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Message: <blockquote data-quote="Herbert" data-source="post: 636821" data-attributes="member: 18029">The solutions discussed and offered by some other overseas forum are:-1) Perform tappet bleed-down procedure (typically does not provide a permanent fix). 2) Replace the tappets with an improved unit that bleeds down slower (sometimes cures the issue). 3) Replace the complete cylinder head with an improved unit that does not bleed oil pressure and flow as quickly and keeps more oil at the tappets when the engine is not running. This is of course the most expensive fix, but it is the final fix.</blockquote>