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01-19-2022, 01:40 PM
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#1 |
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Registered User
Join Date: Jan 2009
Location: South Carolina
Posts: 261
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1969 C 10 fan belt noise
Have a bone stock 307 and a newish belt . Been making noise /slipping at high RPM for a while . Belt's clean but pulley groove has black residue in it . From slipping I guess ? Gonna wire brush the pulley clean and see what happens . Anything else I should do ? Should add that the belt's tight . Thanks !
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01-19-2022, 03:24 PM
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#2 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,108
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Re: 1969 C 10 fan belt noise
Make sure whatever devices (water pump, alternator, etc.) turn freely when the belt is off.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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01-19-2022, 05:26 PM
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#3 |
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Registered User
Join Date: Jan 2009
Location: South Carolina
Posts: 261
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Re: 1969 C 10 fan belt noise
Thanks Steeveedee , didn't think about that !
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01-19-2022, 06:20 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,516
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Re: 1969 C 10 fan belt noise
Did you get the right belt when you got a new one. The length isn’t the only thing to get correct. The shape is very important so it sits in your pullies right.
Some info here. https://www.powertransmission.com/ar...d_Replacement/ |
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01-19-2022, 07:57 PM
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#5 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,499
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Re: 1969 C 10 fan belt noise
Make sure the pulleys are properly aligned.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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01-19-2022, 08:03 PM
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#6 |
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Registered User
Join Date: Jun 2016
Location: Bremerton, WA
Posts: 171
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Re: 1969 C 10 fan belt noise
I had horrible squealing noise at 3,000 rpms that didn't change whatever belt I used. It turned out the harmonic balancer was slipping on the broken isolation rubber mounts. A new "old" balancer fixed it.
__________________
1969 Custom Camper C20; Factree Air, 350/TH400/Dana 70U with C30 wheel cylinders, Disk brakes, H4 conversion, headlight relay mod, 3G 135 amp alternator. 7500 GVW |
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01-19-2022, 08:04 PM
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#7 |
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Registered User
Join Date: May 2018
Location: Prattville, AL
Posts: 590
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Re: 1969 C 10 fan belt noise
X2 on belt alignment. Changed mine over to a serpentine system and had all kinds of belt noise when I started it. Checked the belt alignment and it was off by one groove on the ac compressor. Fixed that no noise.
__________________
-------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it) |
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01-20-2022, 09:38 AM
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#8 |
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Registered User
Join Date: Jan 2009
Location: South Carolina
Posts: 261
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Re: 1969 C 10 fan belt noise
Thanks for all the info guys . I'll get out today and see what I find . Thanks again !
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