While under the car yesterday I noticed both valve covers were leaking oil. Not wanting to open the top of the engine I looked closely at the valve cover bolts and noticed that oil was seeping out from under them. When I shut the car off I could see a little bubble of oil oozing out from underneath one of them by the main leak trail. I went to tighten it and it was barely finger tight. So, one at a time I removed each valve cover bolt, wiped it off, applied a bit of sealer on the thread and tightened them down. Hopefully that will stop the leak(s).
As you can see, the wire retainer brackets were on the engines when they were painted:
And the unique SD455 valve cover warning label:
The SD455-only oil filler cap with the PCV within it. The PCV's on the SD455s were relocated to a valve cover oil cap from the intake manifold due to the increased internal pressures in the intake valley where the regular engines have them mounted.
The stenciled hose for the PCV filler cap.
