have a rad hose attached to it. There is supposed to be a small hole in the bottom of the water pump. When it starts leaking, it's time to replace the pump. You can do it yourself. A few wrenches and a couple hours is all you need. If you are unsure pick up a Haynes manual for your car when you get the new pump.

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without any more description than this can only guess as to where. The hose end can leak because it's not on properly,< loose, crooked , torn etc. Hose is attached to water pump and it can leak from seal around mounting point or the hole on bottom side of pulley shaft. If leak is from water pump then you should replace it,< to repair seal it has to be removed and putting a new one on is best to complete repair without possibly having it break you down soon after repairing seal>, if it is leaking from hole on pulley shaft it will have to be replaced.

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1 Answer

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You need to look closely at the hose connections, freeze plugs, and the water pump. Water pumps are designed so that when the shaft bearing wears out, they leak from a small hole under the pulley shaft. Sometimes they will only leak while the engine is running. Freeze plugs can rust through causing a leak usually from the side of the engine. Hoses can leak from anywhere. You'll probably have to get under the engine to narrow down the possibilities. You may also want to rent a tool to pressurize the cooling system. That might help you to see where the leak is coming from. If you've never changed a water pump or a freeze plug before, you might be better off taking it to a professional. If it's just a hose, you could probably do that yourself. I hope this was helpful. Thanks.

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I have a coolant leak coming from the front of the engine. looks like it is leaking around the cam shaft pulley. The vehicle is a 2001 Nissan Frontier v6


Sounds like either the water pump or the thermostat housing. The water pump has a small hole in the bottom where the shaft comes through, when the water pump gets worn it will leak here so you know to replace the pump. The thermostat housing will be at the motor end of the upper radiator hose where it attaches to the motor. Hope this helps.

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