It does look as if the crank journal in question above does have some debris embedded into its surface. Looks like it and the bearing (#3 thrust) took the brunt of the whatever came through the oiling system. Two pieces of metal came into the journal/bearing, one embedded itself into the bearing nicely and the other embedded as well into the bearing but broke apart and lodged into the journal as many small pieces. The dental pick does ever so lightly catch the spots you see in the picture above.The Dark Side of Will wrote: Do you have a better photo of the journal above? That's the only one that looks concerning, but that could just be the photo.
Other than the embedded debris, the main bearings look beautiful. If a dental pick won't catch on the journals, then you should be good, as long as your clearances spec out.
If you're going to pull the crank out, you probably want to hit any questionable areas with 2000 grit paper. Obviously clean it fastidiously prior to reassembly.
That score on the rod bearing is concerning too... how does the journal look? Also, the rod bearings are considerably more worn than the mains.
the rod bearing above(#4 rod) does have a nice groove , oddly enough however, I cannot see any rod journal damage or fragments embedded into either to create the groove. Might have been pinned between the oil feed hole and the bearing momentarily, while under load, before working its way out... will inspect more once the crank comes out, keep forgetting to get to the auto parts store for some properly sized hose to cover the rod studs..
I assume that to pull the IMS, the dorked up distributer O-ringed shaft must be removed, and prior to that the associated head must come off as well, correct? well at least I'll get to replace the o-ring with the proper long lasting type..
