Piston and Connecting Rod Disassemble

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

EN-46745 Piston Pin Clip Remover/Installer

For equivalent regional tools, refer to Special Tools (LGX)Special Tools (LF4) .

Fig 1: Removing/Installing Piston Rings

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

Fig 2: Piston Pin Retainer

Courtesy of GENERAL MOTORS COMPANY

NOTE:

The connecting rod is non-directional and may be assembled/reassembled to the piston in either direction.
DO NOT reuse the piston pin retainers.

Using the EN-46745 remover/installer, remove the piston pin retainers by using the removal access notch (1) in the side of the piston. Discard the piston pin retainers.

Fig 3: Piston And Piston Pin

Courtesy of GENERAL MOTORS COMPANY

Slide the piston pin out of the piston. The piston will disconnect from the connecting rod.