SUPPORT OUR SPONSOR

Go Back   Club Cobra > Club Cobra Tech Areas > Transmission Talk

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

MMG Superformance
Nevada Classics
MMG Superformance
Main Menu
Nevada Classics
Nevada Classics
MMG Superformance
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
MMG Superformance
MMG Superformance
Keith Craft Racing
November 2025
S M T W T F S
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30            

Kirkham Motorsports

Like Tree2Likes

 
 
LinkBack Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #15 (permalink)  
Old 01-22-2023, 03:47 PM
eschaider's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2006
Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,741
Not Ranked     
Default

You can also make your own tool to do the job.

Get a piece of 1 inch square steel bar stock (or a bit larger if 1" is not available) that is a little longer than the OD of the crank flange. If your crank uses ½" hardware drill two 9/16" holes at opposite ends of the steel bar that line up with the two flywheel attaching bolt holes.

Get two set screws from McMaster, or wherever you buy you tools, that will screw into the crank bolt holes and allow you to slip the pilot bearing in place and then 1 inch square steel bar over it. Put on hardened steel washers (McMaster) and a grade 8 nut (McMaster) on each set screw.

True up the bar stock so it is parallel to the back of the crank and flat against the throwout bearing and begin tightening the nuts one nut at a time, one quarter turn at a time untill the pilot bearing is pressed into the crank and seated at the bottom of its register in the back of the crank.

Presto, Viola! You are done. Don't forget to lube the crank register and the pilot bearing OD. As a general rule of thumb a 0.001" press fit is adequate, a 0.0015" press fit is tight. A 0.002" press fit wil require chilling the pilot bearing 10˚C to 20˚C below zero and heating the back of the crank to expand the register.

The heating and cooling approach to installation is not recommended with the crank in the block. The heat will damage the oil seal and you will have a leakage problem.

If the bearing is in fact 0.002" oversize, the right fix is to have a local machine shop take 0.001" off the OD. If it is not already chamfered, chamfer the leading edge of the pilot bearing to make centering and installation easier,and you will be good to go.
DanEC likes this.
__________________


Help them do what they would have done if they had known what they could do.
Reply With Quote
 



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 On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 06:24 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy