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Question:

Is this noise from my water pump?

I've been hearing a noise from my truck that sounds like a fan blade is rubbing against something metal but I could never figure out what it was and my truck seemed to be running fine. I recently replaced my radiator and now my truck is overheating. Was that noise my water pump going bad and now it's shot?

Answer:

wiggle the fan blades and if they move any it is a bad water pump, they will also leak a little bit under the main shaft of the water pump housing, there is a hole on the bottom and top just for this reason, the metal squealing is the impeller in the water pump, it wont last long now I agree....assuming you did put enough coolant back in it after changing the radiator.
wiggle the fan blades and if they move any it is a bad water pump, they will also leak a little bit under the main shaft of the water pump housing, there is a hole on the bottom and top just for this reason, the metal squealing is the impeller in the water pump, it wont last long now
could very well be.Also could be fan clutch.

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