each rod and rod cap in each cylinder so they could be returned to their
respective cylinders.
Next, an arbor press was used to remove the wrist pin holding the
piston and rod together. The end of the rod (where it meets the cap) and
the top of the car cap (where it meets the rod) were each run against a
grinding stone to smooth off the ends where these parts meet. Removing
material collapses the circular opening formed by these parts where the
crank rides. Herman removed .001 to .002 inches from the end of the
rod and the rod cap, which will make the opening for the bearing
smaller, but also ensure each surface is flat. To compensate for making
this rod bearing opening smaller, he also honed the opening between the
rod and rod cap upon which the bearing rides, thus returning the size of
the area to the factory specification so the bearing will fit again. Once
measurements were taken of the opening, and this area between the rod
and rod cap measured at the original specification, bearings of original
specification were ready to be installed.
To install the new pistons on the engine’s original rods, a rod oven is
used to expand the rod end. The heat temporarily expands the opening
so a wrist pin can be inserted. Once the opening heats up enough to
allow the wrist pin to slide in, the part is inserted and allowed to cool,
thus locking the wrist pin in place.
singke
(singke)
#1