4-28 ENGINE TOP END
Remove the piston by pushing its pin pull out the side that the snap
ring was removed. Use the piston pin puller assembly [A] if the pin
Special Tools - Piston Pin Puller Assembly: 57001–910
Remove the piston rings [A]. Carefully spread the ring opening with
your thumbs and then push up on the opposite side of the ring to
The oil ring rails have no "top" or "bottom".
Install the oil ring expander [A] in the bottom piston ring groove so
that the ends [B] but together, never overlap.
Install the oil ring steel rails, one above the expander and one below
Spread the rail with your thumbs, but only enough to ﬁt the rail over
Release the rail into the bottom piston ring groove.
With the marked side facing up, install the second ring [A] and top
ring [B] in that order.
If a new piston is used, check piston to cylinder clearance (see
Piston/Cylinder Clearance), and use new piston rings.
Install the piston so that the EX mark [A] on the piston toward exhaust