View Single Post
JFairman JFairman is offline
Registered User
Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
To add to this the TDC mark on the 911 fan housing that you use to align the Z1 mark on the pulley is not accurate but the split case seam under it is. Unfortunately the fan housing covers up the case seam when it's installed.

If you align the pulley Z1 mark with the case seam while timing the cams and then install the fan housing you'll see that the fan housing mark is a little off.
Maybe not all of them are but the one on my '87 is and so is a friends '87 and we both have factory Porsche magnesium fan housings.
Old 06-22-2014, 09:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)