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I would only replace my valve springs if I had to go in there for something else. If anyone's interested in details of the topic, I can explain more. Otherwise, I won't go into the boring stuff. Bottom line, the springs that were going to fail did so very soon after being placed into service. Some statistical outliers took longer, maybe a couple thousand miles.
There's no way in hell I would let someone touch my shit to replace perfectly good springs. They're battle tested. The statistical probability of a failure by this point is, well, damn near zero. That's just how springs behave with respect to fatigue failure when service conditions approach design limits.
I guarantee that seasoned engineers at Subaru/Fuji/Toyota collectively shook their heads in the decision to go forward with the recall, especially after their analysis followed exactly what we've learned to predict over the years.
I did.
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