Disassemble Procedure

Courtesy of GENERAL MOTORS COMPANY

CAUTION:
You must use a piston ring expander to remove and install the piston rings. Only expand the rings far enough to fit over the piston lands. If the rings are overexpanded, the top ring will shatter and the others will distort.

Remove the piston rings (1, 2, 3, and 4) using a piston ring expander. Place each ring in a clean shop towel for storage.
Courtesy of GENERAL MOTORS COMPANY

NOTE:
DO NOT reuse the piston pin retainers.

Using the EN-46745 Piston Pin Clip Remover/Installer (5), remove the piston pin retainers (1) by using the removal access notch in the side of the piston (3). Discard the 2 piston pin retainers (1).
Slide the piston pin (2) out of the piston (3). The piston will disconnect from the connecting rod (4).