TM 5-3810-307-24-2-2
Install the pin.
the pistons do need to be at room temperature or above.
Install the second retaining ring.
Piston Ring Gap - Checking (1-31)
The top ring for a turbocharged engine is not the same as
the top ring for a naturally aspirated engine.
Position each ring in the cylinder and use a piston to
square it with the bore.
A = 89mm [3.5 in]