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Registered
Join Date: Dec 2005
Location: Palo Alto, CA
Posts: 203
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Pilot bearing with fat flange
Has anyone else seen this. I ordered a new pilot bearing for an early 911 flywheel. When it arrived I pressed it in the flywheel and found it was not flush with the surface. I pressed it out and measured both the flywheel and the pilot bearing. The recess in the flywheel is 2.0mm. The old pilot bearing has a flange that is 1.8mm wide. The new pilot bearing has a flange that is 2.5mm wide and hence sticks up by about 0.5mm after being pressed in. I asked the supplier to send another one, and this one has a flange that is 2.1mm wide.
Has anyone else seen this? I assume that it is not OK to install the flywheel if the bearing protrudes beyond the surface of the flywheel at all. Right? I'm tempted to just grind a few tenths of a mm off the new pilot bearing and install it. Does anyone see a problem with this approach? Here's a photo of the old and new pilot bearings. 
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01-31-2007, 05:19 PM
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Registered
Join Date: Apr 2003
Location: Terre Haute, IN
Posts: 2,949
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Maybe a tranny/clutch area isn't a bad idea...little/thin feedback on clutch questions seems to be a trend. And due to the fast turn over in general tech they get burried quickly.
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Luke S. 72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v8,03 900 rwhp 996TT |
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02-06-2007, 07:05 PM
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