Question about Buick LeSabre

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Round machined hole in water pump housing leaking coolant

Water pump housing has a round hole on the upper side that appears as though it should be plugged with something, at any rate it is leaking coolant profusely. What needs to be done? This is a 1977 Buick LaSabre.

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The hole is there to let you know the antifreeze seal in the pump is leaking. You need a new (or rebuilt ) pump installed immediately. Please change the belt and any tensioners while you are at it...

Posted on Apr 14, 2009

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Posted on Jan 02, 2017

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Water is draining from a little round hole near the water pump looks like there should be a plug or nut going in there, can you please advise


That little hole is called a tel-tale hole, it let's you know when the seal has started to leak, and prevents leaking coolant from entering the bearing..

You will need to replace your coolant pump..

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take the car to a radiator specialist shop and have a coolant pressure test done to determine where the leak is
if it has plastic tanks for the radiator , they split with time and leak under pressure and a pressure test will reveal exactly where the leak is unlike a guess

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THIS IS A WEEP HOLE IF YOU ARE LEAKING COOLANT THERE REPLACE THE WATER PUMP.

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Good luck, let me know.
Regards,

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