Piston and Connecting Rod Disassemble

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

EN-46745 Piston Pin Clip Remover/Installer. See Special Tools .

Fig 1: Removing/Installing Piston Rings

Courtesy of GENERAL MOTORS CORP.

NOTE: 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 using a piston ring expander. Place each ring in a clean shop towel for storage.

Fig 2: Locating Piston Ring Retainers

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Be careful not to nick or gouge the piston or the retaining ring groove with the screwdriver if you plan to reuse the piston.

Using the EN-46745 remove the piston pin retainers by using the removal access notch in the side of the piston. See Special Tools .
Discard the old piston pin retainers.

Fig 3: Exploded View Of Piston & Connecting Rod Assembly

Courtesy of GENERAL MOTORS CORP.

Slide the piston pin (4) out of the piston. The piston will disconnect from the connecting rod (2).