[V8] Sticky Tappets and Marbles

[Jason Bass]

 I as well experienced this noise after a T belt change.
 It gets louder after it warms up and is most noticeable at idle.  I believe the tensioner  mechanism is making the noise. I could see it vibrating after studying it  with the timing belt  cover removed and car running. But why? Makes me nervous. I plan on addressing the issue as soon as I'm sane.  Knock on burl wood.

Jason


--- On Mon, 1/12/09, Stafford, Kenneth A. <stafford at WPI.EDU> wrote:
From: Stafford, Kenneth A. <stafford at WPI.EDU>
Subject: Re: [V8] Sticky Tappets and Marbles
To: "v8 at audifans.com" <v8 at audifans.com>
Date: Monday, January 12, 2009, 3:24 PM

As regards the ticking/rattling
 sounds especially from the pax side, my
experience was that it gets worse with engine warming up (I assume lower oil
pressure).  An engine that quiets down when warm sounds more like sticky/bad
hydraulic lifters to me.  IIRC, there were a whole bunch of 3.6's with
similar noises a few years ago--most, ironically happening just after T-belt
change.  My own was accused as being a Diesel at idle when hot.  My 200K '91
was dead quiet immediately after start-up and always at 1500 or higher rpm. 
After playing with the belt tensioner and making certain I wasn't just
hearing belt-slap, I just figured it was probably the oil pump bearing...and
lived with it.  

Ken

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