Hi all, So my frothy coolant/head gasket change has revealed a cracked piston, so I've decided whilst all the top and sump are off, to replace all four, the bores all look in pretty good condition so it shouldn't be to much of a drama, thing is the pistons all have 020 stamped on them. Does this mean I need to buy the 020/20thou pistons to replace them with?
Thanks in advance
Smudge