Master cylinders date coded?
Thread Starter
Drifting
Joined: Sep 1999
Posts: 1,439
Likes: 1
From: Hagerstown MD
Master cylinders date coded?
Hey, I was wondering whether master cylinders are date coded. I'm thinking of replacing mine since the engine is out (along with just about every other part that moves), and if it's date coded and original, I'll spend a few extra coins to have it rebuilt.
Ken
'77 Orange Shark
Ken
'77 Orange Shark
Team Owner
Joined: Aug 2000
Posts: 21,440
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From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Re: Master cylinders date coded? (zymurgist)
Yes they are. They are date coded at the front line, just above the fitting. Very, very small characters. My '80 for instance is like YC0122. Which is 1980, 122nd day of the year. Depending on when your car was built, yours could be like YC6244, which would be 244th day of '76.
Race Director
Joined: Apr 1999
Posts: 10,861
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From: Beverly Hills/Pine Ridge Florida
Re: Master cylinders date coded? (Paul Borowski)
Also, the casting number can be "right side up", or "upside down" depending on whether the piece was cast on the day or night shift. Don't remember exactly, but they are date coded differently between day and night shift. Both use Julian dates, but one is "year"---day" format 3330, 1973, 330th day, and the other is "day---year" format, 3330, 1970, 333rd. day. :) Confused. I don't remember which is which. Chuck
Team Owner
Joined: Aug 2000
Posts: 21,440
Likes: 458
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Re: Master cylinders date coded? (Chuck Gongloff)
Exactly right Chuck!!! See you tomorrow???
Thread Starter
Drifting
Joined: Sep 1999
Posts: 1,439
Likes: 1
From: Hagerstown MD
Re: Master cylinders date coded? (Paul Borowski)
Hmmmmm. I'm going to have to get some bright lights in my garage so I can figure out whether my M/C might be original. It's all rusty so any characters are pretty hard to see. Thanks for the info!
