View Single Post
911-32 911-32 is offline
Registered User
 
911-32's Avatar
 
Join Date: Sep 2003
Location: London
Posts: 644
Garage
Well the engine is now apart again. The good/bad news is that my mechanic has found what the problem was. More than half of the valve stem seals are wrecked as they have been pinched between the valve guide and the collar/retainer. It was like running a motor with half the valve stem seals missing - hence the massive oil use. They have learnt that they have to use a different - shorter - guide with the high lift cams. For this one the heads have to come apart and the guides will be machined by 2mm to give ample clearance for the extra 1.5m of lift.

So let this be an FYI for anyone thinking of using the 993 Supercup cams.

Richard
Old 08-17-2005, 09:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)