[Shotimes] Re: Knocking update (kinda long)

[Ian Fisher]

I haven't really been following this closely. Does the
car move at all? Are you sure it isn't a transmission
problem? When I grenaded my ATX it banged really badly
and sounded horrific. I became so disenchanted with
the car that I sold it after I fixed it and bought an
MTX. What a mistake- I should have just gone to a
different car but that's another story.

Ian "I hate to love and love to hate my SHO" Fisher

--- Adam Parrott <parrotta@usa.net> wrote:
> 
> 
> Many thanks to everyone for the additional ideas and
> suggestions.
> Unfortunately, I talked with Tony again tonight to
> get an update on his
> post-weekend progress and things weren't sounding
> too good.
> 
> He told me that, even after replacing my
> apparently-good cam chain
> tensioners with known working units from a junkyard
> motor and buttoning
> everything back up for an idle test, the sound was
> still present in all
> it's ugly glory.  He's also convinced that the sound
> is internal, being
> loudest at the TB and fuel area near the 2/3 or 5/6
> cylinders.
> 
> To help answer some of the recently made points and
> to give everyone a
> quick refresher, here's a brief-run down of what
> Tony has done so far:
> 
> - Top-end tear down and inspection, including
>   Complete valve gap check - all gaps within spec
>   Cams, cam lobes, chains, and tensioners look great
>   Tensionsers were replaced with good junkyard
> units, "just in case"
>   All valves appeared to work properly during his
> "crank turning" tests
>   No evidence of any foreign debris in any of the
> cylinders
> 
> - Bottom-end tear down and inspection, including
>   Inspection of all rod bearings and related
> components
>   All 6 rod bearings sets were intact, undamaged and
> like new
>   No spun bearings or other metallic debris found in
> bottom-end
> 
> Tony says that the noise is too loud to be coming
> from the intake alone,
> but he unplugged the secondary actuator during the
> idle test just to make
> sure that the plates weren't bumping against the
> stops, like Jim Leyden
> suggested.  Unfornately, there was no change in the
> sound.  He also said
> that when the car was cranked via the starter alone
> (with no spark from the
> DIS or fuel from the fuel pump - both were
> disconnected) that the sound was
> not present - it only shows up when spark and fuel
> are applied and while
> the engine is running.  My initial testing confirms
> this as well.
> 
> The flywheel and/or torque converter have not been
> fully checked yet,
> however the flywheel *appears* to be fine aside from
> a few missing teeth.
> To Mike and others who mentioned a possible cracked
> flywheel:  what *are*
> the chances that an ATX SHO flywheel could have
> cracked?  Could this really
> be the source of the sound as evidenced by the clip
> I posted earlier?
> 
> At this point, Tony thinks that the wrist pins are
> to blame.  I'm starting
> to think so as well, and would be more inclined to
> buy into the theory if
> it wasn't for what Jim (Leyden) said about them (how
> that they don't
> usually go bad all of the sudden and usually change
> in intonation, etc).
> Does the sound clip I posted sound like wrist pins
> to anyone else?  I've
> never heard an example of V6 SHO wrist pin failure
> before, nor did I think
> that it was a "common" issue like rod bearings seem
> to be.
> 
> At this point, Tony has done all he can without
> digging in further.  If the
> problem does turn out to be wrist pins, I'll be
> pretty pissed.  My baby has
> always been a stronger runner for an ATX, and I've
> always made it a point
> to keep her well-maintained.  The engine has been
> commented on by Scott
> Patterson, Tony and others as looking/being very
> healthy and the car
> (overall) has given me few problems during my 2-year
> ownership.  Now that I
> may be looking at an engine rebuild, I'm not sure
> what to do ..
> 
> FWIW, I'm heading over to Tony's house tomorrow
> afternoon to talk with him
> and have my first look at the car since it was
> buttoned up.  I'm still
> hoping that there's something small somewhere that
> he missed; however,
> knowing Tony like I do, I don't think that will be
> the case ..  :(
> 
> Adam
> 
>
===========================================================
> Cancel your low-carb diet. Lose weight. Choose your
> own 
> foods. Learn more about our program at:
> http://click.topica.com/caaccM7b1dhxAb62fTTf/ Dr.
> Smith
>
===========================================================
> 
>
--^----------------------------------------------------------------
> This email was sent to: dataflash@yahoo.com
> 
> EASY UNSUBSCRIBE click here:
> http://topica.com/u/?b1dhxA.b62fTT.ZGF0YWZs
> Or send an email to: TechSHO-unsubscribe@topica.com
> 
> For Topica's complete suite of email marketing
> solutions visit:
> http://www.topica.com/?p=TEXFOOTER
>
--^----------------------------------------------------------------
> 
> 
> 



	
		
__________________________________
Do you Yahoo!?
SBC Yahoo! - Internet access at a great low price.
http://promo.yahoo.com/sbc/