Ridiculous Whining noise....
My SA began to make this obnoxious whining noise last night on my way home from work. Thought it might be a pulley bearing at first, but it's coming from the intake. Drove it around the block after I got home and seems to run fine. You can notice from the video that when I give it some gas the sound weakens but then returns to it's normal pitch. I thought it was a bad pulley bearing, but I'm not certain. Any help is appreciated.
http://www.youtube.com/watch?v=moaUs...ature=youtu.be |
compared to what the last one sounded like I would say your exhaust is plugged .:)
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Damn that's annoying...
Originally Posted by d_eagz13
(Post 11122043)
My SA began to make this obnoxious whining noise last night on my way home from work. Thought it might be a pulley bearing at first, but it's coming from the intake. Drove it around the block after I got home and seems to run fine. You can notice from the video that when I give it some gas the sound weakens but then returns to it's normal pitch. I thought it was a bad pulley bearing, but I'm not certain. Any help is appreciated.
http://www.youtube.com/watch?v=moaUs...ature=youtu.be To tell if it is the water pump or alternator, take off the belts and start it for a few seconds. Don't let it run for any amount of time without the water pump being driven. |
Based on how it dips when you rev it, I'd guess it's vacuum related. Something acting like a whistle as air is pulled past it. Vacuum dips when you rev.
Use a cardboard tube to listen thru, and you can probably localize it a bit better because the tube will be directional. you can also pull and cap vacuum lines one at a time to see if it will go away. |
Divin is right...def vac related.
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Originally Posted by gerald m
(Post 11122096)
compared to what the last one sounded like I would say your exhaust is plugged .:)
Divin thanks for the input, I am going to take a look at it this afternoon. I wasn't sure if it was a pulley bearing or due to the strange pitch and because I would expect a bad bearing to get louder as it cranks faster. As of now it's similar to deflating a balloon while pinching the ends so a vacuum issue seems more probable. |
Could be a vac hose, a gasket, or a torn diaphragm on one of the vacuum actuators (like the choke pull-off, shutter valve diaphragm, etc) if you still have them.
A bearing I'd expect the pitch to rise proportional to engine RPM. |
Originally Posted by DivinDriver
(Post 11123114)
Could be a vac hose, a gasket, or a torn diaphragm on one of the vacuum actuators (like the choke pull-off, shutter valve diaphragm, etc) if you still have them.
A bearing I'd expect the pitch to rise proportional to engine RPM. It was the gasket I put on under the block off plate... A slit ripped in it and it was flapping much like the balloon reference I brought up earlier. Thanks for the help! |
[painting another dead bug on the side of my monitor]
Glad to help. |
That noise was a vacuum leak?
Originally Posted by d_eagz13
(Post 11123240)
*Face palm*
It was the gasket I put on under the block off plate... A slit ripped in it and it was flapping much like the balloon reference I brought up earlier. Thanks for the help! |
mine did that and it drove me crazy! it was the thingy above the exhaust manifold was loose lol
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Too funny!
Originally Posted by snailslow
(Post 11124326)
mine did that and it drove me crazy! it was the thingy above the exhaust manifold was loose lol
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For a next time diagnosing a pulley/belt related problem take the belts off or use a small amount of brake clean on the pulleys/belt. If the noise goes way you got a general idea of where to start looking or not looking.
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My first thought after watching the video is that it might have something to do with that Frisbee that is lodged on top of your carb. :)
Does the car start running rough at idle when this started? If so, might be the shutter valve. |
Originally Posted by rx7lives
(Post 11124322)
That noise was a vacuum leak? Damn, how far did you have to drive with the noise?
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Originally Posted by Redpro
(Post 11125047)
For a next time diagnosing a pulley/belt related problem take the belts off or use a small amount of brake clean on the pulleys/belt. If the noise goes way you got a general idea of where to start looking or not looking.
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