Noise SC??!! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 06-08-2006, 03:30 PM   #11
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Quote:
Originally Posted by Bonneville94V688
Nope.
You are incorrect. All of our L67'* will run without a SC. But on the Series 1 (not the car in question) the water pump shares the same belt.
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Old 06-08-2006, 03:31 PM   #12
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Quote:
Originally Posted by hugger10
ok, i just took the belt off and there was only about half a millimeter of play in the supercharger. Started it (it actually started and ran fine) but it still made the noise. Stopped the SC from freewheeling with the belt and 2 wild things happened: 1 the engine kept running, 2: the noise kept running too. I can just swear it is coming from the fenderwell where I put in the cold air intake, it also got a little louder after I put the intake in. So I'm stumped but it goes away after a minute or two so I guess it'* not too bad.
As expected, your car idled fine. Which is why I told you to start it with no SC belt.

If the noise only happens in the first few seconds of a cold start, I bet the noise is coming from air passing through the IAC passage as the idle settles in. If it got louder from the intake, and the noise isn't changed when the SC isn't spinning, this is normal noise at startup. Think of it as a modern choke.
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Old 06-08-2006, 03:38 PM   #13
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Well Ils sleep easy then, much appreciation for the help.
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Old 06-08-2006, 10:02 PM   #14
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You have my thanks as well, that answered my question.
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Old 06-09-2006, 02:04 AM   #15
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no wait, i just read your post one more time and you said first few seconds. I'm talking minutes here. Does that change things?
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Old 06-09-2006, 08:42 AM   #16
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Does it go away during warmup if you tap the throttle for the RPM'* to drop?
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Old 06-09-2006, 08:44 AM   #17
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by Bonneville94V688
Nope.
You are incorrect. All of our L67'* will run without a SC. But on the Series 1 (not the car in question) the water pump shares the same belt.
Ha, yeah that'* what I meant.
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Old 06-09-2006, 08:48 AM   #18
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Regardless, the car WILL run just fine without the pulley. The S2 indefinitely, the S1 for less than 5 minutes before overheating. It'* important that people understand they CAN do this. It'* a valuable troubleshooting step as you can see.
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Old 06-09-2006, 10:06 AM   #19
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As WillWren says..an invaluable tool. Only words of caution are that if you are a series 1 owner you start with a cold car and keep in mind that your water pump is inoperable w/o the belt on.

S2 can actually drive w/o a belt if necessary.
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Old 06-09-2006, 01:21 PM   #20
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no I've revved it and everything it just keeps on making the noise untill it'* warmed up.
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