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----- Original Message ----- From: "Russ wolfe" <russella@prairieinet.net> > > > Well they were all lined up but I moved them round so they were 120deg > Piston rings rotate as the engine runs. That is what the 60 degree cross > hatch in the cylinder walls is for when you hone the cylinders. I space > the rings on a new assembly, but don't really worry about it. > One thing you do want to do, is make sure that the rings are free on the > pistons, with no carbon or varnish under them. So does this mean that they will all tend to end up with their gaps aligned due to this being the line of least resistance to the expanding compression gases? I blamed the engine builder but perhaps it was just natures course? I had always thought the cross-hatch was to promote controlled initial wear (bedding in) and a good ultimate seal whilst providing some oil trapping for lubrication? Mark Seaton '73 Fasty, London ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org