Get the New grouphead gasket.

Make sure it is a Rancilio Brand gasket. if it is an imitation it may not be exactly the right size. This could cause many problems.

Next with the lettering down insert the gasket into the grouphead. We use a 3/16" punch to gently push the gasket into place. Make sure the gasket is level on the entire surface.

If you have difficulty getting the gasket in or getting it level you may need to do a deeper cleaning of the grouphead.

if you have version 3 insert the brass disk you scrubbed earlier.