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How do I tell if my water pump is bad on a 2000 chevy blazer


frist check it for leakage at

frist check it for leakage at the pulley shaft, if no leaks found, remove the belt and check if it has any play when rocking fan blade/ pulley side to side.
why do you think it's a water pump problem?

Do as mws919 has stated, but

Do as mws919 has stated, but when checking for leaks use a "Pressure Tester".

Right on.. Thank you both..

Right on.. Thank you both..

let us know what you find.

let us know what you find.

to check for leaks on this

to check for leaks on this one; remove the water pump pulley and look at the machined hole under the pulley shaft (called the "weep hole") If it shows signs that the pump has been leaking---replace pump.
(signs include rust streaks left by leaking water and/or build-up of scale deposits at the hole)


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