[V8] engine rattle
kyle_leatherwood at hotmail.com
Mon Oct 9 22:24:19 EDT 2006
My V8 5 speed has had 2 new oil pump bearings within the last year. First
time I thought it wasn't replaced when t-belt was done before I purchased
vehicle. Second one was when the noise DIDN'T go away after putting in all
new timing belt components, including oil pump bearing, and I thought the
new one I installed was bad. Needless to say, the noise is still there.
I think I am going to TRY the oil pump first based on Keith's
recommendation, and move on from there if it doesn't go away. 32 new
lifters aint cheap for this baby, even though all the labor is free.
>From: "Ed Kellock" <ekellock at gmail.com>
>To: <v8 at audifans.com>
>Subject: Re: [V8] engine rattle
>Date: Mon, 9 Oct 2006 16:10:03 -0600
>On my 5spd it's really noticeable. So much so that I won't be using it
>until I've changed it.
>Sunday I changed the thermostat on the '90 V8 (the old one was opening too
>soon so not much hvac heat in the winter). I'm pretty sure I recognized a
>similar sound coming from it too. It's not nearly as bad as my 5spd, but
>I suspected, it looks like I'll be doing both of these.
>On both, I changed everything else, belt rollers, idlers, tensioner,
>damper arm, friction pad, w/p of course. I just don't recall ever seeing
>mention of the oil pump bearing as a maintenance item. If I had, I'd have
>done it for sure. Guess I'm really going to hone my V8 t-belt skills here
>pretty soon. Fortunately with my 5spd needing it first, I should be pretty
>proficient when I do the '90 which really needs to be out of service for as
>little time as possible.
>Oh yeah, from the look of the inside of the right front summer wheel I just
>took off, it needs a new outer passenger side cv boot up front too.
>I used my gf's Firebird today to go to the hardware store and a doctor's
>appt. It's been drizzling since yesterday. No way I'd give up quattro.
>And all in all, the V8's together have been less trouble than one 200 or
> > -----Original Message-----
> > From: v8-bounces at audifans.com
> > [mailto:v8-bounces at audifans.com] On Behalf Of dsaad at icehouse.net
> > Sent: Sunday, October 08, 2006 5:32 PM
> > To: v8 at audifans.com
> > Subject: Re: [V8] engine rattle
> > Many of us have had this happen right after a t-belt job. It
> > seems the bearing for the oil pump does not like to play nice
> > with a new timing belt for some reason. The usual cure is to
> > replace this bearing - which of course means removing the
> > t-belt again. It is not clear that the old bearing is really
> > bad - it just gets noisy.
> > The noise also radiates all over the motor - just to make
> > diagnosos more fun.
> > You might also have a look at the damper assembly - including
> > the friction pad.
> > Dave
> > Quoting Peter Sikkila <p.sikkila2 at comcast.net>:
> > > I too have this rattle from the same area of my 93. I
> > bought it from
> > > the 2nd owner with 110k and the original timing components.
> > Drove it
> > > home and parked it until I could change the belt and all related
> > > parts. I never heard the rattle before I replaced all of the timing
> > > components,but it was "new" 93. I have 2 90's & a 91 parts
> > donner so I
> > > was just drooling over the 93 and not really listening to
> > everything.
> > > Now, after the belt change there is this distinct noise from the
> > > drivers side head. It is not there when the engine is cold.
> > Once the
> > > engine comes up to temp. you can here the "rattle". I went
> > back in and
> > > completely tore it all down & rechecked everything
> > including the oil
> > > pump bearing.I couldn't find anything that was wrong. Put
> > it all back
> > > together, runs great, but the rattle is still there when it's up to
> > > temp. I can buy into the lifter theory,but to me it really doesn't
> > > sound like one that is bleeding down. The "rattle" seems to
> > come from
> > > the timing belt teeth meeting the cam gear. I too would
> > like to find
> > > the reason for the 'rattle!
> > >
> > > Regards
> > > Peter
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