I wouldn't be worried about who made the blanks. Once a camshaft is ground, it is surfaced hardened with the Parkerization process. That is what makes, or breaks - a cam - along with how well the installation and break-in is done.
Back in the 70s, General Motors claimed that most of their cam-failures were caused by improper break-in at the factory, not a bad hardening process. True or not, who knows and who cares at this point. Back then, we usually repaired engines with replacement cams from Crane Comp., and few other aftermarket companies. I've never had, nor have I seen, a failure problem with any of the afermarket cams when done right.
But now adays? Can't say.
In regard to engine oil, even the automotive diesel oils have the ZDDP anti-cam-wear ingredients lowered for removed. Only the racing, tractor, or European oils still have it.
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Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
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