Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C1 & C2 Corvettes
General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations Sponsored by
Flaming River
Industries

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 04-14-2011, 08:28 AM   #1
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default Are brake master cylinders date coded?

My '66 appears to have the wrong brake master cylinder, as follows:

Click the image to open in full size.

I understand that the '66 had a master cylinder that was unique to two years of production, I believe '65 and '66. Is this correct?

The correct part looks like this:

Click the image to open in full size.

I am in no particular hurry to return this part to original but intend to be on the look out for the correct part. In doing so, I need to know whether the brake master cylinder for a '66 is date coded.

BTW. My car's build date is October 8, 1965
BrentF is offline   Reply With Quote
Old 04-14-2011, 02:09 PM   #2
vark_wso
CF Senior Member
 
vark_wso's Avatar
 
Member Since: Aug 2004
Location: Colorado Springs CO
Default

The lower photo shows the correct casting style for '65-'66 model year. The upper photo with the bails & one-piece cap is '67 & later style.
vark_wso is offline   Reply With Quote
Old 04-14-2011, 02:14 PM   #3
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by vark_wso View Post
The lower photo shows the correct casting style for '65-'66 model year. The upper photo with the bails & one-piece cap is '67 & later style.
Thanks for confirming that. Are the castings for the '65-'66 model year dated? I don't want to go to the great expense of getting the proper part ($800 - $1,000) and not have the proper date. Are these castings dated?
BrentF is offline   Reply With Quote
Old 04-14-2011, 03:23 PM   #4
gbvette62
CF Senior Member
 
gbvette62's Avatar
 
Member Since: Oct 2000
Location: Shamong, NJ
Default

Quote:
Originally Posted by BrentF View Post
Thanks for confirming that. Are the castings for the '65-'66 model year dated? I don't want to go to the great expense of getting the proper part ($800 - $1,000) and not have the proper date. Are these castings dated?
Some MCs do have a date stamped on the flange, were they bolt to the booster. I don't recall if the 65-66 power MCs are dated though.

The original casting number of the 65-66 power MCs is 5467084, and is found cast into the side of the MC. More important than the date on these MCs, is the brake line diameter. These master cylinders came in two versions. The first design one was used for part of 65, and used a 3/16" line. The second design MC, was used for the later part of 65, and all of 66. The later one uses 1/4" lines. There are no markings on the MCs to differentiate which line size the master cylinder is, so you have to be careful to make sure you get the 1/4" line one.

If you can find a good useable 65-66 power MC for $800-$1,000, grab it. The re-builders pay $1,000 for cores. The 65-66 PB MC's always need to be sleeved. A stainless steel sleeved rebuilt, without a core, will set you back about $1,500.

There is a repro coming, but I'm not sure if it's available yet. I think the price is supposed to be around $350?
gbvette62 is offline   Reply With Quote
Old 04-14-2011, 03:40 PM   #5
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by gbvette62 View Post
Some MCs do have a date stamped on the flange, were they bolt to the booster. I don't recall if the 65-66 power MCs are dated though.

The original casting number of the 65-66 power MCs is 5467084, and is found cast into the side of the MC. More important than the date on these MCs, is the brake line diameter. These master cylinders came in two versions. The first design one was used for part of 65, and used a 3/16" line. The second design MC, was used for the later part of 65, and all of 66. The later one uses 1/4" lines. There are no markings on the MCs to differentiate which line size the master cylinder is, so you have to be careful to make sure you get the 1/4" line one.

If you can find a good useable 65-66 power MC for $800-$1,000, grab it. The re-builders pay $1,000 for cores. The 65-66 PB MC's always need to be sleeved. A stainless steel sleeved rebuilt, without a core, will set you back about $1,500.

There is a repro coming, but I'm not sure if it's available yet. I think the price is supposed to be around $350?
Hey gbvette62, thanks for that detailed response. Just the information that I was seeking. Didn't know about the repro on the horizon either.
BrentF is offline   Reply With Quote
Old 04-14-2011, 03:56 PM   #6
Nowhere Man
CF Senior Member
 
Nowhere Man's Avatar
 
Member Since: Feb 2003
Location: Sitting in his Nowhere land New Oxford Pa
http://www.facebook.com/home.php?
Send a message via AIM to Nowhere Man
Default

Quote:
Originally Posted by gbvette62 View Post

There is a repro coming, but I'm not sure if it's available yet. I think the price is supposed to be around $350?
they are out.
Nowhere Man is offline   Reply With Quote
Old 04-14-2011, 04:17 PM   #7
BT427
CF Member
 
BT427's Avatar
 
Member Since: Dec 2004
Location: Glendale Arizona
Default Master cylinder dates

The castings are Julian dated. The "date" is visable from the output line side of the housing. The attached show a "98" for example. The year is dictated by the size of the line.

[IMG]Click the image to open in full size.[/IMG]
BT427 is offline   Reply With Quote
Old 04-14-2011, 05:50 PM   #8
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by BT427 View Post
The castings are Julian dated. The "date" is visable from the output line side of the housing. The attached show a "98" for example. The year is dictated by the size of the line.

