Since I'm still waiting for someone to buy one of my motorcycles and thereby provide the cash required for my rebuilt engine, I'm puttering around with all the old parts and trying to sleuth out the cause of the failure in the meantime. Press "delete" now to avoid boredom. If someone has a fiche for the type IV <Joel?> or a parts book, maybe you could help here: The part # of the cam bearing that _didn't_ disentigrate is 021 101 521. The part numbers of the bearings that _did_ fall apart are 113 101 511 and 113 101 522. Since most type IV parts have an 021 prefix and the 113 prefix is generally found on type I <upright fan> engines, I have become suspicious that the bearings may have failed simply because they are the wrong parts. "How to Rebuild Your Air-cooled VW Engine" states that the type I and IV parts look the same but are NOT interchangeable. I'd like to understand this failure so that I can prevent the same thing from happening in the future. It's a real heartbreak to dis-assemble an engine which clearly had a lot of life left in it <the cross-hatch hone marks are still visible on the cylinder walls> to find a problem caused by what may have been poor attention to details <looks right, who cares about the part number>. Thanks, Dave
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