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05-02-2014, 10:01 AM
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Valves Tapping
My '09 Yaris has 114k miles on it and the valves seem to be gotten louder over the last 10k or so miles. I did 86 the stupid cover years ago so its not that. I did just recently put in a lighter steel flywheel when I replaced the clutch. It does sound fine when driving and no lights are on. I'm just a tad worried about the knocking during idle, especially on cold start up. And I've been running Royal Purple Synthetic since I got the car 2 1/2 years and 68k miles ago.
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