[IMG]Click the image to open in full size.[/IMG]
That's very interesting. Thanks. So what date would the unit above be?
BrentF is offline   Reply With Quote
Old 04-14-2011, 05:51 PM   #9
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by Nowhere Man View Post
they are out.
Thanks Available from whom?
BrentF is offline   Reply With Quote
Old 04-14-2011, 06:53 PM   #10
BT427
CF Member
 
BT427's Avatar
 
Member Since: Dec 2004
Location: Glendale Arizona
Default Caliper Date

April 8th 1966, or 65, depending on when your car was built.

bt
BT427 is offline   Reply With Quote
Old 04-14-2011, 07:11 PM   #11
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by BT427 View Post
April 8th 1966, or 65, depending on when your car was built.

bt
Thanks bt. You learn something new every day. Here is the Julian Day calendar (for a non leap year), at least the part that would fit into my screen shot. From this you can see how 98 translates into April 8th:

Click the image to open in full size.
BrentF is offline   Reply With Quote
Old 04-14-2011, 07:21 PM   #12
Nowhere Man
CF Senior Member
 
Nowhere Man's Avatar
 
Member Since: Feb 2003
Location: Sitting in his Nowhere land New Oxford Pa
http://www.facebook.com/home.php?
Send a message via AIM to Nowhere Man
Default

Lone Star Corvette

1965 http://www.lonestarcaliper.com/ps-77...-cylinder.aspx

1966 http://www.lonestarcaliper.com/ps-78...-cylinder.aspx

call for price
Nowhere Man is offline   Reply With Quote
Old 04-14-2011, 07:56 PM   #13
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Quote:
Originally Posted by Nowhere Man View Post
Thanks, but these don't appear to be repros (as in reproductions)?
BrentF is offline   Reply With Quote
Old 04-14-2011, 08:09 PM   #14
Nowhere Man
CF Senior Member
 
Nowhere Man's Avatar
 
Member Since: Feb 2003
Location: Sitting in his Nowhere land New Oxford Pa
http://www.facebook.com/home.php?
Send a message via AIM to Nowhere Man
Default

I believe they are. when I looked at them At Corvettes At Carlisle you could get them without numbers or with. call and find out.
Nowhere Man is offline   Reply With Quote
Old 04-14-2011, 11:00 PM   #15
gbvette62
CF Senior Member
 
gbvette62's Avatar
 
Member Since: Oct 2000
Location: Shamong, NJ
Default

Quote:
Originally Posted by Nowhere Man View Post
The ones listed on Lonestar's website are rebuilt originals, and require a rebuildable core, or an expensive core charge.

Quote:
Originally Posted by Nowhere Man View Post
I believe they are. when I looked at them At Corvettes At Carlisle you could get them without numbers or with. call and find out.
The ones Lonestar had that had GM/Delco markings and numbers, were rebuilt originals. The ones without any numbers, are an old replacement 65-66 power MC, that was made years ago by a company that is no longer in business. I think it was the same company that originally made the heavy-duty rear end covers. Gentilli maybe??????

Quote:
Originally Posted by BrentF View Post
Thanks Available from whom?
They're coming from Corvette Stainless Steel Brakes (CSSB) of Miami, FL. Their website says "Coming Soon". I thought that I got a flier or new wholesale catalog from them recently, with the price and availability, but I can't find it at the moment. I think these have the original GM numbers on them, but they may not have the Delco logo?
gbvette62 is offline   Reply With Quote
Old 04-14-2011, 11:00 PM   #16
Donald #31176
CF Senior Member
 
Member Since: Jul 2004
Default

Quote:
Originally Posted by BrentF View Post
Thanks Available from whom?
Corvette Stainless Steel Brake Inc


http://www.cssbinc.com/c2mastercylinders.aspx
Donald #31176 is offline   Reply With Quote
Old 04-14-2011, 11:05 PM   #17
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

Good stuff gbvette62 and Donald:

Here's what appears on CSSB's website:

Click the image to open in full size.

Last edited by BrentF; 04-14-2011 at 11:20 PM.
BrentF is offline   Reply With Quote
Old 04-15-2011, 12:50 PM   #18
JohnZ
CF Senior Member
Support Corvetteforum!
 
Member Since: Oct 2000
Location: Washington Michigan
Default

The CSSB GM-licensed/correct '65-'66 power master cylinders are $849.99.
JohnZ is offline   Reply With Quote
Old 06-06-2011, 11:13 PM   #19
BrentF
CF Senior Member
 
BrentF's Avatar
 
Member Since: Jan 2011
Location: Toronto Ontario
Default

UPDATE:

I just took delivery of this original '66 remanufactured brake master cylinder that I sourced from Crane Corvette Supply. The date code of 251 (September 7th) works well with my car's build date of October 5, 1965

Click the image to open in full size.

Click the image to open in full size.
BrentF is offline   Reply With Quote
Old 06-06-2011, 11:13 PM
 
Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Reload this Page Are brake master cylinders date coded?
 
 
 
Reply

Tags
1965, 350, 5467084, brake, calendar, chevrolet, codes, corvette, corvetteforum, cylinder, date, julian, leap, master, year


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 12:02 PM.


Emails & Password Backup