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07-30-2011, 01:00 PM
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#1 |
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Registered User
Join Date: Nov 2008
Location: edmonton, alberta
Posts: 293
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whirring noise from under hood
Hey all,
Got a whistling/ whirring noise from the front somewhere. only happens in gear and with the throttle on (under load). It speeds up with rpm. Can't seem to find it. Have no vaccuum leaks at hoses or brake booster, no belts squealing. disconnected mechanical speedo thinking that was it, it wasn't. its got a brand new TCI trans and stall. Could my alternator or power steering be making the noise or do I have a carb/ intake leak that could make that kind of whir/ whistle? Thanks in advance.
__________________
 76 Silverado, 2wd, long box, 350/th350, 3.42 posi, edelbrock performer 64cc heads, edelbrock 1405, 2101 intake, Hedman Headers, Comp Cam XE262 http://beerbreadbike.wordpress.com/ |
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07-30-2011, 02:50 PM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: whirring noise from under hood
!st place I would look is,
P/S pump Alternater A/C compresser Water pump T/converter tranny pump Anything that rotates same speed as motor. Take all belts off and start it "breifly" to see if it stops.
__________________
John 82 Chevy Silverado 350ci/TH350 
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07-30-2011, 04:48 PM
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#3 | |
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Registered User
Join Date: Jan 2011
Location: Tulsa,Okla
Posts: 590
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Re: whirring noise from under hood
Quote:
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07-30-2011, 04:52 PM
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#4 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: whirring noise from under hood
my friends truck was turbine powered too. we hacked the fan for a electric and no more turbine noise lol
__________________
377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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07-31-2011, 08:43 AM
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#5 | |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: whirring noise from under hood
Quote:
__________________
John 82 Chevy Silverado 350ci/TH350
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07-31-2011, 09:39 AM
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#6 |
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Registered User
Join Date: May 2010
Location: laurel hill Fl
Posts: 645
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Re: whirring noise from under hood
Mine seems to do the same thing it sounds like a hum when in gear and you hit a constant throttle.
__________________
1985 C10 Custom Deluxe LWB 305/700r4 [ Goldfinger ] 1999 k3500 crew cab dually 6.5tdi/4l80e |
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07-31-2011, 06:17 PM
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#7 |
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Registered User
Join Date: Sep 2009
Location: ottawa,canada
Posts: 4,550
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Re: whirring noise from under hood
prob clutch fan.
__________________
my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682 |
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08-01-2011, 09:21 AM
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#8 |
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Registered User
Join Date: Nov 2008
Location: edmonton, alberta
Posts: 293
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Re: whirring noise from under hood
Thanks for the suggestions,
after a bit more searching its got to be alt or pwr steering pump as I have an electric fan and a good spray around the carb and intake with carb cleaner did not change the idle. That said if removing belts doesn't stop noise, I'll check the waterpump. Seems highly unlikely the new TCI trans could be hooped.
__________________
76 Silverado, 2wd, long box, 350/th350, 3.42 posi, edelbrock performer 64cc heads, edelbrock 1405, 2101 intake, Hedman Headers, Comp Cam XE262 http://beerbreadbike.wordpress.com/ |
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