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Author Topic:   sbc cam bearing install problem
posted January 21, 2004 11:00 AM
First time cam bearing install.
Installed my Durabond cam bearings.
Then inserted the cam to make sure it fit correctly and there was no binding.
All checked out well. However some
of the cam bearing now have marks
from coming in contact with cam lobes.
There is no gouging or scratches, just
some black marks.

Should I chuck the bearings and start over,
this time protecting the cam lobes, or
will it be ok?

posted January 21, 2004 12:10 PM
I would think you should be ok. As long as they are not scratches or gouges i wouldnt worry about it. Had an engine builder tell me once when i had a cam that was tight in one bearing to oil it and keep turning it over until it loosened up. And it did. He said the bearings are pretty soft and will 'stretch' or wear to fit. Thats why you are seeing those marks. I dont think you could put a cam in without doing leaving those marks.

posted January 21, 2004 12:49 PM
If you installed that cam without oiling the bearing's, this would create your "black marks". I've seen this before. take some carb cleaner and wipe the black goo off, oil the cam and your should be good to go. Provided everything is fitting like you say it is.


Hendren Racing Engines
Rutherfordton , NC
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posted January 21, 2004 01:05 PM
I oiled the inside and outside of the bearings; I oiled the bearing bores/bosses
in the block; I oiled the cam bearing install tool. Actually I did not use oil but I used motor assembly lube. I'm a rookie at cam bearing installation. thanks for the responses guys.

posted January 22, 2004 09:06 AM
used the carb cleaner on all 5 cam bearings
and it cleaned them right up. thanks steve.

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