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Author Topic: Master cylinder cover  (Read 1995 times)
BillOhio
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« on: May 14, 2014, 05:02:41 PM »

Anyone have a good picture of a 69 power front disc cover? Need picture of top/lettering
Thanks
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
1961 Chrysler 300G convertible
BillOhio
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« Reply #1 on: May 15, 2014, 10:06:57 AM »

My lid is not with me but I think it had wording around each bubble. I found this one. Seen some vendors have pictured one as correct for a 69z. Read a thread where both may have been used. Any opinions?
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
1961 Chrysler 300G convertible
cook_dw
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« Reply #2 on: May 15, 2014, 11:03:43 AM »

Ill look at the couple I have at home and post pics but as far as which one is correct I am not sure.
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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
ko-lek-tor
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« Reply #3 on: May 15, 2014, 01:13:17 PM »

I, too, have read about more than one cover for 69. I cannot prove that my cap is, in fact, "born with", but I have every reason to believe it is, as the orig. master cylinder is on the car (off now) 12B Nor. Bill, here goes:
Will also comment on the cap you picture Bill, I understand that there was no DOT specification in 69, so that cap would be wrong,IMO.
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Putting you First...Keeps me First. Talent on loan from God. Helping the hobbyist and exposing the fraud
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79
1969 307 4spd. coupe Daytona Yellow 711 bought in 85
Hot302
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« Reply #4 on: May 15, 2014, 01:29:19 PM »

Maybe we could get some of guys to chime in that have known original caps. I have been looking for one myself I would like to make sure it's right. Also was there only one cap used through out the production year? (69)
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Rick
69 RS/Z28
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« Reply #5 on: May 15, 2014, 01:43:02 PM »

Here is my original cap, it was replated when I had my booster rebuilt by Grigori...
I can take a 'straight on' photo to capture all the textual information if need be...


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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
6667ss138
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« Reply #6 on: May 15, 2014, 04:00:19 PM »

My original cap looks exactly like Gary's, word for word and number for number. Just has not been re-plated so not as pretty Smiley
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1969 07A X77D80 Hugger Orange/Black Vinyl Top, 3 owner car
1967 Chevelle SS396 138 Convertible/Red/Black int.
1966 Chevelle SS396 138 4sp California/Smog/Black/Red int.
BillOhio
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« Reply #7 on: May 15, 2014, 04:13:45 PM »

From what I remember mine looks like Bentleys and Gary's. Its at gregoris and had more pits than I liked. Garys looks really nice
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
1961 Chrysler 300G convertible
cook_dw
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« Reply #8 on: May 15, 2014, 04:20:22 PM »

FYI those pits and scratches can be worked out with time and patience.

Before


After - Notice that this is the style like the one you posted Bill.



Plated
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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
cook_dw
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« Reply #9 on: May 15, 2014, 04:22:38 PM »

Also Gary's is different than ko-lek-tor's.  Garys has SAE J1703 Brake Fluid
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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
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« Reply #10 on: May 15, 2014, 04:31:26 PM »

My original cap looks exactly like Gary's, word for word and number for number. Just has not been re-plated so not as pretty Smiley

Maybe we got that 'special MC cap..    reserved for the special HO camaros.. Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
cook_dw
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« Reply #11 on: May 15, 2014, 04:41:39 PM »

Maybe we got that 'special MC cap..    reserved for the special HO camaros.. Smiley


Caption should read:

OMG....

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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
Mike S
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« Reply #12 on: May 15, 2014, 05:04:57 PM »

Also Gary's is different than ko-lek-tor's.  Garys has SAE J1703 Brake Fluid
Ko-lek-tor's looks like a 67 cap.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
6667ss138
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« Reply #13 on: May 15, 2014, 05:44:16 PM »

My original cap looks exactly like Gary's, word for word and number for number. Just has not been re-plated so not as pretty Smiley

