Thanks Pete, I will ask around to find a shop which can do this. The place I'm bringing the head might be able to. Otherwise it will be a fun time finding a place. I appreciate the suggestion, I was about to think I could use them as-is.Crankshaft is beautiful!. Now the rods need some love
Shot peening is a common thing to do to extend their life, and what I will be doing
Top surfaces were bare with no markings before cleaning. They look identical to the other ones (pictures aren't clear) in height, only visual difference is that small ring of material removed from them. Not sure what to make of this.Hi there, in your pictures of 6 pistons, on the top of the dome of pistons 4, 5, 6 is there a number that's something along the lines of 7222? If so they are Borgo 10.4's. Those three look like it anyway, from that picture anyway.
The shop that cleaned my liners said they measured in spec, I think I'll double check this anyway. I'm not home so I can't check my overhaul manual (at least I think I have the factory manual), is this .0016" - .0023" on both sides or do I put the piston touching the liner wall on one side and measure clearance on the other?@stevespiderguy , If this has already been mentioned, I apologize. Measuring the liners at the indicated spots, measuring for taper and out of round can be brain numbing. Looking for the maximum taper and out of round of .0004" makes me cross-eyed. If I am considering reusing the P&L's, I just measure the piston to liner clearance with long feeler gauges. You can buy a set ( 11'' long, .0015" to .040" ) on Amazon for less than $20. The (Alfa) Factory Engine Overhaul Manual gives a piston to liner clearance of .0016" - .0023". I have rebuilt street engines with as much as .004" with no issues. Be sure to check the fit of the pin and pin bore in the pistons, too. As for the rods, I always replace the small end bushings (give the machine shop the piston pins and they will size - hone the bushing to fit properly). My machine shop guy also (as a matter of course) takes a thousand or two off the big end cap and then rebores the big end to spec. He says that they all get "ovalated" and this makes the big end round (and to spec) again. If the Forum has Publication PA8777 ENGINE OVERHAUL MANUAL, read it. It's a wealth of information.