Casting dates and broach marks

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Jul 6, 2010 | 11:19 AM

remotecontroller

Thread Starter

Racer

Joined: Aug 2005

Posts: 425

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From: Austin tx

Casting dates and broach marks

Curious about casting dates and broach marks. Were blocks done on a Monday through Friday basis only, or did they do them on weekends as well? Were there also Weekdays that they didn't pour castings (Like on Fridays or anything)? If it makes a difference, I am wondering regarding Flint Motors between '57 and '67.

Also, at what point was the "longitudinal" block broaching stop? I have a '58 with the straight, front-to-back broach marks, but wondering when they stopped doing that and started using a circular milling machine process like shops use today.

Thanks!

Ken

Jul 6, 2010 | 12:25 PM

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

Likes: 1,926

From: Washington Michigan

Quote:

Originally Posted by remotecontroller

The foundries normally poured on a six-day two-shift schedule, and kept the cupolas going on third shift and on Sundays. Saginaw supplied about 55,000 raw castings per day to Flint V-8.

Flint V-8 normally ran a six-day schedule (three shifts in Machining and two in Assembly); demand was enormous in the 50's and 60's. Flint V-8 and Tonawanda each built 5500 engines per day (300 per hour).

Flint V-8 and Tonawanda both used the huge horizontal block broaches as long as they built the Gen 1 small-blocks (through 1999 at Flint) and Mark IV big-blocks at Tonawanda. Neither plant ever built the "LS" series small-blocks - those engines come out of Romulus, Livonia, St. Catherines, and Silao, Mexico

Last edited by JohnZ; Jul 6, 2010 at 12:30 PM.

Jul 6, 2010 | 06:25 PM