SBC spun cam bearing

Old 01-23-2011, 11:48 AM
  #1  
rusty40
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Oct 2008
Posts: 2
Default SBC spun cam bearing

I have a sbc 350 engine that is currently set up to run mid 12's it lost a little oil pressure the last time it was ran so we pulled it apart and found out that it has spun a cam bearing. My question is can this be fixed? the block has had a lot of machine work done to it and everything looks good except for the cam bearing problem.
rusty40 is offline  
Old 01-23-2011, 12:16 PM
  #2  
hink
Senior Member
EXPERT BUILDER
 
Join Date: Nov 2003
Location: NORTHEAST
Posts: 290
Default Re: SBC spun cam bearing

Originally Posted by rusty40
I have a sbc 350 engine that is currently set up to run mid 12's it lost a little oil pressure the last time it was ran so we pulled it apart and found out that it has spun a cam bearing. My question is can this be fixed? the block has had a lot of machine work done to it and everything looks good except for the cam bearing problem.
We have machined a lot of cam tunnels on OEM blocks because of misalignment issues spun cam barings ETC.

They offer over size cam bearings up to .040 over on the housing bore ID

Which cam bearings Clevite???????
hink is offline  
Old 01-23-2011, 01:15 PM
  #3  
fast75vega
Senior Member
RACING JUNKIE
 
Join Date: Nov 2008
Location: Niagara Falls, NY
Posts: 965
Default Re: SBC spun cam bearing

Originally Posted by rusty40
I have a sbc 350 engine that is currently set up to run mid 12's it lost a little oil pressure the last time it was ran so we pulled it apart and found out that it has spun a cam bearing. My question is can this be fixed? the block has had a lot of machine work done to it and everything looks good except for the cam bearing problem.
yes it can. which cam bearing spun?
fast75vega is offline  
Old 01-23-2011, 01:59 PM
  #4  
rusty40
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Oct 2008
Posts: 2
Default

I would have to look to make sure but I think it is the # 3 bearing and yes we were using Clevite bearings.
What bearings would you recomend to go back with?
rusty40 is offline  
Old 01-23-2011, 02:50 PM
  #5  
hink
Senior Member
EXPERT BUILDER
 
Join Date: Nov 2003
Location: NORTHEAST
Posts: 290
Default

Originally Posted by rusty40
I would have to look to make sure but I think it is the # 3 bearing and yes we were using Clevite bearings.
What bearings would you recomend to go back with?
Clevite performance cam bearings 1349 you should stay away from.

We keep the ACL .010 over bearing P/N 5C004AS-STD on the shelf we like them over the Babbit bearings, You can also go with the Durabond performance cam bearings as well.

Good luck
hink is offline  
Old 01-23-2011, 03:12 PM
  #6  
fast75vega
Senior Member
RACING JUNKIE
 
Join Date: Nov 2008
Location: Niagara Falls, NY
Posts: 965
Default

Originally Posted by hink
Originally Posted by rusty40
I would have to look to make sure but I think it is the # 3 bearing and yes we were using Clevite bearings.
What bearings would you recomend to go back with?
Clevite performance cam bearings 1349 you should stay away from.

We keep the ACL .010 over bearing P/N 5C004AS-STD on the shelf we like them over the Babbit bearings, You can also go with the Durabond performance cam bearings as well.

Good luck
2nd that :wink:
fast75vega is offline  
Old 01-24-2011, 12:42 PM
  #7  
oldandtired
Senior Member
RACING JUNKIE
 
oldandtired's Avatar
 
Join Date: Dec 2008
Location: Sugar Hill, GA
Posts: 1,370
Default

Since you have to pay for the set up and boring job, why not spring for the roller bearings?
oldandtired is offline  
Old 01-24-2011, 01:04 PM
  #8  
hink
Senior Member
EXPERT BUILDER
 
Join Date: Nov 2003
Location: NORTHEAST
Posts: 290
Default

Originally Posted by oldandtired
Since you have to pay for the set up and boring job, why not spring for the roller bearings?
Going the roller bearing with a 2.250 cam tunnel is really no gain as your using a STD. jouranl cam at that size and going to a 55MM roller cam bearing will most likely get you into the water jacket when reqrooving the oil grooves behind the cam bearings.

The more common size we do on the OEM blocks is go to the BBC cam tunnel which is .021 smaller then the 50MM cam journal and there is more power to be made with a babbit bearing over using roller cam bearings.
hink is offline  
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


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service