Go Back   FerrariChat.com > Model Specific Discussions > 308/328

Reply
 
Share/Bookmark LinkBack Thread Tools
  #1  
Old 07-28-2013, 12:30 PM
akimmel's Avatar
Karting
Silver Subscribed
 
Join Date: Aug 2009
Location: Dallas, TX
Full Name: Art Kimmel
Posts: 170
Pilot bearing help

Another dumb move on my part.
I failed to measure the depth of the seat on the end of the crank for the pilot bearing. It's been years since I pulled all of this apart and I am wondering if it is proper for the bearing to not seat flush to the surface of the crank. It's about 0.140" out and I am reluctant to whale on it any harder than I already have. Pulling it probably means another new bearing so I thought I would ask if anyone in our forum knows.
Thanks for any help! Picture attached.
Art
Attached Images
File Type: jpg DSC02829.JPG (49.2 KB, 85 views)
Reply With Quote
Non-Sponsor Ads
  #2  
Old 07-28-2013, 12:37 PM
Steve Magnusson's Avatar
F1 World Champ
Lifetime Rossa
 
Join Date: Jan 2001
Location: Texas
Full Name: Steve Magnusson
Posts: 14,747
See the cross-section drawing on page D6 in the 308GT4 WSM -- some protrusion is present to center the flywheel (and there's some nominal clearance on the far side to the shoulder on the splined shaft). The ID hole in your flywheel may show some witness/rust marking from the old bearing being there -- if you account for the radius on the bearing outer race corner, it might give you an idea of the prior ballpark protrusion.
Reply With Quote
  #3  
Old 07-28-2013, 01:10 PM
akimmel's Avatar
Karting
Silver Subscribed
 
Join Date: Aug 2009
Location: Dallas, TX
Full Name: Art Kimmel
Posts: 170
Thanks Steve!

The drawing makes me feel better about the protrusion. It's probably a good assumption that the drawing is somewhat to scale. The 0.14" that I measure is about 1/3 of the 0.4" measured flywheel thickness in that area. I'll leave the bearing for now and try to verify spline clearance when I attach the bell housing.
Reply With Quote
  #4  
Old 07-28-2013, 02:38 PM
smg2's Avatar
F1 Veteran
Sponsor
 
Join Date: Apr 2004
Location: Newport Beach
Full Name: SMG
Posts: 5,659
Quote:
Originally Posted by Steve Magnusson View Post
See the cross-section drawing on page D6 in the 308GT4 WSM -- some protrusion is present to center the flywheel (and there's some nominal clearance on the far side to the shoulder on the splined shaft). The ID hole in your flywheel may show some witness/rust marking from the old bearing being there -- if you account for the radius on the bearing outer race corner, it might give you an idea of the prior ballpark protrusion.
Steve's right, the outer race is used as a concentric center for the flywheel. typical protrusion is ~0.150"
__________________
If you want to make people angry, lie. If you want to make them absolutely livid with rage, tell them the truth. The second law of Murphy
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 03:30 AM.


FerrariChat.com has no association with Ferrari S.p.A.
vB Ad Management by =RedTyger=

ShowCase vBulletin Plugins by Drive Thru Online, Inc.