Maybe we got that 'special MC cap..    reserved for the special HO camaros.. Smiley
Yep, thats exactly what I was thinking... Smiley
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1969 07A X77D80 Hugger Orange/Black Vinyl Top, 3 owner car
1967 Chevelle SS396 138 Convertible/Red/Black int.
1966 Chevelle SS396 138 4sp California/Smog/Black/Red int.
Boston14
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« Reply #14 on: May 15, 2014, 09:57:00 PM »

My early 1969 11D (68) SS/RS was born with the same cap that  ko-lek-tor has posted.  I believe the caps were an early vs. late thing.  Can't swear to a changeover date, but, I know mine is original.

boston14
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boston14

1969 RS/SS 350 Convertible
Dover White with Black Top and D90 stripe, Red Standard Interior
z28z11
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« Reply #15 on: May 15, 2014, 11:26:24 PM »

My X77 01C Z's cap looks like ko-lek-tor's, no DOT, no J spec. Could not get resolution tonight, will try for pic tomorrow (cap is unrestored, pretty crusty).

Regards -
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1968 Z28 BRG/W
1969 Z28 X77 LeMans/W
1969 X66 L78 Cortez/BVT
1969 Z11 L48
Marty
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« Reply #16 on: May 15, 2014, 11:33:03 PM »

My 68 cap also looks like the one ko-lek-tor posted. I bought the master cylinder with a July 68 booster. Martin
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Martin Foltz
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68 Van Nuys Camaro
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« Reply #17 on: May 16, 2014, 02:43:46 AM »

my 03E `69 is the same as Gary`s too, only it got chromed in the 70`s  Sad
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Eldon W
1969 Black Z28
X77 03E 38,000 miles
unrestored
Mike S
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« Reply #18 on: May 16, 2014, 07:30:35 AM »

As a suggestion, if the cover you have is pitted, instead of getting one with surface pits redone, you can buy an exact repro (shape and stampings) for around $25 from many Corvette parts places. Outside from correct fonts there are no date codes to worry about.
There are two type of repros I have seen where it comes to the 4 vent holes on the sides of the cover under the bail wire. Some have the vent punches facing out and others have it facing inside. I have only seen inside facing vents (like those shown by ko-lek-tor) and those on my 67's.
  The place that has correct looking caps with the inside facing vents: http://www.westcoastcorvette.com/

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
cam69aro
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« Reply #19 on: May 16, 2014, 11:20:24 PM »

here a pic of mine, chrome and all. any easy or good way to remove the chrome ? i read brake fluid will take it off ?
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Eldon W
1969 Black Z28
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« Reply #20 on: May 18, 2014, 12:14:16 AM »

Plating shops can strip it off for you, and possibly they can replate it as you like..  I don't think brake fluid will remove chrome..  (but I was wrong once before.. at least.. ) Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
cam69aro
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« Reply #21 on: May 19, 2014, 06:34:07 PM »

for now i plan on leaving the chrome, it preserved it well over the last 35-40 years
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Eldon W
1969 Black Z28
X77 03E 38,000 miles
unrestored
69 Zee
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« Reply #22 on: September 04, 2014, 02:21:34 PM »

Not sure if GM used different covers, but I know for sure that Ko-lek-tors is original.  It has the exact same lettering as my 03B Z garage/barn find was found with (pic below).  It's an original untouched cover like many other of my parts.
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Darrell

69 Z/28 Dusk Blue, White Top, all original parts & matching #'s
69 Camaro Fathom Green X44
79 Corvette, Metallic Brown L48.  Sold early 2014 after 31 yrs
76 Corvette, White w/Choc Int, 4 spd L48 - gone
69Z28-RS
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« Reply #23 on: September 04, 2014, 09:38:02 PM »

A little background information from the SAE standards committee on the J1703 brake fluid std, thru the period 1967-1970...

From the SAE website:       History of the SAE J1703 standard...

