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Post a question would be better. I've never torn down an engine, not a mechanic. :)
So stupid me, I just figured out last oil change I grabbed the wrong gallon of oil from my storage and ended using my gen 3 oil by mistake on my gen 2 (0w20) so I did the oil change again with the 5w30 and problem solved noise gone hopefully no damage was done, wrong oil was only 1 month in the engine.
There's been a few 2nd gen owners that switched to 0W20. I think you're being prudent though; I've been tempted to switch to something like 5W20 off-and-on. But Toyota 0W20 all I've every put in, it's had zero consumption between changes so far, so I better not jinx it lol.
That’s the Yaris engine . It can be dealt with but more folks than not are going to want to remove the engine assy to do it. So I’d look at a JDM low mileage take out . They still make this engine today. Plentiful in JDM trim they’re also a very high HP output engine for the rally car etc. good luck