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I had nearly the identical failure. The engine needs to be removed, the case split, and the IMS shaft ($500 on Ebay if you can find them, which is rare) and bearing replaced, along with lots of other ancillary parts. Make sure to get the right IMS if you go that way. Additionally the case halves need to be ultrasonically cleaned, and the heads, might as well rebuild those, the chain tensioners likely have glitter in them, the chain tensioners have filings driven into the plastic, etc., etc.
So you're looking at about $2000 to $2500 in new parts without rings, or lifters and a boatload of work because for those dollars you're doing it all yourself. The engine really is a boat anchor at this point if you're going electric anyway. Putting time and money into the electric conversion seems like a reasonable path instead of chasing a nearly irrevocably dead engine. Sorry to see that, but it may serve to bring the electric conversion project into focus. best of luck!
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2003 S manual
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