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05-22-2015
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#1 |
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Join Date: Apr 2015
Location: Northwest AR
Posts: 95
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Whistle on startup
I am getting a loud whistle when I start my car for the first start of the day. Almost sounds like a supercharger whistle if that makes sense. Goes away after about a minute. The only thing I have changed is the coolant, wondering if there is some air in the system that is cycling out? Any other ideas?
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05-22-2015
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#2 |
 Join Date: May 2013
Location: Beaver, PA
Posts: 516
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Re: Whistle on startup
I wonder if it could be your A.I.R. pump running. It runs to help bring the cats up to temp etc. then shuts off.
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05-23-2015
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#3 |
 
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,687
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Re: Whistle on startup
Can you tell where the sound comes from? Left or right, front or back? The AIR system is a likely candidate, but it runs every time you start the engine. You mentioned the noise happens on the first start of the day.
If you think it is coolant related, start the car with the coolant cap off, but don't run it too long that way. Does it make a difference if the clutch is in or out? Jim
__________________
If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member |
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05-23-2015
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#4 |
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Join Date: Apr 2015
Location: Northwest AR
Posts: 95
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Re: Whistle on startup
No change with the clutch. I will try to get some video and will try pulling the radiator cap too.
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05-23-2015
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#5 |
 
Join Date: Feb 2012
Location: Ledyard,CT
Posts: 7,970
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Re: Whistle on startup
That's funny, mine has always made that sound!
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05-23-2015
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#6 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,700
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Re: Whistle on startup
Try starting with AC turned off. If that stops the noise its refrigerant noise.
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05-23-2015
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#7 | |
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Join Date: Apr 2015
Location: Northwest AR
Posts: 95
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Re: Whistle on startup
Quote:
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05-23-2015
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#8 | |
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Join Date: Apr 2015
Location: Northwest AR
Posts: 95
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Re: Whistle on startup
Quote:
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05-23-2015
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#9 |
Join Date: Nov 2007
Location: Sykesville, MD
Posts: 377
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Re: Whistle on startup
AIR system most likely... same with my '91. You can probably feel the pump vibrating when it's operating and change when it turns off.
Scott
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WAZOO Member '95 Callaway SNAT 450 Aerobody Coupe - Black/Black '92 Callaway SNAT 400 Convertible - Polo Green/Beige '91 ZR-1 #1231 - Arctic White/Saddle (SOLD) '90 ZR-1 #2547 - Turquoise Metallic/Black '89 Callaway Twin Turbo Aerobody Coupe #027 - Black/Black '85 Corvette 454 Coupe - White/Red |
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05-23-2015
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#10 |
Join Date: Apr 2007
Location: Northern VA
Posts: 2,644
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Re: Whistle on startup
To bad Bogie isn't still with us. A lot of us remember how well he handled incounters involving whistles.
https://www.youtube.com/watch?v=MheNUWyROv8
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake Last edited by Jagdpanzer; 05-23-2015 at 06:56 PM. |
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Linear Mode
