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02-08-2008, 01:19 AM | #1 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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whistling sound... HELP
Took about a 150 mile trip the other day and got to a stoplight and started to hear a whistling/chirping sound. My first instinct was a vacuum line, but then i realized that it was increasing with rpm, so wouldnt a vacuum line whistle constantly?
Also got out to hear it better, popped the hood, and it is coming more from underneath than on top... any ideas fellas? need to get this bad boy fixed!!! |
02-08-2008, 01:56 AM | #2 |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: whistling sound... HELP
A loose belt maybe? Have you tried tightening the belts?
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Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
02-08-2008, 04:08 AM | #3 |
Registered User
Join Date: Dec 2007
Location: Central Coast, CA
Posts: 177
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Re: whistling sound... HELP
Something on one of the belts or pulleys?
When I did my engine swap we didn't tighten one of the bolts on the smog pump all the way, and within 10 seconds of startup it worked it's way out to butt up against the pulley. I got a nice whining noise while it buffed the top of the bolt for 20 minutes. I'd check your assembly from the fan back to make sure some piece of debris didn't get kicked up in there somehow.
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1974 GMC C-10; my new addiction 1998 4 Runner; daily driver |
02-08-2008, 05:02 AM | #4 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: whistling sound... HELP
not a belt... they're tight. sounds more like its coming from the rear of engine/front of tranny...
dont think its a throwout bearing cuz i know what that sounds like- i think its a stock 454 with sm465 tranny |
02-08-2008, 08:05 AM | #5 |
Surviving, one day at a time!
Join Date: Jan 2008
Location: Turlock,CA
Posts: 295
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Re: whistling sound... HELP
could be the pilot bushing they will tend to do that when they get old.
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02-08-2008, 08:54 AM | #6 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: whistling sound... HELP
wont the transmission have to be removed to change this?
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02-08-2008, 09:34 AM | #7 |
Surviving, one day at a time!
Join Date: Jan 2008
Location: Turlock,CA
Posts: 295
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Re: whistling sound... HELP
Yes, so depending on how many miles are on the tranny,& clutch, ect. you might want to look into a rebuild. First have it put on a rack or a pit (like at one of those 10min. oil change places) and try to isolate where it is coming from. Could be the pilot, throw out, Or input shaft bearings. Also chech if the tranny is low on gear oil.
Last edited by GMBowtie79; 02-08-2008 at 09:38 AM. |
02-08-2008, 02:09 PM | #8 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: whistling sound... HELP
wish i had a rack to put it on.... ill have to investigate further and get back with you guys
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