> Ken Garratt <
unclekenz@hotmail.com> wrote:
>
>
> Phill,
>
>
>
> Thanks for that. I wonder if more recent R&D research has superseded 80s
> findings.
>
>
>
> Let me preface further comment by saying I went to my local VW service
> people (some time ago) to obtain a new spare belt. They sold me the
> untoothed version, I believe the one which is used with other
> transporters that don't have the 90 Amp alternator. Essentially they
> said that was the only one they use. HHHmmmmmmmmmmm. Not impressed.
> Surprised in fact.
>
>
>
> Anyway, so I thought to try Bursons, a pretty big auto parts supplier
> around Australia to the automotive industry.
>
>
>
> They explained the toothed belt is superseded now, replaced by a belt
> that is "ribbed" instead on its back so as to retain the ability to turn
> small diameters and as well, this newer design helps cut/eliminate belt
> squeel.
>
>
>
> Now I'm no expert so I can't comment on the validity of his explanation.
> All I can say is ... when comparing the VW toothed and the Dayco ribbed,
> they both turn equally small diameters, they both have much the same
> surface area bearing on the pulley and so far, touch wood, no belt
> squeel from the Dayco. An acid test for those who go offroad on dusty
> roads ... I've witnessed a number of syncros start up a lot of belt
> squeel when first starting the motor. perhaps put it down to the
> presence of an accumulation of dust on the pulleys and belts or else ...
> initial high loads from the alternator.
>
>
>
> So at the moment I'm using what the Bursons Rep sold me ... Dayco Top
> Cog 15430 11A 1090. Made in USA.
>
> I tend to keep my belt looser ..... as you say .... due to the water
> pump issue.
>
>
>
> Food for thought. Time will tell?
>
>
>
> Now I know you will proceed to tear my comments to shreds ...... haha
>
>
>
> Cheers.
>
>
>
> Ken
>
>
>
> To:
Syncro_T3_Australia@yahoogroups.com
> From:
plander@optusnet.com.au
> Date: Thu, 5 Nov 2009 12:29:54 +1100
> Subject: Re: RE: [Syncro_T3_Australia] fan belt
>
>
>
>
>
>
> This was a factory change during the 80s due to water pump failures. The
> toothed belt can go around a tighter radius and has more contact area
> with the pulleys so that the belt does not need to be so tight to avoid
> slippage.
>
> Pre toothed belt MV engines had numerous water pump bearing failures.
>
> Phill
>
> > Ken Garratt <
unclekenz@hotmail.com> wrote:
> >
> >
> > Gday Phill,
> >
> >
> >
> > re: "Only use a toothed alternator belt".
> >
> >
> > This gets mentioned periodically, without explanation as to why.
> >
> >
> >
> > Aside from conjecture, are there cogent reasons for only using the
> > toothed belt for the t3, compared with standard belts?
> >
> >
> >
> > Cheers.
> >
> >
> >
> > Ken
> >
> >
> > To:
Syncro_T3_Australia@yahoogroups.com
> > From:
plander@optusnet.com.au
> > Date: Wed, 4 Nov 2009 08:25:27 +1100
> > Subject: Re: [Syncro_T3_Australia] fan belt
> >
> >
> >
> >
> >
> > some of the rocks we'd scooped up on Launders had lodged in the engine
>
> > bay, and that one had found its way into the fan belt. Fortunately the
>
> > fan belt wasn't broken but will need
> > > some
> > > readjusting to overcome the shreaking and tweating.
> > >
> >
> >
http://members.ozemail.com.au/~pjlander/volkswagen_syncro.htm
> >
> > alternator belt stone guards 025 199 913 and 025 199 915
> >
> > Only use a toothed alternator belt (VW 025 903 137G) and do not
> > overtension to avoid water pump bearing failure.
> >
> >
> >
> >
> >
> >
> >
> >
> > __________________________________________________________
> > Looking to move this spring? With all the lastest places, searching
> has
> > never been easier. Look now!
> >
http://clk.atdmt.com/NMN/go/157631292/direct/01/
>
>
>
>