I don't know, but I have had a couple of broken pistons and with each one, oil was pumped out of every orifice I knew of and some I didn't. I would replace all of them. They are probably all the same age. If one goes, the rest may follow one at a time. Regards Richard, MCCC, NTCA CORSA 62 Spyder Conv 64 Rampside 69 Monza conv