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do this sound like a spun bearing?

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Old Sep 29, 2003 | 02:21 PM
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Default do this sound like a spun bearing?

engine sound

i took the valve covers off and everything was tight and seemed to be ok so i guess its not in the top end

after i drive it for a little bit it goes away though, i dont understand that.
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Old Sep 29, 2003 | 05:02 PM
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Default Re: do this sound like a spun bearing?

at fisrt start up it kinda sounds like an exhaust leak. but when you get under the hood you can tell it isnt...
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Old Sep 29, 2003 | 08:09 PM
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Default Re: do this sound like a spun bearing?

What's your oil pressure like? If you spin a bearing I think your pressure will decrease. Also change the oil and inspect the filter. With a sound like that I would not run it for anything but testing.
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Old Sep 29, 2003 | 08:41 PM
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Default Re: do this sound like a spun bearing?

If your feelin' brave , you can pull plug wires one at a time & see if it changes the noise.
Even on LS1's you can disable injectors one at a time, it will have them same effect.
For the wire test ;
I usually take a pair of bent needle nose pliers, & hook a jumper wire to them & ground.
With gloves on pull one at a time while idling, see if noise changes.
Then you'll know for sure it's bottom end.
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Old Sep 29, 2003 | 09:58 PM
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Default Re: do this sound like a spun bearing?

oil pressure is good and it only does it when i rev the engine.
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Old Sep 30, 2003 | 12:49 PM
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Default Re: do this sound like a spun bearing?

there is no metal in my oil either, not on the dipstick anyway.

will there always be metal in the oil with a bearing problem?
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Old Sep 30, 2003 | 09:48 PM
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Default Re: do this sound like a spun bearing?

With a bearing problem the oil will take a "metallic" look to it.
In other words looking closely at the oil & depending upon the severity of the problem the oil will have small metal particles in it.
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