[dataway]

Attached in an image of the #4 connecting rod, as it sits between the pin bosses in an assembled engine. Note the difference in pin showing on one side compared to the other.

Is there a reason for this?

And

Keep in mind ... the pin being pressed in on center has nothing to do with this ... the pin floats in the piston ... it does not control where the rod sits in relation to the center line of the piston from front to back.

Stock crank, rpm rods, 400 block, nothing fancy.

The other picture shows the rod/pin on the same journal, other bank. Centered much better.

Most of the rods on the passenger bank are offset like this to varying degrees, the rods on the Driver side bank are closer to center, but not all perfect.

Yes: Rods are installed correctly, ie: chamfers, tangs, pistons pointing in the right direction.

What I would like to know, is first of all ... how many of you have actually peered inside the assembled engine to assess how the rods are centered between the bosses .... and if you have, what did yours look like? I have never heard of any spec, measurement or guideline as to if the rod should "appear" to be centered.

And of course this is not a matter of a few thousands ... it's closer to 1/8 - 3/16". So it would be a MAJOR problem (assuming it is a problem and not normal), not one that would require a micrometer.

And this engine assembly turns nice as it should, no binding, no problems, all clearances good.

(photos have been altered to remove any "distractions")