Remove the injector sleeve o-ring from the injector bore in the cylinder head. Discard the o-ring.
Use solvent to clean the injector bore. Dry with compressed air.
Visually inspect the grooves (steps) in the bottom of the injector bore.
If the grooves (steps) are damaged or mutilated, use a pilot, Part No. ST-884-6; holder, Part No. ST-884-1; and
cutting tool, Part No. ST-788, to machine the grooves (steps) in the bottom of the injector bore.
Install the bead cutting tool and the cylinder head in a drill press. Set drill press speed at not more than 75 RPM.
Use a cutting oil to lubricate the cutter head.
Carefully machine the bottom of the bore until the grooves (steps) are smooth.
Clean the metal particles from the injector bore.
