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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Weird Noise

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Old 07-28-2007, 02:12 AM
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Default Weird Noise
I noticed lately (past week or so) my lt1 makes a weird noise usually most noticeable during start up. It's a whine almost sounds like a loud fuel pump under my hood. I know lt1s are noisy but this is worse than it normally is. It doesnt change pitch or anything when the rpms change its just a high whiney noise. I looked under the hood and I just cant specify where it is coming from. any ideas?
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Old 07-28-2007, 08:10 AM
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How old is your serpentine belt? I might try changing it.
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Old 07-28-2007, 09:49 AM
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If it were belt wouldn't it change pitch as it turned faster? I had a truck once that needed an idler pulley (bearing bad) and when you sped it up, the pitch changed noticeably.
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Old 07-28-2007, 10:15 AM
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yeah I was thinking it isn't belt related since the pitch is constant
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Old 07-28-2007, 02:10 PM
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maybe the air pump for the first few minutes?
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Old 07-28-2007, 02:24 PM
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mine ws.6 did that too. if you turn the key on without turning the car over then turn it back off does it make another noise?
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Old 07-28-2007, 04:44 PM
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Originally Posted by sdm1234
maybe the air pump for the first few minutes?
Nope the AIR pump was removed
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Old 07-28-2007, 04:45 PM
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Originally Posted by Red96TA
mine ws.6 did that too. if you turn the key on without turning the car over then turn it back off does it make another noise?

nope only when the car is running. I'm gonna take the belt off and see if it stops making the sound
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