Engine noise - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-24-2008, 10:21 PM   #1
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Default Engine noise

After getting my muffler done i relized after how loud my enigine bay is. Is there anyway to cut down some of the noise thats coming from under the hood?
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Old 03-24-2008, 11:04 PM   #2
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Some serpentine belts are louder than others. A Gatorback is probably quieter than something cheaper like a dayco or a drive-rite.

If you've gutted your air box it is probably louder. It'* designed to quiet the air sucking noise at the expense of air flow.
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Old 03-26-2008, 01:06 AM   #3
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I've noticed my engine bay is quite loud as well. And always wondered why it'* so loud. I used to work in an oil/tire/battery change shop and it seemed that most of the GM V6'* are loud like this. I was told by a person once who said that a lot of the noise comes from the upper intake since it'* plastic and allows a lot of noise to come through. It just seems that the GM 3.8, 3.1, 3.4 engines have a lot of rocker arm noise. they always seem to tap even with low mileage and in good condition. Sorry I don't have an answer but i hope to see an answer to this as well.
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Old 03-26-2008, 01:23 AM   #4
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I had same thing when I got my flowmaster muffler on. One of these days I'm just going to go ahead and lube up any pulley thats lube-able. Really, that'* the only thing that came to mind when I thought of how to fix all that noise.

One noise you can hear running cold is your IAC. It resembles the sound that a pulley makes before it'* about to seize lol, but it'* coming from the wrong side of the engine bay. Other than that, I just faintly hear the valvetrain and what I assume is the loud-arsed pulleys.
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Old 03-26-2008, 10:34 AM   #5
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My engine is really quiet.... All of my noise is injectors and intake... A tiny bit of Comp Cams lifter chatter on cold start... But warm idle is really quiet

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