[Shotimes] Valve cover seal update

[bjshov8]

Those holes don't look that big but they can swallow surprisingly large
items.  I found this out while doing my valve adjustment at 120k miles.  One
of the adjustment tools popped loose, clinked a couple of times, then was
nowhere to be found.  By process of elimination I decided it must have
fallen into the pan.  I pulled the pan off and found it laying in the bottom
of the pan.  It would probably have been harmless down there but I didn't
know that and I was also mad at myself for losing it.


> ALWAYS plug the oil drain back holes in the heads with paper towels before
> starting any work. It can be a real time saver!!!!
>  It's pretty amazing that everything seems to end up in the oil pan. Your
> not the first to find this neat feature!