Cam bearing rant!!!
10-28-2007, 04:00 PM
#48
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Ok, finally getting around to putting these things in. Machine shop had them all installed with the holes at 6 o'clock, with the first one's two holes being ~2:30 and 6 o'clock.
Everything I have read, people are saying ALL KINDS of different thing about how to clock them.
Clevite has this to say:
So should I put them where there were, from the machine shop, or follow Clevites suggestions?
Everything I have read, people are saying ALL KINDS of different thing about how to clock them.
Clevite has this to say:
Originally Posted by Clevite
On blocks without grooves behind the cam bearings, care must be taken to insure that oil holes line up between the bearings and block. Where the block has a groove behind the bearing(which this block does), the bearing should be installed with the oil hole at the 2 o'clock position when viewed from the front for normal clockwise camshaft rotation. This will introduce oil into the clearance space outside of the loaded area and allow shaft rotation to build an oil film ahead of the load.
10-28-2007, 04:22 PM
#49
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Ah hell, I think I'll just go with what Clevite said. They have to know more about bearings than my engine builder does! 
And since NONE of the stuff I have read the pros saying is agreeing on what my builder did(6 o'clock), that is just more reason to go with Clevite.
It really seems to be a non-issue anyway, with no adverse effects....no matter HOW you clock them.
And since NONE of the stuff I have read the pros saying is agreeing on what my builder did(6 o'clock), that is just more reason to go with Clevite.
It really seems to be a non-issue anyway, with no adverse effects....no matter HOW you clock them.
Last edited by marshall93z; 10-28-2007 at 04:25 PM.
10-28-2007, 09:27 PM
#50
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Well, I got 'em all in there. Wasn't hard at all. Cam spins pretty freely, so I guess I didn't mess anything up TOO bad!
Although it did look like I saw some polished looking spots on the bearings after i took the cam out. And these are black(coated) bearings, so I don't know WHY they would be shiny. I'll look again tomorrow in better light.
Although it did look like I saw some polished looking spots on the bearings after i took the cam out. And these are black(coated) bearings, so I don't know WHY they would be shiny. I'll look again tomorrow in better light.
10-28-2007, 09:46 PM
#51
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Regarding the shiny spots you mentioned...
... If there is a tight spot you should see a shiny spot on the bearing after turning the cam over a few times. You can carefully remove it with a bearing scraper. Just be sure the high spot is not from any debris caught under the bearing shell or scoring in the bearing bore from you ham handed attempts to remove the prior bearings.
Rich
Rich
10-30-2007, 11:29 AM
#60
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I don't know about all cam bearing tools, but the one I used has the big collar that goes in the bore to center the shaft. You'd THINK that would allow you to get them in there straight!
http://www.amazon.com/ATD-Tools-Univ.../dp/B00061SIMU
http://www.amazon.com/ATD-Tools-Univ.../dp/B00061SIMU
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