Warbling water pump??

[Bill Phelps]

When I did mine, I tensioned the belt per the Book of Bentley... so it can
only be twisted 90 degrees I think.. and it still makes the noise... I've
always wondered if it is some kind of cavitation in the water pump chamber
that causes the problem. All I know is that it is at a very specific RPM,
just off idle. Not a big deal, just kinda bugs me..

Thanks for all the input.

Bill


> -----Original Message-----
> From:	Konstantin Bogach [SMTP:konstantin.bogach at morganstanley.com]
> Sent:	Wednesday, July 31, 2002 10:13 AM
> To:	bswann at worldnet.att.net
> Cc:	'wphelps at rizzo.com'; 'quattro at audifans.com'
> Subject:	Re: Warbling water pump??
>
> In all three cases I made minimal tension.  A little bit less and I am
> afraid
> the belt can slip.  Tensioner is relatively new - 2 years.
> Plus, using stetoscope I hear that noise comes from pump.
>
> Konstantin.
>
> Ben Swann wrote:
>
> > [I changed 3 pumps trying to get read of wp sound.  First two it was
> > whining.  Third one
> > sounds like warbling, maybe.  It does noise  in 1200-1400 rpm range.  At
> > least I can hear
> > it.  Gave up after listers responses saying they also have for years.
> >
> > Konstantin.]
> >
> > Most likely culprit is the tensioner pully making the noise (like a
> turkey
> > gobble) because the water pump tension is too tight.  Common problem.
> >  Relieve the tension just a tad, or live with the noise until the
> tensioner
> > dies(not usual), or possibly will stop making the noise eventually(after
> > about 10k miles).
> >
> > Ben