J1703C_197107         1971-07-01 Historical Revised
J1703B_197007         1970-07-01 Historical Revised
J1703A_196804         1968-04-01 Historical Revised
J1703_196709           1967-09-01 Historical Revised

-------------------------------------------------------------------------------
Motor Vehicle Brake Fluid           Standard       1967-09-01

This SAE Standard covers motor vehicle brake fluids of the nonpetroleum type for use in the braking system of any motor vehicle such as a passenger car, truck, bus, or trailer. These fluids are not intended for use under arctic conditions. These fluids are designed for use in braking systems fitted with rubber cups and seals made from styrene-butadiene rubber (SBR), or a terpolymer of ethylene, propylene, and a diene (EPDM).
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
ss jim
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« Reply #24 on: September 09, 2014, 01:44:24 PM »

Mine looks like Gary and Eldon's. Especially Eldon's because I had mine chrome plated in 1980. I bought the car in April 1971. Car is 1969  01C, X55. Jim
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zdld17
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« Reply #25 on: September 09, 2014, 07:10:36 PM »

Guys, are we talking about two styles of caps or one.    Tall/narrow or short /fat ?  I thought there were two styles.
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Don Dabbs
enio45
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« Reply #26 on: September 09, 2014, 08:31:04 PM »

also - later 69 caps have the vent holes on the side......
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Eddie  Montini
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« Reply #27 on: September 14, 2014, 06:26:20 AM »

To help establish info here is a lid off a 5/31/68 dated Engineering Unit that was never installed. Parts List that came with unit lists cover as #5455517


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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
z28z11
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« Reply #28 on: September 14, 2014, 09:44:56 AM »

Chick,

Wow - what a piece. Time capsule -

Regards,
Steve
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1968 Z28 BRG/W
1969 Z28 X77 LeMans/W
1969 X66 L78 Cortez/BVT
1969 Z11 L48
68camaroz28
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« Reply #29 on: September 20, 2014, 07:25:17 AM »

Just posted this on the thread on the late 1969 09D Z/28 survivor and thought would post here as well for future searches.
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Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584
KurtS
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« Reply #30 on: September 22, 2014, 10:15:22 PM »

Both have: Service With Delco Parts

Version 1 has: Use Delco Brake Fluid
67 & 68 cars &
11D
12B
01C
03B

Version 2 has: Use Delco SAE J1703 Brake Fluid
01C
03E
07A
09D
09C

So apparently there was a transition in mid-69 when both were used.
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Kurt S
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Mike S
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« Reply #31 on: September 22, 2014, 10:22:24 PM »

 If you want more samples then I'll add my '67 04B and 05B has the original covers s with the Use Delco Brake Fluid stamp.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
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« Reply #32 on: September 23, 2014, 10:52:14 AM »

I'm assuming all 67 & 68 cars have the Version 1 cover. I have never seen anything to contradict that.

Thanks!
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Kurt S
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Stingr69
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« Reply #33 on: September 24, 2014, 08:21:14 PM »



I don't have many important pieces still left on my car that I could reasonably believe were original BUT I do believe that this master cylinder/cover/booster is original.  This is a valid datapoint for this '69 Z built first week of October '68.  So glad I have something to contribute.  Grin

-Mark.
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Hot302
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« Reply #34 on: September 27, 2014, 11:57:05 AM »

Hey Mark, What's the date code on your master cylinder?

Rick
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Rick
69 RS/Z28
No Stripes
Stingr69
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« Reply #35 on: September 28, 2014, 09:48:27 AM »

Date Code for above.  Should line up for a 10A of '68 for a '69 model year car.
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hubleyman
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« Reply #36 on: September 28, 2014, 02:36:48 PM »

My 10A of '68 1969 Z/28 master cylinder has a date code of 241.  I believe it is original to the car?

My original cover is the version 1 style (which I still have), but I currently have the version 2 style on the car - that I stole from my Jan of '69 Z/28.
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Stingr69
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« Reply #37 on: September 28, 2014, 07:07:19 PM »

My 10A of '68 1969 Z/28 master cylinder has a date code of 241.  I believe it is original to the car?

My original cover is the version 1 style (which I still have), but I currently have the version 2 style on the car - that I stole from my Jan of '69 Z/28.

Sounds like a similar data point. Date code is 2 days away from mine and we have the same production week.  

I have a good original steering box as well.  I bet those would be close too.

-Mark.
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