[A26B]

Originally Posted by Dynomite

WEW......Thanks Jerry......was about to start tear downs of five or six LT5s to investigate the issues

It appears this was then a problem in the design of the first few LT5s that has long been corrected.
It also appears that such failure was not a locking of the camshaft between the cam covers and head but just a lot of initial wear of aluminum in the cam cover and head where the cam shaft was in contact. Or was this something more catastrophic????

I have noticed that on all the cam covers I have removed that some cam cover journals on the same cam cover have greater wear than others.

I have also noticed that the cam cover journal wear in general is the same on ALL cam covers no matter how many miles on the LT5.

This indicates some intolerance from the get go in the design of the cams/cam journals which seems to correct itself (quickly) by the wear indicated. In other words, once worn in the wear stops and the cams find themselves in a comfort zone for thousands (100,000 or more miles).

I am assuming that ALL the LT5s that came off assembly line with this initial Cam Journal intolerance were corrected in a call back??

And....what is the Cold Start Procedure??

About the wear pattern in the cam cover/cylinder head journal bores & similarity in different engines.
Think about the forces on the camshaft along the length of the cam. I think you will come to understand the wear pattern & why it is the same in other engines.