I'm completely rebuilding a '81 911sc engine. First time, so I'm very, very new to all of this. In the process, I decided to go with 964 cams. I purchased these camshafts that were originally from a 3.2 and reground to 964.
When I received them, I noticed there was a very light orangish film (rust maybe?), that I was able to polish off with some ultrafine scotch-brite. However, there still appears to be some 'blackish' spotting? It's not really rough to the touch - so not sure if I should be concerned about that, or if that's normal?
Another concern is a scratch on one of the journals, it's deep enough where you can catch it with your fingernail.
Anyways, attached is a couple pictures. One with some of the lobes where you can see before/after using scotch brite and the 'blackish' spotting. The other showing the scratch I mentioned.
The seller is a good guy and said he could replace them if I'm not happy - but I want to make sure I'm not just being overly paranoid... Especially since I'm very new to knowing what a good vs. bad cam should look like... Any thoughts would be much appreciated!
