Broaching

Belair62 · #1 10-20-2005, 06:21 AM

Here is a 63 409 engine...untouched...seems they didn't machine or broach them early on like they did later///anyone know when they changed machining ??...this shows it better

**allcamaro** · #2 10-20-2005, 07:20 AM

So now im really mixed up.

**Salvatore** · #3 10-20-2005, 07:29 AM

Is this your motor Bob?

**Zedder** · #4 10-20-2005, 07:37 AM

I know that all Corvette blocks have broach marks even back in the '50's...I'd say that block has been machined at some point.

Belair62 · #5 10-20-2005, 07:50 AM

Yes Sam and it hasn't ever been machined.

**Charley Lillard** · #6 10-20-2005, 07:55 AM

Looks to me like it has been machined.

Belair62 · #7 10-20-2005, 08:05 AM

I was the first guy to pull the pan off the thing...standard bore,factory pistons...can't see them machining the deck and missing the numbers...never been re-stamped unless it was done in the 60's

**Mr70** · #8 10-20-2005, 08:19 AM

Could it have been done in the 70's?
I didn't think the circular machines were used until then.

Seattle Sam · #9 10-20-2005, 08:29 AM

Could it have required additional machining at the factory, before the numbers were ever put on it?

Belair62 · #10 10-20-2005, 08:42 AM

Did anyone give a crap about an original stamping on a 409 in the 70's ? I doubt it...you could still get crate 409's then too...pan has never been off until last night !! Unless someone took a 6 inch sanding pad and gave it a cleaning. The "high" spots in the stampings are a bit shiny...

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