[s-cars] Crank woodruff key questions

[Mihnea Cotet]

Sean, the harmonic balancer and the crank pulley are 2 separate parts, held
together by the 4 allen-head bolts through the harmonic balancer. The
woodruff key is part of the crank pulley.

HTH,

Mihnea

At 07:39 14/07/2003 -0700, Sean Douglas wrote:
>Dave:
>
>Isn't the WK integral (attached) to the harmonic balancer (pulley)? I
>could be wrong, but when I did my TB, it looked like the key was part of
>the pulley.
>
>Sean
>
>
>
>
>-----Original Message-----
>From: s-car-list-admin at audifans.com
>[mailto:s-car-list-admin at audifans.com] On Behalf Of Dave Forgie
>Sent: Sunday, July 13, 2003 9:38 AM
>To: s-cars
>Subject: [s-cars] Crank woodruff key questions
>
>
>S-gruppees:  There have been several incidences of the woodruff key on
>the crank pulley failing.  I am guessing that the stiff valve springs on
>the S-cars translates into a large shear force at the woodruff key.
>There may be some variability in the key strengths and the weaker ones
>shear.  I know that they are probably designed to shear under certain
>conditions so as to protect the rest of the engine, e.g. the head from
>damage.  However, I don't think that the key should fail at any point
>during "normal" use.  As a result, I have two questions:
>
>1.  Have there been updates on the woodruff key since the 20vt engines
>were first produced to the 97 S6? (presumably the factory may have
>noticed some problems on warranty work).
>
>2.  Would it be a good idea to replace the woodruff key with a new one
>(especially if the part was updated) during a normal timing belt change,
>e.g. like doing the water pump, because you are already "there"?  I
>can't imagine that the incremental cost would be significant.  (I know,
>I know, its an Audi - what was I thinking..)
>
>Dave F.
>
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