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Used pistons swap...B21F 200 1979

Head removal is mandatory, the piston comes out from the top. No reason to remove the crankshaft, just the pan and the rod cap. If there is much of a ridge, you might break a ring (or ring land on the piston) in the removal process. Solution is to remove the ridge with a ridge reamer. I have had decent luck breaking the cylinder glaze with emery paper as suggested earlier. New rings are not that expensive, especially if you can get them for one cylinder, and will probably mean the difference between success and failure of the project.

Good luck! And make sure ALL the emery dust gets cleaned out of there...

Chris






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