What does casting info mean on Master Brake Cylinder

[Joe L.]

Re: What does casting info mean on Master Brake Cylinder

With the information given in this tread, would that mean that the brake cylinder with casting information also on the outboard side, be an original piece. And the brake cylinder in my -66 Coupe with correct casting on the inboard side (DELCO MORAINE 5467084 1 DIA) but no casting info on the outboard side, be an old reproduction and not original?

Hans

Hans------


It could be the original master cylinder or it could be a once-available GM SERVICE part. They would appear identical.

[Tony N.]

Re: What does casting info mean on Master Brake Cylinder

Looking to understand more about date code on 1965 Corvette Power brake master cylinder. I can't find any photo in the NCRS judging catalog, 6th edition that shows this? It states Julian date code embossed as a casted number towards the rear on the side the brake lines attach. I have a guy who stamps the date code in but is that correct, stamped in? States the stamping shows last digit of year followed by 3 digits representing chronological day of the year manufactured (Julian)? Can someone provide the correct insights to this detailed information?

[David H.]

Re: What does casting info mean on Master Brake Cylinder

... states Julian date code embossed as a casted number towards the rear on the side the brake lines attach. I have a guy who stamps the date code in but is that correct, stamped in? ...

Tony

Welcome to NCRS Forum.

You are correct, production information, in this case, is "cast in" not stamped. Often (not always), "stamped" information is placed on a machined surface e.g. engine stamp pads, machined front of brake master cylinders, etc.

Dave

p.s. you will often get more response to your questions if you just start a new thread rather than add on to an inactive thread.

[Dan A.]

Re: What does casting info mean on Master Brake Cylinder

'65-6 power brake master cylinders casting date format is day of the year only. It does not have a year designator. I have attached sample photos.

1965 Power Brake Master Cyl lt-text.jpg

3-16ths lines 112 cast date-text.jpg

[Joe L.]

Re: What does casting info mean on Master Brake Cylinder

'65-6 power brake master cylinders casting date format is day of the year only. It does not have a year designator. I have attached sample photos.

[ATTACH=CONFIG]106931[/ATTACH]

[ATTACH=CONFIG]106932[/ATTACH]

Dan-------


Yes, this type of casting date was used on most Delco brake system components cast at the old GM Danville, IL foundry (that's what the "D" casting symbol denotes). This makes 1/2 of the 1965 or 1966 power brake master cylinders ever cast to be CASTING DATE correct for any particular car. I do not think that 65-66 master cylinders had ASSEMBLY date stampings. Later master cylinders had assembly date stampings which included the julian date + single digit for year.

[Tony N.]

Re: What does casting info mean on Master Brake Cylinder

Thank you Dave.

I'm trying to learn how to use the forum. I haven't quite figured out how to start a new thread but thank you for the insights.

I'm still unclear on your information. Your stating that yes production information casted in but that it also can be stamped in on a machined flat surface and that would be located at the front of the brake master cylinder?

Tony Nicosia

[Don H.]

Re: What does casting info mean on Master Brake Cylinder

Tony
if you look at the first page of this forum, or any page, you will see a heavy black line above the list of threads, Above that a definition of the purpose of the Technical Discussion Board (TDB), and above that a large oblong black button saying Post New Thread. Click to start a thread.
Above that are a couple of tool bars, and in the smallest one, you see the FAQ link. Touch that to find answers to questions you have about using the TDB.

[David H.]

Re: What does casting info mean on Master Brake Cylinder

Thank you Dave.

I'm trying to learn how to use the forum. I haven't quite figured out how to start a new thread but thank you for the insights.

I'm still unclear on your information. Your stating that yes production information casted in but that it also can be stamped in on a machined flat surface and that would be located at the front of the brake master cylinder?

Tony Nicosia

Tony

Check out this link from John Hinckley re Casting Marks - I think you will find it useful.

http://www.camaros.org/pdf/cast_codes.pdf

Dave