Piston and Connecting Rod Disassemble

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

Special Tools

EN-46745 Piston Pin Clip Remover/Installer
EN-46745-4 Piston Pin Clip Remover/Installer Adapter

For equivalent regional tools, refer to Special Tools .

Fig 1: Piston Rings

Courtesy of GENERAL MOTORS COMPANY

WARNING:

Handle the piston carefully. Worn piston rings are sharp and may cause bodily injury.

Disassemble the piston rings (1, 2, 3, 4, 5). Use a suitable tool to expand the rings. The piston rings must not be reused.

Fig 2: Piston Pin Retainer And Special Tool

Courtesy of GENERAL MOTORS COMPANY

NOTE:

Two retainers hold each piston pin in place. Ensure that the piston pin is not damaged. Do not reuse the retainers.

NOTE:

Use the appropriate adapter for EN-46745 remover to remove the retainers. The appropriate adapter will fit the piston pin ID and allow the ring to be removed or installed.

For LCV/LKW/LD4 piston pin, use EN-46745-2 adapter.
For LTG piston pin, use EN-46745-4 adapter.

Remove the piston pin retainers using the EN-46745 remover (1) and the appropriate adapter. Discard the retainer.

Fig 3: Piston Pin, Connecting Rod And Piston

Courtesy of GENERAL MOTORS COMPANY

Remove the piston pin (1) and the connecting rod (3) from the piston (2).