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Old 04-01-2004, 12:11 PM
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Cam tight to turn by hand?

Putting my 454 together and everything has been going good until I get the cam installed. I lubed everything with the supplied comp cams lube as well as used a mixture of oil and stp treatment on the bearings and journals. Cam is very hard to get started turning but once I get it started it is smooth. If I stop it is hard to start turning again. Any Ideas why this maybe. A lot of lube possibly causing it to stick?

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Wade
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Old 04-01-2004, 12:14 PM
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Probably have a tight spot on a cam bearing. A common problem.
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Old 04-01-2004, 12:24 PM
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Thanks. Just curious did you reply to my post at the Club Hot Rod forum suggesting scotch brite on the bearing? If not sorry. If so I did follow your suggestion and it did help although scares the heck out of me to be abrasive material on a bearing surface. As I stated in the post it is still a little tight but the bearing did mic to same spec as the others and does seem to be square in the hole. This might be a really dumb question but since it is turning smoother can this be tolerated and allowed to wear itself in or is it something that I am asking for trouble with?

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Wade
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Old 04-01-2004, 12:34 PM
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Usually it causes no problems. I try not to use scotchbrite on bearings, I use a bearing knife. If I have a real super fussy customer I will use fine scotchbrite pad to "Hollywood" the bearing. Usually what happens is the bearing driver leaves a very small amount of bearing displaced at the very edge. A knife leaves the removed spot shiny while the rest of the bearing is dull.
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Old 04-01-2004, 07:56 PM
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Another thought is that the cam bearing bores may be slightly out of line. This can make the cam turn stiff, but isn't really a problem.
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