Harley Davidson Forums

Loading


Hello

Guest

Welcome to the harley davidson forum. Join our discussion today for FREE!

CREATE ACCOUNT

Membership Benefits

Get your questions answered by harley davidson community gurus and industry experts. Exchange your experience with another members. Access full features forum. Get a members discounts for your harley parts & accessories.

Cam Bearing Failure?

Touring Models

Reply
 
Thread Tools Display Modes
Old Jan 30th, 2011, 12:37 PM     #1
Play The Throttle
Ride: 1973 schwinn
 
Join Date: Jul 20th, 2008
Location: northpole
Posts: 215
My Mood: My Mood
flh canuck is an unknown quantity at this point
Cam Bearing Failure?

Just a question regarding inner camshaft bearings on the Twincam engine.

I have seen a lot of posts suggesting replacement of the inner cam bearings with stronger B-168 torrington bearings when swapping out cams.

I have never heard of a stock cam bearing failure in one of these engines so am I missing something here or are people simply replacing these bearings out of an abundance of caution?
flh canuck is offline   Reply With Quote
Old Jan 30th, 2011, 12:39 PM     #2
Contributor
Ride: 2007 Streetbob
 
Jack Klarich's Avatar
 
Join Date: Sep 25th, 2009
Location: Jacksonville, Florida
Posts: 16,578
My Mood: My Mood
Jack Klarich has a spectacular aura aboutJack Klarich has a spectacular aura about
Re: Cam Bearing Failure?

Quote: Originally Posted by flh canuck View Post
Just a question regarding inner camshaft bearings on the Twincam engine.

I have seen a lot of posts suggesting replacement of the inner cam bearings with stronger B-168 torrington bearings when swapping out cams.

I have never heard of a stock cam bearing failure in one of these engines so am I missing something here or are people simply replacing these bearings out of an abundance of caution?
Early Twin Cam Bearing Problem Identification - Harley Davidson Community (Early Twin Cam Bearing Problem Identification) here is a good read on early TC failures, The MOCO has gone cheap on some bearings in the past
__________________
CAPITAL JACK( Nuff Said, We're Burnin Daylight, Let's Ride)
Jack Klarich is offline   Reply With Quote
Old Jan 30th, 2011, 05:44 PM     #3
Community Star
Ride: 2003 ultra classic
 
marcus22's Avatar
 
Join Date: Apr 27th, 2009
Location: st. cloud MN
Posts: 431
marcus22 is an unknown quantity at this point
Re: Cam Bearing Failure?

Quote: Originally Posted by flh canuck View Post
Just a question regarding inner camshaft bearings on the Twincam engine.

I have seen a lot of posts suggesting replacement of the inner cam bearings with stronger B-168 torrington bearings when swapping out cams.

I have never heard of a stock cam bearing failure in one of these engines so am I missing something here or are people simply replacing these bearings out of an abundance of caution?
I agree. I have read Early Twin Cam Bearing Problem Identification - Harley Davidson Community and still hear about people with tc motors that do not fall into the bad years of the berrings and still replace them.
marcus22 is offline   Reply With Quote
Old Jan 30th, 2011, 06:17 PM     #4
Community Star
Ride: 1999 Ultra Classic
 
The4opps1's Avatar
 
Join Date: Aug 12th, 2008
Location: New Jersey
Posts: 636
My Mood: My Mood
The4opps1 is an unknown quantity at this point
Re: Cam Bearing Failure?

I agree with the two previous posts. If you see the physical difference between the two bearings you can begin to understand why the MOCO changed. For me, it wasn't a decision that I had to ponder for any length of time. When I did my tensioner upgrade, I did the inner bearings too. My thoughts were not so much the likelyhood of a failure, but the damage that would result if such a failure occurred....
The4opps1 is offline   Reply With Quote
Old Jan 30th, 2011, 06:34 PM     #5
Community Guru Wannabe
Ride: 2012 Road Glide Ultra
 
TripleJ's Avatar
 
Join Date: Oct 4th, 2009
Location: Frisco, TX
Posts: 1,093
My Mood: My Mood
TripleJ is on a distinguished road
Re: Cam Bearing Failure?

