i have just started putting my engine back together and was bout to put barrel back on but on the barrel a metal ring do i need a gasket either side of this ring or do i just put gasket between ring and the block. or even still would it matter if i put one either side

alibabs wrote:i have just started putting my engine back together and was bout to put barrel back on but on the barrel a metal ring do i need a gasket either side of this ring or do i just put gasket between ring and the block. or even still would it matter if i put one either side

are you asking about the copper crush ring used on 1200CC 40 hp engine? paper gasket was obsoleted in mid 70's and was replaced by hi temp silicone. small bead on cylinder where it goes against spotface for spigot.
do you use a spacer ring to lower compression,then silicone goes on both sides of spacer. if you use a spacer/shim on head to cylinder/barrel then those are installed dry.