WTB - 944S AC crank pulley

911tracker85 · 07-01-2017, 06:25 AM

I need the crank pulley/damper for an S. has rubber separating the inner and outer rings of the pulley.

per PET 944 102 123 02

Bob Cox

9FF · 07-02-2017, 04:37 AM

Quote:

Originally Posted by 911tracker85

I need the crank pulley/damper for an S. has rubber separating the inner and outer rings of the pulley.

per PET 944 102 123 02

Bob Cox

The S has what's known as a "harmonic balancer" and 30yo used ones are likely to be worn and ineffective. Get a new factory one if you can find one or there are a couple of improved aftermarket ones out there, check rsbarn.com.

911tracker85 · 07-02-2017, 05:38 AM

yea, finding it hard to find, and appears only a few left in Germany.

does anyone know the consequences/impact of installing non-damper version?

9FF · 07-03-2017, 03:37 AM

Quote:

Originally Posted by 911tracker85

yea, finding it hard to find, and appears only a few left in Germany.

does anyone know the consequences/impact of installing non-damper version?

It must do a good job of dynamically balancing the rotating mass as with a regular pulley there has been more nvh reported. Could also prevent harmonics causing early oil pick-up tube, fuel rail or other mechanical failures. I doubt Porsche would have spend time to develop and manufacture such an upgrade if it wasn't required.