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How on earth do you 'measure' this impossible one?
We clarify TKM rule C3.4.28 concerning piston rings as follows with new detail highlighted:
C3.4.28 Piston rings must at all times remain predominately free (50% or more) to operate in the manner in which they were designed and supplied. It is the responsibility of the driver to ensure that the rings are not �coked� in place with carbon or prevented from their normal �spring� effect by other methods. The rings must be appropriate to the piston size used and have a maximum ring gap of 0.5mm when measured with the ring placed squarely 5-10mm down from the top of the cylinder bore.
Sticky rings behave differently when hot or cold, so would they attempt to 'measure' at a certain temperature?
Just curious, nothing sinister.
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