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Cam bearing shot after break in

Posted By Andy 7 days ago
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Andy
Posted 7 days ago
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Ok first for me on a new set of cam bearings wiped out after break in. This is a stock rebuild and awesome oil pressure. Ran about 15 minutes after a hot valve adjustment then started missing after a stuck exhaust valve due to oil loss to top end . The bearings were dura bond and look like the Babbitt just came loose. Really weird with stock valve springs.
PF Arcand
Posted 7 days ago
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Andy: that's a tough one..so go to the subject "New cam won't fit into the block" on the "same page" your post is on.. There's an in depth post on cam bearings, lubrication etc.  Good luck


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Whenever I see the cam bearing material delaminating, oil starvation at the cam journal does come to mind.
 
How many cam bearings failed? Did the camshaft turn freely when installed?  Oil holes properly aligned in their respective holes?  What rpm was the engine run at during the initial break in period?  Was the engine pre-lubed before starting?
 
Here’s the link to last weeks’ discussion regarding installing camshafts and related problems.  It’s several pages long but a lot of pertinent information can be found there.
http://forums.y-blocksforever.com/FindPost155092.aspx


Lorena, Texas (South of Waco)




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