I've also heard rumors that there are a not insignificant percentage of vehicles returning with issues after the valve spring repair. So it's possible that the techs are doing something wrong, or weren't trained on an extra step, or just that something is going wrong during the repair in general that nobody foresaw. Maybe they didn't explicitly spell out "DON'T LET OLD GOOP FALL INTO ENGINE," in the instructions. Who knows, but someone at one dealership in one of our FB groups said they were actually completely stopping doing the repairs until they got more guidance from Subaru/Toyota due to 10% of the repaired vehicles being brought back with further issues.
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