well its 4 am where I live now but ive been drinking coffee all night so I tried for you- it makes that noise but not very loud, I think every car does it though. If its really loud then i would be concerned, but its normal. If you think you have a problem its probably from running the pump dry. Im thinking for sure when your spinning that the pump doesnt get any fluid into it though and thats why it stiffens up and or blows a fitting..
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