Quote: Originally Posted by The4opps1 View Post
I agree with the two previous posts. If you see the physical difference between the two bearings you can begin to understand why the MOCO changed. For me, it wasn't a decision that I had to ponder for any length of time. When I did my tensioner upgrade, I did the inner bearings too. My thoughts were not so much the likelyhood of a failure, but the damage that would result if such a failure occurred....
That pretty much sums up why I replaced mine while changing the cams.
TripleJ is offline   Reply With Quote
Old Jan 30th, 2011, 06:47 PM     #6
Start The Engine
Ride: 2007 street glide
 
Join Date: Apr 10th, 2008
Posts: 35
dboone is an unknown quantity at this point
Re: Cam Bearing Failure?

I have seen the results of cam bearing failure. I disassembled the motor on a 2000 FLH that the bearing failed. The rollers on the front bearing came out of the cage and ended up on the crankcase. The bearing spun and and ruined the bearing bore. It totally ruined an engine with 30 k on it. My friend ended up buying a surplus used engine that we went thru and upgraded the bearings before we installed it.
__________________
07 Streetglide
dboone is offline   Reply With Quote
Old Jan 30th, 2011, 07:11 PM     #7
Moderators
Ride: '11 FLSTC (Heritage Softail Classic)
 
TQuentin1's Avatar
 
Join Date: Apr 4th, 2008
Location: Summerwood in Humble, TX
Posts: 4,308
TQuentin1 is on a distinguished road
Re: Cam Bearing Failure?

I believe the question is about the inner roller bearings not the support bearings in the plate. Here are a few - see here:

Ultra Classic inner cam shaft bearing - Harley Davidson Community (Ultra Classic inner cam shaft bearing)

cam needle bearing failure - Harley Davidson Community (cam needle bearing failure)

2004 Ultra Cam Bearing failure - Page 2 - Harley Davidson Community (2004 Ultra Cam Bearing failure)

TQ
__________________

Please stop by the "The Self-Help pages."
>>Self-Help Information and Tips - Harley Davidson Community Self-Help Threads Information<< click me!
TQuentin1 is offline   Reply With Quote
Old Jan 30th, 2011, 11:10 PM     #8
Play The Throttle
Ride: 1999 Ultra Classic
 
wannaride's Avatar
 
Join Date: Dec 22nd, 2010
Location: Falcon, Co
Posts: 262
My Mood: My Mood
wannaride is an unknown quantity at this point
Re: Cam Bearing Failure?

I went with the Timken bearings, mine still had the INA's & what a difference in the needle size. The stock INA needles were about half the length of the Timkens. I also had 50,000 miles on it before I changed them & they were still in good shape. Wish I could find the pics that I took.

Toby
__________________
1999 Ultra Classic W/95 CI
wannaride is offline   Reply With Quote
Old Jan 31st, 2011, 10:14 AM     #9
Community Star
Ride: 2003 ultra classic
 
marcus22's Avatar
 
Join Date: Apr 27th, 2009
Location: st. cloud MN
Posts: 431
marcus22 is an unknown quantity at this point
Re: Cam Bearing Failure?

Thanks TQ. that answered my question
marcus22 is offline   Reply With Quote
Old Jan 31st, 2011, 02:16 PM     #10
Play The Throttle
Ride: 2008 Streetglide
 
Join Date: Oct 8th, 2008
Location: Alberta, Canada
Posts: 337
My Mood: My Mood
CalgaryBikeBum is an unknown quantity at this point
Re: Cam Bearing Failure?

I changed mine when I did the 95" conversion and I changed them again when I did the 104" conversion. I figured they weren't much money, I have the right tools for changing them easily and its's cheap insurance as I was in there anyways changing the cams for the upgrade. My two cents.
CalgaryBikeBum is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
cam needle bearing failure Mike Tracy Dyna Models 20 Sep 14th, 2014 04:39 PM
abs failure johnkarlfl General Harley Davidson Topic 20 Dec 19th, 2010 06:39 PM
Cam Bearing Failure, Not Tensioners big_ern_77 Softail Models 9 Aug 19th, 2010 04:15 PM
2004 Ultra Cam Bearing failure 4Bus Touring Models 13 Sep 23rd, 2008 05:50 PM
Primary bearing failure 2006 Dyna Isoteric Classic Dyna Models 5 Aug 20th, 2008 03:59 AM