1931 Pickup Engine Knock

[Garagekulture13]

I can't reach out to the engine builder because I don't know who he is. I have found previous owners on Facebook through my wife's account (I don't have one) and messaged them with no response.

#3 piston has like half moon cutouts on the body of the piston where the other 3 are flush around the base. This difference my purely be a difference in brand.

I did check to see if the dippers were hitting the pan when I dropped it and don't see any tell tell markings.

Just glancing up from the bottom it looks like the thrust spring is there but I will check more thoroughly later. I had to get my son off to school this morning.

However I did find a crack in the oil pump shaft housing. It appears the housing has already been welded previously.

This is just an update of what I have found and will continue to check things as advised. I really appreciate everyone's time and input on this.

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