Tweet
Greetings!
I have new rings to install in acceptable bores (3 ring sets for the 3 cylinders, each set has a top or compression ring, and a lower ring, which I am not sure what it does or is called). To measure the ring gaps, I inserted the COMPRESSION ring into each bore, concentric and centered by pushing in with a loose piston, and take the gap at the top, 1" down and 2 1/2" down into the bore (the stroke is about 2 1/2"). I then read a compression ring end gap for all 3 cylinders that stays within tolerance (above) from top to bottom of the bore. When I repeat this reading using the LOWER ring, the gap is excessive from top to bottom, all 3 new LOWER rings, for all 3 cylinders.
It appears that the lower piston ring is supposed to have a larger gap than the compression ring, by about 0.005". OR.... do I have the incorrect lower rings?
I have new rings to install in acceptable bores (3 ring sets for the 3 cylinders, each set has a top or compression ring, and a lower ring, which I am not sure what it does or is called). To measure the ring gaps, I inserted the COMPRESSION ring into each bore, concentric and centered by pushing in with a loose piston, and take the gap at the top, 1" down and 2 1/2" down into the bore (the stroke is about 2 1/2"). I then read a compression ring end gap for all 3 cylinders that stays within tolerance (above) from top to bottom of the bore. When I repeat this reading using the LOWER ring, the gap is excessive from top to bottom, all 3 new LOWER rings, for all 3 cylinders.
It appears that the lower piston ring is supposed to have a larger gap than the compression ring, by about 0.005". OR.... do I have the incorrect lower rings?