[V8] Valve or Timing Belt Rattle?

[daves745t at optonline.net]

Thanks for the responses guys. The garage that did the work was Egentons - from what I know it is probably one of the most well-respected indy mechanics in NJ, so I really hope (and believe) that they followed the procedure. That being said, you never know. But for the distance, I definitely would have taken it to Bruce at AudiConnection.  I provided my guy with all the parts based on Bruce's list, including the friction pad and they didn't give me anything back when I picked it up :)!

I'm really hoping that something was undertorqued or a little loose, as opposed to one a bad bearing that would require a total teardown. If it was a bad oil pump or roller bearing, would the rattle still sound like it was coming from the top of the engine? In any event, I'm taking no chances - she's going in tomorrow for a check up. I'll let everyone know what happens.
-DaveM 

----- Original Message -----
From: Dave Head <v8q at bellsouth.net>
Date: Monday, May 9, 2005 7:22 am
Subject: Re: [V8] Valve or Timing Belt Rattle?

> 1. V8s have hydraulic lifters - no adjustment.
> 2. Did you or your mechanic follow the timing belt adjustment 
> procedure 
> for setting the belt tension? It's specific!
> 3. Could be an undertorqued cam pulley, a bad oil pump drive 
> bearing, 
> roller/tensioner bearing, timing belt tight/loose out of spec.
> 4. The belt can be inspected by removing the driver's side cover 
> (after 
> removing the electric fan).
> 
> daves745t at optonline.net wrote:
> 
> >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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