It is common practice, once the piston
is set into the cylinder with the ring compressor installed
to tap on the top of the compressor to "square it up".
Usual procedure is to then use the hammer handle and tap the
piston home. The sketch below depicts this and points to areas
The inside area of the band becomes
rolled over, nicked, etc. and causes damage to the rings when
they are installed.
It is recommended after the piston
is set into the cylinder the piston be gently tapped with
hammer handle to square up the piston. The piston can then
be tapped or pushed into position in the cylinder.
It is also recommended that the inside
lower edge of the installing band be checked frequently for
nicks, dents and other damage by running a thumb and forefinger
completely around the band.
This practice will insure a better
performing engine when the job is done.