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Anyone know what this is? Looks like some kind of bearing I've found two while doing my head gaskets. One in the head where the valve springs are and one on the table where my removed parts are laying. Can't find anywhere it would fit and they were loose. Did they fall from something or could this be left behind junk from someone else's shotty work?
Yep, they are spacers to reduce the risk that the valve cover gaskets will get over-torqued and deform causing them to leak more. Although it's hard to imagine they would leak more!