[s-cars] Knocking developed while on highway - AC relay?

[chris chambers]

Dennis,

that's what I mentioned to Azeem already, but I don't know
where the AC relay is can you provide this information for him?

Chris

--- dgraber460 at aol.com wrote:

> FWIW I seriously thought I threw a rod when my AC compressor went
> toes up. Backing out of the driveway, and it started knocking just
> like a rod bearing. Pull the AC relay to confirm. One can hope.
> 
> 
> Dennis Graber
> Quality Linings & Painting
> Denver, CO
> 
> 
> -----Original Message-----
> From: Tom Green <trgreen at comcast.net>
> To: s-car-list <s-car-list at audifans.com>; Azeem Elahi
> <azeem.elahi at gmail.com>
> Sent: Wed, 7 May 2008 8:11 am
> Subject: Re: [s-cars] Knocking developed while on highway
> 
> 
> 
> Wow, real answer is I don't know, so you can ignore the rest if you  
> like.
> 
> I guess a quick engine burp could rotate the engine on bad motor
> mounts
> enough to tear the intake hose.  Otherwise, I would think you would  
> have had
> other indications if the hose was torn for a while, i.e., MIL or
> miss/ 
> jerk on
> acceleration.  But what could cause such movement to tear the hose?  
>  
> Look
> under the upper timing belt cover to check for any visual damage.    
> If you
> see anything suspect, I wouldn't turn the engine over any more until 
> 
> you can
> confirm it's ok, and valve sprockets and crank/flywheel marks align  
> at TDC.
> 
> I read that you have the knocking noise at idle and hear it just  
> looking under
> the hood?  Check the hydraulic fluid level, since the pumps are known
>  
> to be
> noisy (knocking sound) especially when low on fluid.  It, or another 
> 
> accessory
> could be failing (alternator, A/C compressor, or water pump) and can 
> 
> put such
> a load on the engine that it appears to be a miss.  Check condition  
> of the
> serpentine belt for any excessive wear.  A long screwdriver (plastic 
> 
> end to the
> ear) or mechanics stethoscope can help isolate the noise source if  
> you don't
> find any visual indications.
> 
>   You will want to check for DTCs and clear them also.  Oil from the 
> 
> crankcase
> vent system will deteriorate the intake hose and cause it to crack at
>  
> the clamp,
> so this part may just be a common issue.
> 
> Tom
> 
> > Date: Tue, 6 May 2008 17:58:05 -0500
> > From: "Azeem Elahi" <azeem.elahi at gmail.com>
> > Subject: [s-cars] Knocking developed while on highway.
> > To: s-car-list <s-car-list at audifans.com>
> > Message-ID:
> >   <c35bfa520805061558n4b44f96cne4afd7978271f09f at mail.gmail.com>
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Need some help guys.  As I was driving home from work in my '95 S6,
> I
> > noticed a slight miss/hesitation for 1 second which was quickly  
> > followed by
> > knocking from the engine cabin. I immediately pulled over and gave 
> 
> > it a good
> > listen to make sure of the source, and it does indeed seem to be  
> > coming from
> > within the engine.  I also noticed the turbo inlet hose has tore  
> > off (the
> > hose that goes from the intake to the turbo).  Car was driving  
> > perfectly
> > before hand, and always had regular oil changes.  Oil level is  
> > perfect, no
> > smoke out the tailpipe.  What the heck could have happened here?!?
> 
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