Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

16v Cam Bearing Flange Mounting - Stress Cracks?

Thread Tools
 
Search this Thread
 
Old 03-31-2012, 07:58 PM
  #1  
BRB-83-911SC
Rennlist Member
Thread Starter
 
BRB-83-911SC's Avatar
 
Join Date: Jul 2005
Location: Woburn MA
Posts: 1,063
Received 86 Likes on 41 Posts
Default 16v Cam Bearing Flange Mounting - Stress Cracks?

I am in the process of replacing the cam seals and o-rings on my 84 Euro 16v. The cam bearing housings on the front of each cam tower appear to have what *look* like stress cracks (or casting flaws??). See pics below. Does this look harmless or should they be replaced? Thanks.
Attached Images   
Old 03-31-2012, 08:12 PM
  #2  
JET951
Drifting
 
JET951's Avatar
 
Join Date: Nov 2005
Location: Sydney Australia
Posts: 2,638
Received 83 Likes on 48 Posts
Default

They are raised casting marks( raised ) , they were there from new and quite normal
Old 03-31-2012, 08:24 PM
  #3  
RCinXS
Racer
 
RCinXS's Avatar
 
Join Date: May 2010
Location: Illinois
Posts: 393
Likes: 0
Received 1 Like on 1 Post
Default

+1
Old 04-01-2012, 01:52 AM
  #4  
Podguy
Three Wheelin'
 
Podguy's Avatar
 
Join Date: Sep 2003
Location: SF Bay Area
Posts: 1,526
Likes: 0
Received 0 Likes on 0 Posts
Default

looks normal to me. With a little polishing you can remove them.
Old 04-01-2012, 10:19 AM
  #5  
tilac999
Pro
 
tilac999's Avatar
 
Join Date: Aug 2010
Location: South Shore, MA
Posts: 736
Received 34 Likes on 16 Posts
Default

worrywart
Old 04-01-2012, 11:22 AM
  #6  
worf928
Addict
Rennlist Member
 
worf928's Avatar
 
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,329
Received 1,543 Likes on 1,007 Posts
Default

The radial marks around the circumference of the bearing are not raised casting marks.
Old 04-01-2012, 11:33 AM
  #7  
993turbo
Rennlist Member
 
993turbo's Avatar
 
Join Date: Jun 2004
Location: Puerto Banus - Marbella, Spain
Posts: 858
Received 26 Likes on 23 Posts
Default

Looks just like this on my 2 84 and 85 ROW 4,7 S as well.
Old 04-01-2012, 11:45 AM
  #8  
Ducman82
 
Ducman82's Avatar
 
Join Date: Nov 2009
Location: Marysville WA
Posts: 6,981
Received 18 Likes on 11 Posts
Default

looks like all the ones i have laying around.
Old 04-02-2012, 12:17 AM
  #9  
JET951
Drifting
 
JET951's Avatar
 
Join Date: Nov 2005
Location: Sydney Australia
Posts: 2,638
Received 83 Likes on 48 Posts
Default

Hi Dave C , yes they are raised casting marks , they are all like that & if you run you're finger over them ( these casting marks ) you can feel they are raised .
One could rub / polish these off , but there is no need to
Old 04-02-2012, 05:51 PM
  #10  
Podguy
Three Wheelin'
 
Podguy's Avatar
 
Join Date: Sep 2003
Location: SF Bay Area
Posts: 1,526
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by JET951
Hi Dave C , yes they are raised casting marks , they are all like that & if you run you're finger over them ( these casting marks ) you can feel they are raised .
One could rub / polish these off , but there is no need to
Dave,

Oh polish them off. You can not have too many polished parts on a 928 motor. Besides you will confuse the next guy.
Old 04-08-2012, 10:24 PM
  #11  
worf928
Addict
Rennlist Member
 
worf928's Avatar
 
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,329
Received 1,543 Likes on 1,007 Posts
Default

Originally Posted by JET951
Hi Dave C , yes they are raised casting marks , they are all like that & if you run you're finger over them ( these casting marks ) you can feel they are raised .
When I posted last week I was SOOO sure that I had felt-up those 'cracks.' But, this weekend, without gloves on, I felt'em-up again. And YES, they are casting flash not cracks.



Quick Reply: 16v Cam Bearing Flange Mounting - Stress Cracks?



All times are GMT -3. The time now is 02:43 AM.