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Old 03-30-2014, 11:18 PM   #1
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Default water pump noise or other

buicklesabre00

before the water pump was replaced there were few occasions this situation would occur (6 month - 10,000 miles)

maybe about 10 times and would say 4/10 was within a month less to its replacement

situation: would start car, drive some way (10-300 miles) without any bad noise , then come to a stop then a whirring sound would appear on the passenger right side
and then continue whirring upon acceleration with a slight knock sometimes at certain shift points , above 30mph sound not audible .
if quickly accelerated the knock would not appear, just the whirring.

would turn car off , wait a couple minutes, start car and it would go away



got the water pump(acdelco oem) replaced and after one thousand miles the sound had re-appeared after one hour of good driving.
then took it for a half hour drive without any bad noise then once again come to a stop and the whirring sound reappeared, whirring but also at one point a sound kinda rubbing grinding, -
came home , parked car, engine on, dont hear it


coolan level in reservoir is same, a slight wetness near thermostat housing , no overheating , dunno if its droping at the weep
steering wheel moves freely, no screeching



have i just gotten bad bearings on this new water pump ?

could it be some thing else that occurs inconsistent and makes a whirring noise and a slight knock at different points in acceleration and not audible at around 30mph?
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Old 03-31-2014, 11:11 AM   #2
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pretty common 3800 issue is a/c compressor clutch noise, see if it goes on and off with the a/c or defrost
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Old 03-31-2014, 04:14 PM   #3
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I'm with Justin. Sounds like your A/C compressor is making some noise.
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Old 04-01-2014, 02:04 PM   #4
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You might also want to check every point that your serpentine belt goes on. like alternator, and the A/C compressor as mentioned, power steering and especially the idler pullies. look at the serpentine belt. kind of sounds like a bearing has locked up and the belt is being pulled across. then again maybe not.
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Old 04-02-2014, 02:29 AM   #5
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the ac pulley plate does not rotate

should the ac pulley'* bearing be replaced or the ac clutch ?
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Old 04-02-2014, 08:54 AM   #6
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it doesnt move when you turn on the a/c? make sure you are getting power to it, the pcm controls it and if a safety is bad then it wont be calling for the clutch to engage
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Old 04-02-2014, 06:18 PM   #7
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My '00 LeSabre is also somewhat noisy on startup idle (more along the lines of constant squeaky whirring, no knocking/grinding like the OP), and I'm wondering about bearings within all those various pulleys on the serpentine belt path. How can those noises be narrowed down easily?
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Old 04-02-2014, 07:11 PM   #8
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Quote:
Originally Posted by scottydl View Post
My '00 LeSabre is also somewhat noisy on startup idle (more along the lines of constant squeaky whirring, no knocking/grinding like the OP), and I'm wondering about bearings within all those various pulleys on the serpentine belt path. How can those noises be narrowed down easily?
Scotty, there is a video on youtube called Garage Essentials 2-Mechanics Stethoscopes, check it out, I tried to link it here with out success, sorry.

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Old 04-03-2014, 12:34 AM   #9
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Quote:
Originally Posted by jwfirebird View Post
it doesnt move when you turn on the a/c? make sure you are getting power to it, the pcm controls it and if a safety is bad then it wont be calling for the clutch to engage
no noise during this
ac off - plate does not rotate
ac on - plate does rotate

by safety you mean the relay ?
could just putting in a new relay stop this or is it definitely the clutch?

Last edited by beerbarrel; 04-03-2014 at 12:38 AM.
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Old 04-03-2014, 08:30 AM   #10
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i thought you meant it wasent turning on. sounds fine. what do you mean no noise during this?
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