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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 84scottsdale454 on July 05, 2011, 08:16:33 pm

Title: both belts whine, old??
Post by: 84scottsdale454 on July 05, 2011, 08:16:33 pm

I have a 454 c10 and I keep adjusting the belts and they will not quit whining and squeeling! Could it be because they are old?

Title: Re: both belts whine, old??
Post by: Irish_Alley on July 05, 2011, 08:20:41 pm

worn glazed cracks can cause a whine. what i do is buy some belt dressing and spray it on one belt at a time till you find where the noise is coming from then replace that belt but if both belts look the same replace them or keep spares with ya

Title: Re: both belts whine, old??
Post by: zieg85 on July 05, 2011, 08:22:18 pm

Squirt a little WD-40 on the belts, if they quiet up instantly replace the belts...

Title: Re: both belts whine, old??
Post by: ehjorten on July 06, 2011, 02:03:59 pm

If the belts have slipped enough it is also possible that the shives are all burnished and a new belt might slip and squeal too!  At that time it is time to replace the belts and shives.

Title: Re: both belts whine, old??
Post by: beastie_3 on July 06, 2011, 07:19:47 pm

what is a shive?

Title: Re: both belts whine, old??
Post by: Irish_Alley on July 06, 2011, 09:14:41 pm

a shank??? ;D

Title: Re: both belts whine, old??
Post by: ehjorten on July 07, 2011, 02:23:46 pm

sorry...it is spelled Sheave, but pronounced Shiv.  That is what your V-belts turn around.

Title: Re: both belts whine, old??
Post by: Irish_Alley on July 07, 2011, 06:21:51 pm

Pulleys?

Title: Re: both belts whine, old??
Post by: beastie_3 on July 07, 2011, 08:23:39 pm

ya pulleys...?

Title: Re: both belts whine, old??
Post by: 84scottsdale454 on July 24, 2011, 08:45:30 am

They quit squeaking with new belts but I see that pulley is off rotation or warped? What's a shiv? It need a harmonic balancer because it seems to cause a lil vibration driving down the road!

Title: Re: both belts whine, old??
Post by: Irish_Alley on July 24, 2011, 08:49:33 am

Past tense use of a prison shank

Title: Re: both belts whine, old??
Post by: 84scottsdale454 on July 24, 2011, 12:32:24 pm

What's a shank gotta do with that pulley that seems warped? This an inside joke lmao?

Title: Re: both belts whine, old??
Post by: jaredts on July 25, 2011, 08:31:32 am

A sheave is the pulley.  If you're working on industrial equipment and call it a pulley you'll get laughed at.  For some reason on motors it usually gets called a pulley, but I'm not sure technically speaking if one is incorrect.

Title: Re: both belts whine, old??
Post by: Stewart G Griffin on July 25, 2011, 09:15:07 am

Another thing you could try is to take some steel wool and run it in the pulley/sheave grooves.  Not too scratchy as this will eat the belt.  Sand paper may also work.


Another thing i've found is that soap works temporarily.  But you have to do this quite often.

Title: Re: both belts whine, old??
Post by: ehjorten on July 25, 2011, 09:30:04 am

Anyways...worked on boats and industrial equipment since I was a kid and both my dad and my uncle called the wheel of a v-belt system a sheave.  Basically a sheave is a wheel with a groove in it for rope, cable or a belt to run in.  Technically a pulley is a flat wheel for a belt to run on (like the automatic tensioner wheel on your modern multi-rib V-belt drive), or is the system of sheaves and rope, cable or belt like a block and tackle or a come-a-long.

The point I was trying to make is that if your belts have been slipping for a long time, you replace the belts and still have problems with belts slipping, it may be that your sheaves are burnished and in need of replacing.  I have had to do that before.

Title: Re: both belts whine, old??
Post by: 84scottsdale454 on July 25, 2011, 03:21:45 pm

Well I learned something new today lol, thanks guys! Ill check it out when I pick it up from the frame shop! Thanks