Kevlar Pilot Bushing issue
Thread Starter
Instructor
Joined: Aug 2005
Posts: 166
Likes: 0
From: Tours, France
Kevlar Pilot Bushing issue
Seems the center hole is too narrow 
Clutch alignment tool was hard to install and it didn't slide after centering the clutch so I have to put everything apart again.
I'm afraid I won't be able to reinstall the trans as the diameter shaft is about the same as the tool...
Can I use my dremel to slightly enlarge that hole or should I get a new bronze pilot bushing ?
Here's the part I ordered : http://store.summitracing.com/partde...B&autoview=sku
Clutch alignment tool was hard to install and it didn't slide after centering the clutch so I have to put everything apart again.
I'm afraid I won't be able to reinstall the trans as the diameter shaft is about the same as the tool...
Can I use my dremel to slightly enlarge that hole or should I get a new bronze pilot bushing ?
Here's the part I ordered : http://store.summitracing.com/partde...B&autoview=sku
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Seems the center hole is too narrow
Clutch alignment tool was hard to install and it didn't slide after centering the clutch so I have to put everything apart again.
I'm afraid I won't be able to reinstall the trans as the diameter shaft is about the same as the tool...
Can I use my dremel to slightly enlarge that hole or should I get a new bronze pilot bushing ?
Here's the part I ordered : http://store.summitracing.com/partde...B&autoview=sku
Clutch alignment tool was hard to install and it didn't slide after centering the clutch so I have to put everything apart again.
I'm afraid I won't be able to reinstall the trans as the diameter shaft is about the same as the tool...
Can I use my dremel to slightly enlarge that hole or should I get a new bronze pilot bushing ?
Here's the part I ordered : http://store.summitracing.com/partde...B&autoview=sku
It should NOT bind on the pilot shaft at all - should slide on easy and spin freely. Doesn't sound like the correct one for your shaft.
Pro
Joined: Jun 2002
Posts: 538
Likes: 7
From: Johnsonville Wi
Did the Kevlar bushing slip over the trans snout before installing it in the crank?
If so, then the outside diameter was too big and the bushing compressed when installed. It will probably be difficult to remove without damage to the bushing, but at the cost of bushings theese days, worth the try.
I just took some quick measurements of an old Muncie snout and a new GM bronze bushing:
Snout - .588" (14.94mm)
Bush - .592" (15.04mm) inside diameter
Bush - 1.094" (27.79mm) outside diameter
If you can get it out without damage perhaps a maching shop could run a 15mm reamer through it. If the outside diameter is too large, it could be turned smaller in a lathe.
Good luck,
Daffy
If so, then the outside diameter was too big and the bushing compressed when installed. It will probably be difficult to remove without damage to the bushing, but at the cost of bushings theese days, worth the try.
I just took some quick measurements of an old Muncie snout and a new GM bronze bushing:
Snout - .588" (14.94mm)
Bush - .592" (15.04mm) inside diameter
Bush - 1.094" (27.79mm) outside diameter
If you can get it out without damage perhaps a maching shop could run a 15mm reamer through it. If the outside diameter is too large, it could be turned smaller in a lathe.
Good luck,
Daffy
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
But make sure you dont drive the bearing in too far...on some of the cranks inside is a lip and when you go in and over the lip the ID of the bushing becomes smaller.I always leave the bushing out about 1/4"
The depth of the cavity should be about .800 because thats usually how long the bushing is but I have been running into cranks that are only .650 deep.
Thread Starter
Instructor
Joined: Aug 2005
Posts: 166
Likes: 0
From: Tours, France
Thanks guys 
I made a newbie mistake by not test fitting on the trans snout before installing
Maybe I've driven it too far.
Those damn instructions said to install it flush and glue the outside with strong anti-seize sealant !
I'm wondering if the dowel/grease method will work on this one
Forgot to mention I'm using a Scat crank.
I made a newbie mistake by not test fitting on the trans snout before installing
Maybe I've driven it too far.
Those damn instructions said to install it flush and glue the outside with strong anti-seize sealant !
I'm wondering if the dowel/grease method will work on this one
Forgot to mention I'm using a Scat crank.
Last edited by Le shark81; Aug 15, 2008 at 05:21 AM.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
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Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Thanks guys
I made a newbie mistake by not test fitting on the trans snout before installing
Maybe I've driven it too far.
Those damn instructions said to install it flush and glue the outside with strong anti-seize sealant !
I'm wondering if the dowel/grease method will work on this one
Forgot to mention I'm using a Scat crank.
I made a newbie mistake by not test fitting on the trans snout before installing
Maybe I've driven it too far.
Those damn instructions said to install it flush and glue the outside with strong anti-seize sealant !
I'm wondering if the dowel/grease method will work on this one
Forgot to mention I'm using a Scat crank.
