Section 2 - Cylinder Head - Group 02 Service Tools - Cylinder Head M11 Page 2-5 Tool No. Tool Description Tool Illustration Injector Sleeve Puller Remove the injector sleeves from the cylinder head. This tool is designed for use with an air impact wrench. 3377079 Expansion Plug Driver Install the 1.010 inch diameter expansion plugs in the cylinder head. Use with handle, Part No. 3376795. 3376816 Valve Seal Driver 3823946 Used to install valve seals onto the valve guides. Valve Guide Driver Used to install valve guides requiring valve seals to the proper assembled height in the cylinder head. 3823947