Re: 4Kcsq New Timing Belt Whine?

[DeWitt Harrison <de@aztek-eng.com>]

On Sun, 04 Oct 1998 14:39:50 -0700, Daniel G. Fulton wrote:

>Just installed a new timing belt and water pump on my '86 4kcsq.  It
>runs great, but the new belt whines quite a bit.  What could be the
>cause?  Took the cover back off and can't see anything rubbing.  Is this
>a tension problem?  Looking for some expert advice.  The old belt wasn't
>noticeably stretched and ran quiet.  I noticed the new TRW belt I got
>from Blau wasn't quite as thick as the one I replaced.

Here are a couple of possibilities: it sometimes happens that the water
pump shaft is a touch longer than the original and rubs the timing belt
cover or that the idler wheel, which ought to have been replaced also,
may now be complaining about the tightness of the fresh timing belt.
There is also a tendancy to over tighten the belt. Many folks have better
luck using 3/4 twist rather than the 1/2 twist tightness criteria found in
Bentley. Finally, some water pumps seem prone to squeaking.

DeWitt Harrison
Boulder, CO
88 5kcstq