coolant leak to timing belt job?

Wed Aug 2 14:22:49 EDT 2006

My premise is that the water pump leak is due to the loosening of its bolts
which would also explain the loose timing belt.  I did not have any untoward
noises from the area prior to noticing the leak.

If, when I attempt to adjust the belt tension with the w/p, I don't have
some confidence that that was the cause, I will re-examine my course of
action at that time.  If I do decide to dig further, i.e. remove the w/p for
inspection/replacement, I'll probably put a new belt on them too.

A couple Saturdays ago I used a friends 600 ft/lb to remove the crank bolt
on my V8.  It wouldn't budge it until I put some heat on the bolt.  I don't
know who/how it was last installed except that it had quite a gooping of
some sort of thread locking sauce on it.

Ed

On 8/2/06, Schaible, David <David.Schaible at jrspharma.com> wrote:
>
> If your water pump seal is leaking, there is no "fix in a can" for that
> and the leak will come from the bottom of the t-belt cover.  If you hear
> any noise coming from that water pump replace it now, many a 20v has
> been trashed by the wp pulley going and slipping the t-belt.  What does
> a t-belt cost ? $20 ?  I would replace it. When my wp went I replaced
> the belt...thank the audi gods that the t-belt did'nt slip.....otherwise
> I replace the t-belt at ~100k whether it needs it or not.  I am closing
> in on my 300k belt change and heard from my friend that the audi crank
> locking tool is real cheap now......
>
> My 625 ft/lb impact gun struggles with wheel bolts that I can remove
> with a 2ft breaker bar.....maybe it ain't what it claims
>
> -----Original Message-----
> From: Ed Kellock [mailto:ekellock at gmail.com]
> Sent: Wednesday, August 02, 2006 1:17 PM
> To: 200q20V mailing list
> Subject: Re: coolant leak to timing belt job?
>
> I really appreciate all the response on this issue (and others too!).  I
> did
> some bedtime reading of the Bentley and combined with the collective
> wisdom,
> I feel much better about the situation.  Having done 2 V8 timing belt
> jobs
> helps my confidence too.
>
> Here's where I'm at and the course of action I intend to pursue:
> I have a very young, very good looking but loose timing belt and a still
> somewhat mysterious coolant leak with no obvious source at any hose
> connection.
> I have the p/s pump out and new tstat in hand, along with a new piece of
> hose for the otherwise inaccessible turbo coolant line hose.
> I do not have any of the bumper, grill, or front end stuff off at this
> point.
> I believe I have sufficient access to adjust the timing belt.
> I will do that and replace the t-stat and the one small hose.
> And I will rotate the engine to confirm timing marks afterwards just
> for
> some piece of mind.
> Then I'll reassemble and run/drive it and see how the leak situation is.
>
> If I have to go back in to fix a persistent water pump leak, I may throw
> on
> a new tbelt.
> I might even fix what ain't broke and put in a new w/p too and endure
> some
> chastising from Bernie.
> (These two parts seem relatively cheap compared to those in my 2 V8's).
>
> At 33k, I'm right in the middle of the life that the majority of people
> consider acceptable and would not necessarily feel uncomfortable going
> Bernie's route and going forward with the current belt.  I would not be
> comfortable going into triple digits with it however.  Having said that,
> my
> CGT has 141k miles and the timing belt in it was installed at about 90k
> miles... 12-13 years ago.  So I feel like I'm following Bernie's advice
> there, without necessarily intending to.  (No I haven't even pulled the
> cover to have a look at it).
>
> So, tonight another wrenching session.  In the last 10 days I've spent
> just
> about all my free time working on cars.  For now, I'm actually enjoying
> it.
>
> Ed
>
>
>
> On 8/2/06, John S. Lagnese <jlagnese at massed.net> wrote:
