squeaking noise on '88 80Q

[Joshua Van Tol]

The "warbling" noise is caused by the timing belt being too tight. Try
loosening it a touch, and it should go away. I've heard of dealer techs
using a technique where the water pump is installed slightly loose, and the
belt slightly tight. Then start the engine, and use a brass drift and hammer
to loosen the belt a bit at a time until the noise goes away. Then tighten
the bolts on the water pump the rest of the way.

I've never had the guts to try that.

The clicking might be a lifter, or perhaps the vacuum pump. You can test the
latter theory by removing the push rod for the pump and see if it still
makes noise.



On Fri, Oct 8, 2010 at 12:25 PM, Oleg Rekutin <quattro at 36hz.com> wrote:

> '88 80 Quattro 227k.
>
> Two videos: when running cold, almost no squeaking noise, but you can
> start hearing it:
>
> http://www.youtube.com/watch?v=H1vAmZYXce8
>
> Idling warm, much more pronounced squeaking noise:
>
> http://www.youtube.com/watch?v=VHUml_wfMlA
>
> When the engine is revved to 1500 RPM or so, the squeal/squeak goes
> away. It comes back when the RPMs return to idle.
>
> What could that noise be? Is this a pulley on an accessory belt of some
> kind? Or is this a major engine issue?
>
> Also, what's that clicking noise (easily heard in the "cold idle"
> video)?
>
>
> Thanks!
> - Oleg
>
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