Just a trivial update.
One crank inspection involves "rocking" the conrod, and measuring the deflection.
That's nice, but what does that translate to as the conrod's big end "axial" clearance?
Using these dimensions for the 447 connecting rods:
Assuming that:
The conrod big end ID is straight/square/true,
The big end roller bearings are straight/square/true,
The crankpin OD is straight/square/true,
And the "rocking" measurement is done at the outer edge of the small end,
Then it calculates out that the conrod's axial clearance to the crankpin is about 1/14th of the "rocking" value.
The new and service limit values of the "rocking" measurement runs from 0.8mm to 2.0mm.
Using the 1:14 ratio, we get these axial clearances:
0.8mm (0.032") --> 0.057mm (0.0022") (about 0.002")
1.0mm (0.040") --> 0.071mm (0.0028") (about 0.003")
2.0mm (0.080") --> 0.143mm (0.0056") (about 0.006")