<VV> Fan belt tension

[corvairduval at cox.net]

Belt hum, fan hum, or bearing hum? Listen at idle and increased rpm with a
rubber hose at each part to see what is the sound you hear.

If you cannot repeat the noise doing this, it may be drivetrain related.
Countershaft hum?

Frank DuVal

Original Message:
-----------------
From: Bryan Blackwell bryan at skiblack.com
Date: Wed, 11 Apr 2012 15:54:54 -0400
To: 62vair at gmail.com, virtualvairs at corvair.org
Subject: Re: <VV> Fan belt tension


I assume you've taken the belt off briefly to verify it's really the belt. 
My first thought would be try a different brand of belt.  Second thought is
to run it a smidge looser or tighter to see if that changes things.  Also
check over the pulleys themselves for flaws.

--Bryan

On Apr 11, 2012, at 3:43 PM, Mark Durham wrote:

> ok all, I've got my tension set as described, loose enough to turn the
> fan, however, I have a belt relate hum at the same rpm in each of the 4
> gears. How do you cure that?
> Mark Durham

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