HOME and how to join Forum Open Area General Scott topics Tight spot after new rings fitted Re: Re: Tight spot after new rings fitted

#11020
scott596
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Jonathon, the trouble is that the top edge of the old rings will have developed a radiused corner and this will match a radiused wear ridge in the bore, replacing the top ring with something with a sharp 90 degree edge will cause the piston to tighten up at the top of the stroke and could cause damage to the top groove of the piston or excessive wear to the gudgeon pin bosses, the choices are, put your old rings back in, grind a bevel on your new top ring, or turn your top ring groove to a lower position fit your new ring and then find a thin undersize spacer ring to fit the gap above the ring. Alan Noakes.