[V8] Valve or Timing Belt Rattle?

Ingo Rautenberg i.rautenberg at waratap.com
Mon May 9 10:40:21 EDT 2005


I don't like the sound of that.  Who did the work?  To make sure isn't not
an accessory belt problem (rather than TB), I'd temporarily remove the
accessory belt to isolate the problem.  Definitely check the TB belt
slackness.  The fact that this is occurring just a few hundred miles after
the TB change does lead one to suspect this area.  I suppose that the cam
chain for that bank could be loose as well, but have no experience there.

Good luck.

----- Original Message ----- 
From: <daves745t at optonline.net>
To: "Audifans V8" <V8 at audifans.com>
Sent: Monday, May 09, 2005 12:13 AM
Subject: [V8] Valve or Timing Belt Rattle?

> First off - thanks Kneale for the Hood release tip - what a PITA!
> The reason I was trying to pop the hood was to further diagnose a rattle
I'm hearing on the right side only - 99% sure it's originating from the
valve cover.  I just had the timing belt and all the stuff listed on
AudiConnection's site changed a couple of months/several hundred miles ago
belts, bearings, pumps - the works. A couple of weeks ago I noticed a very
slight 'ticking' that could only be heard with the hood up and listening
closely.  I thought it was a slight valve slap - and honestly wasn't sure
whether it was there even before the timing belt was replaced.  In any
event, it has now progressed to where it's definitely more noticeable and
sounds like more than one.
> I was thinking that it needed a valve adjustment and Googled it, and
somehow stumbled on the Timing Belt Rattle issue. Does the V8 ever need its
valves manually adjusted (I couldn't find anything about it)? Someone
mentioned a 'tension adjuster screw', 'plastic friction block' (are they the
same?) and/or various bearings. Is there a way to determine or eliminate any
possible culprits?
> Finally - how concerned should I be about driving her?  Last thing I'd
need is to have a some major internal snafu after just sinking a couple of
grand into her for the sole purpose of that not happening!
> Thanks!
> DaveM
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