C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

engine whistle after rebuild

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Old Nov 20, 2003 | 09:48 AM
  #1  
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Default engine whistle after rebuild

got my car back after a complete rebuild and hotcam install from LG motors. That night (last night) I developed a whistle when I rev. Starts ~2k and gets higher as I rev higher. At first I thought a siren was coming in the distance, but it would go away at idle. I will have LG look at it today, but I was wondering if anyone else has heard such a thing!

thx
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Old Nov 20, 2003 | 10:27 AM
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Default Re: engine whistle after rebuild (tailgunner)

I thought I saw a black C4 sitting up at Lou's. I live about a mile from his shop. As for the whistle, I would suspect maybe a vacuum leak like the throttle body is not tight or something similar.

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Old Nov 20, 2003 | 10:28 AM
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Default Re: engine whistle after rebuild (tailgunner)

Could also be the alternator if it is getting louder with higher revs.
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Old Nov 20, 2003 | 10:40 AM
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Default Re: engine whistle after rebuild (Vette92)

I am betting on a vacuum leak...
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Old Nov 20, 2003 | 01:43 PM
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Default Re: engine whistle after rebuild (Vette92)

I took it back to Lou's this morning and the whistle was more of a whine. Turned out to be a bearing in the alternator pulley. They fixed it on the spot and I am good to go! :thumbs:

Vette92, there is another black C4 outside right now, but its not mine. I was earlier. I work at Cisco down the street off of G Bush Toll, so its a quick trip.

BTW they are putting in a small block 427 in a Z06! Would love to have THAT budget! :D




[Modified by tailgunner, 1:43 PM 11/20/2003]
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Old Nov 20, 2003 | 03:18 PM
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Default Re: engine whistle after rebuild (tailgunner)

:cheers:
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Old Nov 23, 2003 | 07:15 PM
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Default Re: engine whistle after rebuild (tailgunner)

I had the same thing this summer. It went away when I changed the alternator... :yesnod:
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Old Nov 23, 2003 | 09:04 PM
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Default Re: engine whistle after rebuild (brdd)

hmmm... and my alternator just died and burst into a billow of smoke. WTH, why don't i get a whine? :lol: :smash: :D
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