Changing timing belt and noisy hydraulics

[ccohen5]

Many thanks - I agree on all points. One question thoough.  Not having seen
how the timing belt fits on my car, but the use of the 2079/2084 tool combo
makes me conclude that the lower crank pulley has to come off.  Why is this
necessary?  The Bentley seems to show that the belt (admittedly for the Urq)
is long enough to require the water pump pully to be used as the tensioner.
I can understand using 2084 to make sure that the cam and crank pulleys do
not vary from TDC if one does not use the screwdriver trick, but why would
one have to retorque the retainer bolt unless the oil pump was being removed
for check or replacement?

  Your observation on the hydraulic pump
is the that which I would conclude: too tight always runs a bearing load
risk.  But the document is quite clear.  Typical OEM BS if you ask me.

There have been some posts last week on tool sources which I will now
follow up.  Thanks everyone for those.

Colin

----- Original Message -----
From: "Phil Payne" <quattro at isham-research.com>
To: "ccohen5" <ccohen5 at compuserve.com>; "qlist" <quattro at audifans.com>; "s
car" <s-car-list at egroups.com>; <urq-request at audifans.com>
Sent: Tuesday, November 13, 2001 6:28 AM
Subject: Re: Changing timing belt and noisy hydraulics


>
> > So by mutual agreement, it is the safe and sensible thing to do even
> though
> > there is no time or mileage requirement in any of the documentation I
have
> > on the Sport Quattro.  So:
>
> Yup - do it.  It's due under the five-year rule.
>
> > Do I need the special tools 2084 and 2079 to do this assuming the engine
> is
> > configured like the RR series?  It would not seem so as the belt is
> > tensioned by moving the water pump, right?
>
> Yes, it's quite similar to the RR.  You need #2084.  #2079 is optional -
> it's only any use if the car is on a ramp.  I prefer to use a monster
torque
> wrench.
>
> > Also, I have remarked that after replacing the HP hydraulic hose, I have
> > some noise at low speed from the pump. Some have said this is because
the
> > replacement hoses are inferior to the Audi OEM.  While I agree this may
be
> > possible, however on browsing the service bulletins from VW Tech, I
> noticed
> > that 46-88 says that this can occur because the belt is not tight
enough.
> > They advise that after tightening the belt to normal tension, tighten it
> > some more!  They say this will not harm the pump and will reduce the
> noise.
> >
> > Anyone had this experience?
>
> I think I've had the _opposite_ - I found a car last year with a
> phenomenally tight belt and the pump bearings were shot.
>
> --
>   Phil Payne
>   http://www.isham-research.com
>   +44 7785 302 803
>   +49 173 6242039