I've put together most of my engine and I went to check the oil nozzles before installing them...

DOH, they all let air flow backwards. Maybe that's why my housings were so torn up... wish I had checked these properly *before* it was almost the weekend.

Some of them are pretty obvious, whereas some don't make any noise but won't hold a vacuum.

New ones are ~$100 with a discount.

Anybody have some good used ones? Ideally within 200 miles or of Mobile, AL so I can come pick them up. I've got them soaking in diesel fuel right now but I don't think that's going to help the check valves any (they already flow oil fairly well in the normal direction), and I think using compressed air on them might have made them worse.

It's a good thing I checked...