[s-cars] [s-cars} Was Bad CPS - Now Bad Crank Pulley

[Darin Nederhoff]

On Thu, June 22, 2006 8:47 pm, Tom Mullane said:

> Unless, of course, the harmonic balancer failed in such a way that the
> timing mark on the balanced moved in such a way that it was no longer
> correctly related to the key on the sprocket.  That may have resulted in
> the
> belt coming off right but going back on wrong (despite being in line with
> the timing marks).  If that's the case, it's tough to blame the dealer
> 100%.  I can't say that I would have caught that and I've done a belt or
> two.  Does anyone know if this is possible?  Seems worth considering given
> that the parts price must cover more than just the sprocket...


Having BTDT on my father's S4 I don't see how the harmonic balancer could
fail in a way that would screw up timing.  The balancer is pretty much
just a weight with a rubber bonding to a pulley.  Failure of the balancer
would likely be a result of the rubber bonding letting go which is what
happened on my father's car.  The worst thing it was doing was making a
chatter noise and making the engine feel as if it were running rougher
than normal at throttle tip-in.  When I replaced it, I was somewhat
shocked to see that I could rotate the weighted portion of the balancer
180 degrees on the center hub... I will look to see if I snapped a picture
of it and post it if possible.

My .02,


-- 
Darin Nederhoff
http://www.s-cars.org