[s-cars] Bullet Dodging 101 - Phew!

[Jack Gagnon]

Fred

A couple of guesses:
Breaking the key when applying torque to the crank bolt.
Not enough torque so that it eventually came loose enough to shear the key.

I think the later is probably the cause.

Either way it was probably due to the last assembly.  I take it the belt had
60K or so? how long was it loose? Probably a while since ther was signs of
movement.
Crank that sucker tight!

Wow is Bob lucky!

Jack



-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Fred Munro
Sent: Tuesday, June 07, 2005 9:39 PM
To: Robert Myers; s-car list
Subject: RE: [s-cars] Bullet Dodging 101 - Phew!


The question, Bob, is why was the pulley moving on the crank? Was the crank
bolt loose?

Fred Munro
'94 S4


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Robert Myers
Sent: June 7, 2005 2:57 PM
To: s-car list
Subject: [s-cars] Bullet Dodging 101 - Phew!



Hi Y'all,

This lazy bald-headed old fart took his urS6 in to see the wrench today for
a new timing belt.  The belt is, as expected, still in good
condition.  Preventive maintenance, dontchaknow.  My favorite wrench is
located 120 miles from my home.  I made the run up there in almost exactly
90 minutes including two construction areas.

While removing the belt - "Hmmmm - the toothed belt pulley is a bit loose
on the end of the crank shaft - let's pull that sucker out of there and
have a look at it."

The pulley came out nicely and exposed the fact that the key which locks
the pulley has been nearly completely sheared off.  A light touch pulling
on the key with a finger tip broke it off into my hands.  There couldn't
have been more than 0.01 mm of metal holding the key in
place.  Additionally, there is evidence of some rubbing of the pulley
against its seat on the crank.  It has been shifting its position
(rotationally) by nearly the width of the key (or about 1.5
belt  teeth).  This is more than enough to have an effect on the timing.

If that key had completely sheared off it would have had the effect of a
broken belt.  The condition it was in has me wondering if I'd have even
made it home.  A new pulley is ordered and will be here tomorrow.

It appears that sometimes the Audi gods are generous.  Do you suppose they
are just building me up for an even bigger letdown?


Bob
Http://Chips-Ur-S.com
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