> >
> > Its waaaayyyy better to err on the side of caution with the belt. The
> > alternative is catastrophic!
> > John
> > ----- Original Message -----
> > From: "Bernie Benz" <b.benz at charter.net>
> > To: "Ed Kellock" <ekellock at gmail.com>
> > Cc: "200q20V mailing list" <200q20v at audifans.com>
> > Sent: Wednesday, August 02, 2006 11:52 AM
> > Subject: Re: coolant leak to timing belt job?
> >
> >
> > > Ed,
> > > Your TB is hardly broken in yet. I run mine well into tripple digit
> > > mileage,
> > > only changing after that point if I must be in there for something
> else.
> > > Seal restoring snake oil beats seal changes every time.
> > >
> > > Bernie
> > >
> > >> From: "Ed Kellock" <ekellock at gmail.com>
> > >>
> > >> I'm with you on this all the way Bernie.  The t-belt was done 33k
> ago
> > and
> > >> it
> > >> looks good as well.  I am hoping to get away with a simply
> readjustment
> > >> of
> > >> the tension.
> > >>
> > >> Thanks!
> > >> Ed
> > >>
> > >>> -----Original Message-----
> > >>> From: Bernie Benz [mailto:b.benz at charter.net]
> > >>> Sent: Wednesday, August 02, 2006 7:50 AM
> > >>> To: Kneale Brownson; Ed Kellock
> > >>> Cc: 200q20V mailing list
> > >>> Subject: Re: coolant leak to timing belt job?
> > >>>
> > >>>
> > >>> The 90 degree twist test is good enough for single cam S5s
> > >>> but, IMO, not tight enough for the twin cams. Give it a
> > >>> little more, but DF what AB!
> > >>>
> > >>> Bernie
> > >>>
> > >>>> From: Kneale Brownson <kneale at coslink.net>
> > >>>> Date: Wed, 02 Aug 2006 07:45:33 -0400
> > >>>> To: "Ed Kellock" <ekellock at gmail.com>, "'q - 200q20v'"
> > >>>> <200q20v at audifans.com>
> > >>>> Subject: Re: coolant leak to timing belt job?
> > >>>>
> > >>>> Swinging the water pump is how you adjust the tension on a
> > >>> 3B timing
> > >>>> belt, Ed.  Proper tension "test" according to Bentley is only
> being
> > >>>> able to twist the belt "90 degrees with the thumb and
> > >>> forefinger midway between the
> > >>>> camshaft and the pump sprocket".   Doesn't specify any
> > >>> measure for finger
> > >>>> and thumb strength, of course.  More than likely, a leak
> > >>> from the pump
> > >>>> means it's time to replace it and you might as well replace
> > >>> the belt,
> > >>>> seals and idler while you're at it.
> > >>>>
> > >>>>
> > >>>> At 11:23 PM 8/1/2006 -0600, Ed Kellock wrote:
> > >>>>> My pursuit of a coolant leak in the Avant has uncovered a
> > >>> seriously
> > >>>>> loose timing belt.  I had thought the leak was suspiciously
> coming
> > >>>>> from an area that could certainly have been from the w/p.  None
> of
> > >>>>> the many small hoses, buried by the now removed p/s pump
> > >>> seem to have
> > >>>>> been leaking.  Is it true that the timing belt tension is
> > >>> provided by
> > >>>>> adjusting the water pump?  I know that's how it is on the AAN
> but
> > >>>>> haven't played the t-belt game on a 3B or any 10v motor
> > >>> before.  My
> > >>>>> theory is that the water pump adjustment came loose and the
> water
> > >>>>> leak is a symptom of that.  Boy am I glad I parked it and
> > >>> got the V8
> > >>>>> t-belt done and out of the garage before digging into this.
> > >>>>>
> > >>>>> The belt is so loose that I can wiggle it back and forth
> > >>> on the water
> > >>>>> pump pulley.  I could pop it off with one finger if I
> > >>> wanted to.  I
> > >>>>> can bend the belt 90 degrees with one finger.  The
> > >>> opposite length of
> > >>>>> it between the cam pulley and crank pulley is snug, but
> > >>> also easily
> > >>>>> turned 90 degrees.
> > >>>>
> > >>>> _______________________________________________
> > >>>> 200q20v mailing list
> > >>> http://www.audifans.com/mailman/listinfo/200q20v
> > >>>
> > > _______________________________________________
> > > 200q20v mailing list
> http://www.audifans.com/mailman/listinfo/200q20v
> > >
> >
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