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SteveCanyon
05-22-2015, 10:25 PM
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?
Franke
05-22-2015, 11:00 PM
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.
QB93Z
05-23-2015, 12:18 PM
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
SteveCanyon
05-23-2015, 01:57 PM
No change with the clutch. I will try to get some video and will try pulling the radiator cap too.
BigJohn
05-23-2015, 03:29 PM
That's funny, mine has always made that sound!
secondchance
05-23-2015, 03:50 PM
Try starting with AC turned off. If that stops the noise its refrigerant noise.
SteveCanyon
05-23-2015, 04:13 PM
Try starting with AC turned off. If that stops the noise its refrigerant noise.

Does it without the AC on.
SteveCanyon
05-23-2015, 04:14 PM
That's funny, mine has always made that sound!

It might be normal, just curious what is causing it.
Arctic91
05-23-2015, 06:35 PM
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
Jagdpanzer
05-23-2015, 06:54 PM
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
SteveCanyon
05-23-2015, 08:49 PM
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

I also occasionally hear a sound that sounds like cards being shuffled (while driving) that lasts about a second, is that the AIR pump?
Arctic91
05-23-2015, 08:57 PM
I don't think that there is any reason that the AIR pump would come on after initial start-up. Sounds like that is a completely separate noise/issue, though?

Scott
BOB HDZ
05-26-2015, 11:55 AM
Mine made that noise it was a plenum bolt that I forgot to tighten!