[V8] Engine Noise?

[dsaad at icehouse.net]

Someone already went through this - but the oil pump bearing goes bad, and it
causes a nasty rotating rumbling sound at idle. Mine went out around 110000
miles.

It is expensive to replace - you basically have to do a timing belt job + the
labor and parts for the bearing - and the bearing was near $100 as I recall so
be sure to eliminate the other possibilities first. The bearing is easy to
change - once the timing belt is off. double check:

 - alternator bearings
 - accessory belt idlers
 - engine fan bearing (the same bearing as the oil pump bearing - as stated
before, buy the oil pump bearing for both uses as it is quite a bit cheaper)
 - engine fan viscous clutch bearing
 - timing belt idlers

Dave

Quoting AWHdcny at aol.com:

> I am also experiencing the same noise from the engine with about the same
> conditions.  I have a '93 V8Q, 150,000 miles.  This noise is  rotational and
> very elusive as to the source.  I am also wondering  what is the cause given
> that, the obvious culprits have been ruled out on my  vehicle.  It is at
> Audi
> Connection presently for some  upgrades and to check out this 'noise'.  Any
> ideas
> or solutions would also  be appreciated.
>
> Allan Holland
> '93 Audi V8Q
> '90 VW Corrado
> '73 MB 450SEL
> '91 Suzuki Samurai
>
>
>
> Date: Wed, 3 Nov 2004 00:21:00 -0800
> From: Frankie Rossi  <frankie.rossi at gmail.com>
> Subject: [V8] Engine Noise?
> To:  V8 at audifans.com
> Message-ID:  <da34ddd04110300214041ec80 at mail.gmail.com>
> Content-Type: text/plain;  charset=US-ASCII
>
> I get this weird noise from the front of the engine that  sounds almost
> like a belt is getting tired but not quite that. It doesnt do  it when
> the engine is cold, but does when it is warm and or has been ran  for
> awhile. Also i can only hear it at low speed, it seems to either  go
> away at higher speeds (above 1500RPM) or is drowned out by  the
> engine... Its not the lifters because i can hear that on occasion  and
> that goes away for the rest of the day after the morning start.  This
> noise sounds like a "chush chush " with a touch of "clank" in it  and
> sounds like its coming from the front passenger side of the  main
> engine block.
>
> Any ideas?
>
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audi-quattro.org/cgi-bin/twiki/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all
> contributions welcome!
>