Rotating assy balance

Tays340 said
When I pulled the engine apart I stamped each rod and cap.
I am so on a budget here, New rods? They said the pistons would be destroyed if had to be changed. He did weld up the crank some and add a hole. When I put #8 cap on #5 rod it binds before it seats. I don't like it.
I thought the whole purpose of balancing was to get all the components to weigh the same before you made bob weights to balance the crank. This looks like it would shake apart and kill every bearing on cam break-in. But i'm naive. Still 13 grams between #3 journal and #4.
I guess I'm headed back to the machinist for some explanation, but, in my opinion, this is not right.View attachment 1715747234 View attachment 1715747235 View attachment 1715747236

If the machinist swapped caps to the get balance job done you’ll be starting over. That is ridiculous.

Also, getting everything down to a gram or less on each end is mental masturbation and losing money. You do all that work and then what happens to all the oil slinging around in the crank case and hanging onto the parts.

If the rods are within a few grams on each end and the crank is within 10 grams I’d send it. And I lost money trying to balance this junk to under a gram everywhere. 2 plane balancing isn’t as accurate as one would think.

I’ll see if I can find a link to a really good webinar on crank balancing and I’ll post it here. Watch it as many times as you have to so you can get a better understanding of what is happening. That way you can have a logical discussion with the guy doing the job. And he won’t be able to bullshit you the better educated you are.