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Originally Posted by Paul
Interesting discussion. In most applications a collapsed hydraulic lifter makes enough noise that's it's impossible not to notice it. I'm puzzled when I read that 20 could fail without making a lot of loud rattling noises.
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I was thinking about this. If you take any Boxster that I have owned and sit it next to say, any Lexus. Then, listen to the cars as they idle. To my ear, the Box engine will alway sound like you can hear the lifters clacking away. The Lexus sounds like an electric motor mostly, whisper quiet.
It COULD be that this clacking noise is the result of bad lifters in most cases.
Just a thought?
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