Oil leak behind the cam

AJ/FormS said

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Hang on a sec; you see that bag of pipe plugs? Any chance they also are "extras",lol? You know that at least a couple of them belongs inside the engine, right?
And missing them will cause catastrophic engine failure.
And don't forget the tiny cup plug that goes up into the galley from the bottom of the engine to seperate the oil into two paths; the first is to the filter and the second takes filtered oil into the rest of the system. If not there, your oil will not get filtered. I can just barely see the cup plug in the bag..........
And there is another plug in the cavity behind the oil filter, don't forget that one,lol.

Click to expand...

If this makes any sense, I sent the block off to get honed, and the machine shop removed the cam and replaced the bearings. When I got it back, I replaced the core plugs one by one as I removed them. I think he removed the rear cam plug, and since I didn't remove it, I didn't think (or know) to replace it. All the other pipe pugs that were previously in the block seemed pretty sound, so I didn't mess with them, and that's how I ended up being okay with so many "extra" pipe plugs.

Now, regarding this tiny cup plug, I'll try to reference my service manual to make sure it's one I already left in place, but I don't think the machine shop would've removed it.