[s-cars] clutch replacement

[Douglas Landaeta]

a simple uncertainty in the decision and risk analysis: how do you know that
someone else hasn't 'hit the yield point' in a prior installation? net
result of analysis = always replace ;-).

my .02
Doug

On Tue, Aug 5, 2008 at 12:11 PM, Jerry Scott <jerryscott at wispertel.net>wrote:

> As an engineer we learned in school that steel will stretch and return to
> its original length without damage unless you hit the yield point of the
> curve.  So, why can't they be reused as long as they are kept in the Hook's
> law range of the yield?  I don't intend to reuse them, but don't see why
> not.
> ----- Original Message -----
> From: "Peter Golledge" <petergolledge at gmail.com>
> To: "'Jerry Scott'" <jerryscott at wispertel.net>; "'Tom Green'"
> <trgreen at comcast.net>
> Cc: "'s-car list'" <s-car-list at audifans.com>
> Sent: Tuesday, August 05, 2008 9:45 AM
> Subject: RE: [s-cars] clutch replacement
>
>
> > Jerry,
> >
> > Bolts with a Torque Spec + Turn are meant to stretch with the additional
> > turn.  Many head bolts have the same setup.  Don't reuse these as they
> > only
> > stretch once. :-)
> >
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com
> > [mailto:s-car-list-bounces at audifans.com] On Behalf Of Jerry Scott
> > Sent: Tuesday, August 05, 2008 8:16 AM
> > To: Tom Green
> > Cc: s-car list
> > Subject: Re: [s-cars] clutch replacement
> >
> > Tom
> > I'm picking up the clutch today here in Denver and will start assembling
> > today.  I will go with the stock LUK and stock flywheel.  The problem
> with
> > the clutch was oil leakage from the trany onto the disc.  The car has 91K
> > and the clutch looked like it was less than 1/2 gone.  I heard others say
> > that the trany seal caused the slippage.
> >
> > Thanks for the torque specs - that will be very helpful.  The bolts for
> > the
> > flywheel required a 6 point socket and big breaker bar to get it loose.
>  I
> > can't imagine why they just don't give a final torque number instead of
> > the
> > 1/2 turn after a torque number.  Yes I noticed the offset of bolt holes,
> > so
> > looks like the dual mass flywheel is tuned to a specific crank angle.
> >
> > I'll have some pictures when done and will add them to the write-up by
> > Chad
> > Tobin.
> >
> > The trany seal was a little difficult to remove.  The engine seal was
> > easier, but had to drive a pry bar into it.
> >
> > I'll let you know when it's done.
> > Jerry
> > ----- Original Message -----
> > From: "Tom Green" <trgreen at comcast.net>
> > To: "s-car-list" <s-car-list at audifans.com>; "Jerry Scott"
> > <jerryscott at wispertel.net>
> > Sent: Monday, August 04, 2008 3:21 PM
> > Subject: Re:[s-cars] clutch replacement
> >
> >
> >> So, are you putting things back together already, Jerry?  What clutch
> >> and
> >
> >> flywheel did you decide on?
> >>
> >> Bentley knows the specs.  :-)   Generally, he says M6= 7 ft lb. M8 =  15
> >> ft lb.  M10 = 33 ft lb. and M12 = 44 ft lb.
> >>
> >> The M8 clutch bolts call for 18 ft lb. after pressure plate is on
> >> locating pins and firmly seated.  That's about
> >> all you can do with an allen wrench anyway.
> >>
> >> The M10 flywheel bolts call for 33 ft lb. + 1/2 turn.  I believe the
> >> stretch is allowed in increments if you can't
> >> make the 1/2 turn all at once.  You noticed the bolt holes are offset
>  so
> >> the flywheel only matches up in one
> >> position?  The OEM bolts are triple-square with a shallow hex head.
> You
> >> need to get the tool fully inserted
> >> and square on those to stretch it.  Maybe you want a spare even at  that
> >> price?
> >>
> >> The engine assembly/disassembly pages C13-21/22 show 22 ft lb. and  1/4
> >> turn, but I am certain this is an
> >> error, since the V6 engine calls for 33 ft lb + 1/2 turn also, and  the
> >> 22
> >
> >> ft lb. isn't enough to ensure any bolt
> >> stretch in 1/4 turn.  I just mention this so you will be aware of it  in
> >> case someone saw those numbers and
> >> gave them to you without realizing they conflict with all other parts
>  of
> >> the manual.
> >>
> >> I hope this is helpful and not just confusing.
> >>
> >> Tom
> >>
> >> On Aug 3, 2008, at 5:55 PM, Jerry Scott wrote:
> >>
> >>> Does anyone know the torque spec. for the flywheel bolts and the
>  clutch
> >>> bolts?
> >>> Jerry
> >>
> >
> > _______________________________________________
> > S-CAR-List mailing list
> > S-CAR-List at audifans.com
> > http://www.audifans.com/mailman/listinfo/s-car-list
> >
>
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
>



-- 
http://www.hdradio.com