squeaking noise on '88 80Q

[Joshua Van Tol]

Oleg,

I had a vw quantum (virtually the same engine) that did that for years.
Nothing bad ever happened. I suppose that the water pump bearings probably
wear a little faster. If you didn't just do the timing belt, I'd think twice
about adjusting the belt. There's a good chance that if you do, the o-ring
on the water pump won't re-seal, and you'll have to replace the o-ring,
which is a pain.

Josh

On Fri, Oct 8, 2010 at 1:54 PM, Oleg Rekutin <quattro at 36hz.com> wrote:

>  Thank you! How unsafe is it to leave the timing belt like that? Hopefully
> I can get to it by the end of this month, but I need to replace the strut
> mounts, shot struts and control arm bushings before that (direct safety
> issue).
>
> - Oleg
>
>  On Fri, 08 Oct 2010 13:06 -0500, "Joshua Van Tol" <josh at spiny.com> wrote:
>
> 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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