Rod dent
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
IMHO asking me or anyone who is not a machinist who balances rotating assemblies, would just be an opinion...I would take it to a machine shop and ask them. You would be surprised how a very little bit of metal weighs.
Teching In
Joined: Mar 2023
Posts: 38
Likes: 19
From: USA
You could build it to rev to 10,000 rpm or add a 2000 hp power adder and when that rod fails it's not going to be because of that mark.
You can either run it or replace it. But if you replace it is it worth rebalancing the whole rotating assembly for that? No it's not.
If it bothers you that bad have someone who does concourse restorations file it off and blast the finish to match. I'd bet every car I own that this wouldn't change the weight any more than carbon build up on a piston from normal running.
I'd also bet you could send the rotating assembly to a reputable shop to be balanced and it'll come back with that mark still there.
You can either run it or replace it. But if you replace it is it worth rebalancing the whole rotating assembly for that? No it's not.
If it bothers you that bad have someone who does concourse restorations file it off and blast the finish to match. I'd bet every car I own that this wouldn't change the weight any more than carbon build up on a piston from normal running.
I'd also bet you could send the rotating assembly to a reputable shop to be balanced and it'll come back with that mark still there.
Launching!
Joined: Dec 2013
Posts: 255
Likes: 58
From: Portugal
I asked a chum of mine who is a Boeing test engineer, his response:
"Are you worried about the peen on the rod flange? A penetrant test wouldn’t hurt.
For me, I’d just get new rods. A stress riser on the flange is not what you want. But I’m a bourgeois."
I would look at 2 options:
1. new rod rebalanced to dented rod specs.
2. use a fine grit belt sander longitudinally to take edges off dent, then penetrant or mag test
"Are you worried about the peen on the rod flange? A penetrant test wouldn’t hurt.
For me, I’d just get new rods. A stress riser on the flange is not what you want. But I’m a bourgeois."
I would look at 2 options:
1. new rod rebalanced to dented rod specs.
2. use a fine grit belt sander longitudinally to take edges off dent, then penetrant or mag test
Teching In
Joined: Mar 2023
Posts: 38
Likes: 19
From: USA
I asked a chum of mine who is a Boeing test engineer, his response:
"Are you worried about the peen on the rod flange? A penetrant test wouldn’t hurt.
For me, I’d just get new rods. A stress riser on the flange is not what you want. But I’m a bourgeois."
I would look at 2 options:
1. new rod rebalanced to dented rod specs.
2. use a fine grit belt sander longitudinally to take edges off dent, then penetrant or mag test
"Are you worried about the peen on the rod flange? A penetrant test wouldn’t hurt.
For me, I’d just get new rods. A stress riser on the flange is not what you want. But I’m a bourgeois."
I would look at 2 options:
1. new rod rebalanced to dented rod specs.
2. use a fine grit belt sander longitudinally to take edges off dent, then penetrant or mag test
How to waste money 101.
Building a small block chevy to Boeing specs LMAO.
This **** would be running by now if it was mine.
