My first oil leak (I think, I hope!) just started recently, originating from the lower edge of the left cylinder valve cover. I checked the bolts, which were not loose, but not tightened very well at the bottom. I torqued them down, but no cigar, the leak continued. Removal of the cover revealed the problem:
Close up of the culprit:
It appears that with the lower bolts not properly tightened, the gasket edge migrated away from the mating surfaces to the inside until a flow path was opened. So this leads to a few questions. If repositioning the gasket fails (which I anticipate), where is the quickest and/or cheapest place to get a replacement gasket, or would I be as well off to cut my own from stock gasket material? Also, I noticed all the hold down bolts were the same size except the top rear bolt, which is markedly shorter. Is this correct, or a Bubba mistake? Also one and only one steel washer dropped free from one of the bolt seats. Should all, some or none of these Allen head hold down bolts use washers? TIA for any and all enlightenment!