Engine makes a whistling noise
Thread Starter
Instructor
Joined: Apr 2001
Posts: 107
Likes: 0
From: Tucson AZ
Engine makes a whistling noise
The engine on my 2001 coupe makes a whistling noise at about 2800 rpm when under load. I thought it was a squeak in the accelerator linkage at first, but it can be made constant by holding the RPM steady. Hard to duplicate standing still, and I don't have access to a dyno. I have seen threads about the intake systems on modified vehicles, but mine's stock. Any ideas? I can take it to the dealership, but I ran a garage for years and would rather fix it myself if it's feasible.
Team Owner
Joined: Mar 1999
Posts: 28,753
Likes: 9
From: San Jose/Bear Valley CA
CA Events Coordinator
Re: Engine makes a whistling noise (Just4Grins)
My engine started whistling just like yours once I installed the LS6 intake. :( That was not what I had expected from a HP Mod. :nonod: I bet it is your intake on your car. :yesnod:
Whats going to happen when I install the Coil Overs?? Should I expect to hear "Bud"-"Wies"-"er" from the F-ing Budweiser Frogs? :conehead
vetterdstr :cheers:
Whats going to happen when I install the Coil Overs?? Should I expect to hear "Bud"-"Wies"-"er" from the F-ing Budweiser Frogs? :conehead
vetterdstr :cheers:
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Drifting
Joined: Apr 2001
Posts: 1,773
Likes: 0
From: Norman Oklahoma
Re: Engine makes a whistling noise (Just4Grins)
Thanks for the help. For reference, the fitting is on the driver's side towards the front of the engine.
Jerry
Melting Slicks
Joined: Mar 2001
Posts: 2,668
Likes: 849
From: New Jersey
Re: Engine makes a whistling noise (Just4Grins)
The whistle is a known issue with the newly designed (for 2001) intake manifold. It is due to an unused (used for EGR in the F-body version) cavity molded into the intake manifold, where it bolts to the throttle body. At part throttle, a resonance (whistle) is created. Some people have fixed this "problem" by filling this cavity with epoxy.
Drifting
Joined: Jun 2000
Posts: 1,338
Likes: 0
From: Fontana CA
Re: Engine makes a whistling noise (ersatz928)
The whistle is a known issue with the newly designed (for 2001) intake manifold. It is due to an unused (used for EGR in the F-body version) cavity molded into the intake manifold, where it bolts to the throttle body. At part throttle, a resonance (whistle) is created. Some people have fixed this "problem" by filling this cavity with epoxy.
I believe that for 2002 GM addressed the problem. I would check with your dealer or Fitchner Chevrolet to find out for sure. If they have, you should be able to get your manifold switched to the 2002 version under warrantee.
[Modified by SoCal C5, 2:42 PM 1/2/2002]
Thread Starter
Instructor
Joined: Apr 2001
Posts: 107
Likes: 0
From: Tucson AZ
Re: Engine makes a whistling noise (SoCal C5)
Thanks for the help. I'll contact our local dealer and see what can be done - need to balance the whistling against what can happen once the dealer tears into it....
Thread Starter
Instructor
Joined: Apr 2001
Posts: 107
Likes: 0
From: Tucson AZ
Re: Engine makes a whistling noise (Rob 2K1)
I took the coupe to the dealer (O'Reilly Chevrolet in Tucson). The service manager heard the noise and said "yeah, the throttle plate is whstling a little bit. There are no ETB's out on this, so I can't do anything about it." The service manager, who has been a pretty good guy in the past, said that he would check with the regional service rep, but I think I'll end up taking this somewhere else. Before I do, is there any documentation from GM on this problem that I can refer to?
