sand the outer diameter of another cam bearing to reduce the O.D , use it to try and drive the walked bearing out to the rear?

 

How important is it for you to save the cam?

I'd commit violence on that cam bearing from the inside (use a square-ended carbide burr to cut a groove in it, and then chisel it out), but I don't know how much that cam is worth, or if it's even still good.

I've been in a similar situation before, but on an iron block; I just use a prybar to separate the cam from the bearing.

 

My comment was based on a cost/benefit theory that he could get a more or less good to go junkyard motor for less cost than the labor associated with fixing whatever is wrong with this one.

 

I ended up buying the cheapest aftermarket cam bearings I could find,and turned down one of the position 1/5 bearings to make a slip fit. Tapped it out towards the back, then cut the bearing and opened it up to remove from the cam. Because the bearing wore in at an angle, a ridge formed on the running surface that would not allow me the pass it over the cam, hence the cutting/opening up. Fortunately, the cam journals are fine. I'm in the process of measuring the cam bearing bores and so far they're withing factory tolerances.

On a side note - the cam bearings in positions 2, 3, and 4 were all positioned too far back in the bore. They were all such that the oil feed hole was exactly covered by the bore halfway. I seriously doubt they all walked backwards the exact same amount, so I'm chalking all this up to improper installation by the machine shop the previous owner used. :/

 

Damn man, nice timing and good catch before some real bad **** happened. How could an installer not notice they covered up the feed holes? wtf.