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Thanks for the reply. I understand. I was stuck on thinking the #22 o-ring was also outside the bushing.

I am reassembling after an engine rebuild and noticed that two o-rings are missing from the front axle pivot pin. There are supposed to be 4 o-rings; a #7 and #22 on either side of the two bushings. Both of the #22 o-rings were missing. In trying to install them, the one that goes to the rear...

The pitting is pretty mild but it is on the mating surface. Its not obvious that the pitting is causing any problems but while I have the head off I'd prefer to correct it. I'm puzzled with the pre-combustion cups being proud. I can only assume that somehow they work their way out of their...

Ok, that helps. Thanks.

Thank you for the reply. I will have the pre-chamber plugs surfaced flush. If I had to guess, I would say I'm the first person to go through this engine since it was new so I don't think its been re-sleeved but I thought all of the d750 engines were sleeved from the factory. Sounds like my head...

I am rebuilding a D750 out of my B7100. I took my head to a local engine machine shop for a valve job. The head is very flat but has some mild pitting so the machine shop guy thought it should be resurfaced. There are these puck like inserts in the surface of the head that mates to the block...