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Author Topic: How are valves rotated?  (Read 670 times)

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terry paget

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How are valves rotated?
« on: 14 September 2015, 08:20:47 »
People tell me that the poppet valves in modern internal combustion engines rotate during engine operation, and this largely removes the need for regular valve regrinding. I believe this, it fits my experience.

How is it achieved?
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Marks DTM Calib

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Re: How are valves rotated?
« Reply #1 on: 14 September 2015, 08:43:19 »
There not on modern engines actually, a technology of some 30 years ago.

Its all hardened seats, good fuel and well controlled fuel mix and ignition timing that saves the valves.
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