aweful noise upfront '88
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
aweful noise upfront '88 - solved!!!!!
I thought it was the AIR pump - so I removed the vanes today. I re-installed it and the noise is still there. Can a water pump make a noise like that? Maybe the belt tensioner?
Ended up being the pulley on the water pump. I took off the frisbee about 6 mo. ago and I didn't use washers between the nuts and the pulley. apparently the nuts bottom out on the stud before the pulley is tight.
[Modified by brookman, 9:11 PM 10/19/2003]
Ended up being the pulley on the water pump. I took off the frisbee about 6 mo. ago and I didn't use washers between the nuts and the pulley. apparently the nuts bottom out on the stud before the pulley is tight.
[Modified by brookman, 9:11 PM 10/19/2003]
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Re: aweful noise upfront '88 (brookman)
Please describe the noise, frequency and conditions when it happens
It could be the belt tensioner, alt bearings, water pump or just a plain old worn belt.
Somrtimes you can hold a very long pipe or crew driver to each rotating part and the other end to your ear and hear which is the offending part.
Removing the vanes from the air pump won't do much if it was the bearings
It could be the belt tensioner, alt bearings, water pump or just a plain old worn belt.
Somrtimes you can hold a very long pipe or crew driver to each rotating part and the other end to your ear and hear which is the offending part.
Removing the vanes from the air pump won't do much if it was the bearings
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
Re: aweful noise upfront '88 (jackdaroofer)
http://www.brookins.us/v001.wav
Here is the noise. I tried the 'listening stick' and it was no help.
I spun the alt. by hand when I had the belt off and it made no noise.
:confused: :mad
Here is the noise. I tried the 'listening stick' and it was no help.
I spun the alt. by hand when I had the belt off and it made no noise.
:confused: :mad
Racer
Joined: Oct 2002
Posts: 293
Likes: 0
From: Newnan Ga
Re: aweful noise upfront '88 (brookman)
Try the hose in the ear trick. You can use it like a stethescope to pin point the noise. The sound will echo up the tube while filtering out the surrounding noises. I use this all the time. I usually use the hose that I use to siphon gas. :smash:
Drifting
Joined: Oct 1999
Posts: 1,722
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From: Gloucester Va
Re: aweful noise upfront '88 (87NassauBlue)
thats a bearing. take the belt off and start the car. If the noise is no longer there then you know for sure it's a bearing. O make sure the car is cool when you start it and don't let it run for more than a few min. After all the water pump and alt will not be running. Will not hurt it just that the ign. will be running all off the bat.
[Modified by 88_vette, 1:00 PM 10/19/2003]
[Modified by 88_vette, 1:00 PM 10/19/2003]
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Burning Brakes
Joined: Dec 2002
Posts: 1,199
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From: Cairns Australia
Re: aweful noise upfront '88 (88_vette)
My rear bearing on the AIR pump was noisy - I thought it was the altenator until I used the hose to listen to each part - give it a try, it works really well.
S'nut
S'nut
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Re: aweful noise upfront '88 (severe-1)
Holly poopie! That is a god awful noise! :eek:
As suggested, remove the belt and run the engine for a few min. If the noise is gone, it's one of the accessories. Take each one and spin it, push it, pull it, etc. I had a similar noise (not as bad, though) a few weeks ago after a dyno run. The water pump had a slight grinding noise when I spun it but it deflected about 1/4 inch when I applied pressure to it. It never leaked a drop but turned out to be the problem. If the noise is still there you have other issues and not good ones.
Good luck.
[Modified by Steel Blue 91, 3:24 PM 10/19/2003]
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
Re: aweful noise upfront '88 (2vettes2go)
Thanks for all the input.
Ended up being the pulley on the water pump. I took off the frisbee about 6 mo. ago and I didn't use washers between the nuts and the pulley. apparently the nuts bottom out on the stud before the pulley is tight.
Ended up being the pulley on the water pump. I took off the frisbee about 6 mo. ago and I didn't use washers between the nuts and the pulley. apparently the nuts bottom out on the stud before the pulley is tight.