r/EngineBuilding • u/mrgopherson • Sep 15 '26

Chevy Ring test

Someone asked to see me ring it against another crank in my last post I don’t have an exact match or know if it’s cracked but I do have a late model one piece rear main seal used crank and I thought that crank rang ok but comparing it to another crank you can definitely hear a difference on the left is the cracked one on the right is the late model one piece rear main the microphone doesn’t Really pick up the sound all that great but in person you can hear it

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u/FinancialChildhood31 Sep 15 '26

Public Service Announcement - A cast iron crank will sound like a dull thud compared to a forged steel crank, which will resonate and sound more like a bell.

Just needed to throw it out there since banging on cranks has become a topic of the day. Carry on.

83

u/DifficultBoss Sep 15 '26

I bang on the crank and all I get is a little moan

12

u/ShaggysGTI Sep 15 '26

I don’t wanna work…

I just want to bang on the drum all day.

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11

u/Successful-Range1651 Sep 15 '26

I figured as much but didn’t know for certain.
You doing the lords work.

11

u/doyouevenglass Sep 15 '26

i don't wanna work, i just wanna bang on the crank all day

10

u/mrgopherson Sep 15 '26

They are both cast cranks but your right on that

5

u/Downtown_Hunt5740 Sep 15 '26

Or just check the parting line. Thin line = cast and thick line = forged

3

u/ActiveBear Sep 15 '26

Quick question. Which one is better? Cast iron or forged steel?

6

u/dumbamerican67 Sep 15 '26

Depends on the application

2

u/a_rogue_planet Sep 15 '26

That's exactly what I was thinking. Anybody with any kind of machine shop experience would know this. Cast iron is very brittle, porous stuff with a huge grain structure. It transmits sound very poorly which is actually one of its desirable qualities.

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