It's an acronym.Selador said:The pistons in my engine have markings on them. Not numbers. Letters.
1 and 2 have what looks like a C, or an O marked on them.
3 and 4 have what looks like either a B, or an M.
Can anyone tell me what these mean ?
You know what's really funny is that it actually does look like it is C on #1, O on #2, B on #3, and M on #4.electricpuppyboy said:It's an acronym.
The Motor Fairy stamps them on the pistons at night after an old fart starts an engine rebuild project.
Don't worry, it'll bring you good luck.
Thank you.squatch said:That's it. Maybe not an arrow but that is what Isuzu calls a cutout front mark. It should be on the front side of the engine for every piston.
You can see it on the #1 piston in this pic of my engine.
Do you have a factory manual? There are several real specific things about connecting rod, piston, and ring placement that is not in the aftermarket manuals. Things that will make a big difference in the long haul. Ring placement is a little different than the norm in these engines.