So, I have a 1.6L gasser, i'm replacing all the little brown injector sleeves ( holders, bungs, retainer or any other name) that screw into the cylinder head. The Cylinder heads threads on one of injector ports is partially jacked up. I'm looking for the Metric size so i can try to thread chase it and try to clean it up a bit. I have narrowed it down to probly a M24 x 1.5 I know the pitch is 1.5 for sure but can' confirm the metric size. Anyone have any ideas?