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Author Topic: 346 67-68 master cylinder cover  (Read 980 times)
gary
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« on: December 22, 2012, 09:00:37 AM »

 Anybody tell me what the orginal assembly line 346 master cylinder cover WORDING was in 67 and 68  on Z/28 cars? All the repos are the same for 67-69. They made a couple of different covers in 69 with different wording but I don't know what is correct for 67 and 68. Thanks and Happy Holidays
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1968 Z28
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« Reply #1 on: December 22, 2012, 01:14:46 PM »

Gary.....pictures of my 1968 Z28 07c original.  Hope this helps.

   

   

   
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
gary
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« Reply #2 on: December 23, 2012, 08:26:04 AM »

Thanks Jerry,
     Thats the one I had for my 6D 68 Z/28. Now I know its correct. When you have time is there a date on your 346 master cylinder? I found one on my 69 Z/28 309 master but not one on  the 346. Mine has D1 or D2 on the side.  Have a Merry Christmas.   Thanks again, Gary
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JohnZ
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« Reply #3 on: December 23, 2012, 11:11:45 AM »

When you have time is there a date on your 346 master cylinder? I found one on my 69 Z/28 309 master but not one on  the 346. Mine has D1 or D2 on the side.

The "D1" or "D2" aren't dates - those are foundry pattern numbers from the Danville Foundry, which produced most of the master cylinder castings for Delco-Moraine.
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'69 Z/28
Fathom Green
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Mike S
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« Reply #4 on: December 23, 2012, 11:59:18 AM »

Gary,

 FWIW, both my 67's (4B & 5B) still retain their original 346 'WT' master cylinders and neither have date codes on them.
Also, Long Island Corvettes has the correct reproduction covers with the vents and wording (P/N 52-18N).
They also sell the correct steel bale wire for a lot less than others Camaro suppliers.

Merry Christmas,
Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
1968 Z28
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« Reply #5 on: December 23, 2012, 06:17:02 PM »

Mike is correct.  My "WT" master cylinder does not have a date also.  Just the "WT" letters on the front small machined surface
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
Ed Bertrand
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« Reply #6 on: December 23, 2012, 07:11:50 PM »

You may or may not find a julian date code stamped into the machined boss on the front outlet. Seems 68's only had them sporadically.

Ed
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gary
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« Reply #7 on: December 23, 2012, 09:01:43 PM »

Thanks Guys. Merry Christmas and a Happy New Year.   Gary
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69Z28-RS
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« Reply #8 on: December 24, 2012, 01:10:52 AM »

the 1969 'US' stamped master cylinders had a date code (julian) cast into the side of the MC opposite the PN.  I'd be surprised if all the D-R MC weren't similarly cast.

Gary
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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
1968 Z28
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« Reply #9 on: December 25, 2012, 01:07:21 AM »

Gary....you have a PM
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
luv2sixty9
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« Reply #10 on: September 02, 2014, 05:02:22 PM »

I have two original 346 Master Cylinders with the "WT" stamping. None have a Julian Date Code.

- The first MC has the backwards casted 346 part number and it has the SAE J1703 Lid

- The second one has the normal casted part number and has the same lid pictured above.

I'm assuming the backward 346 MC with the J1703 lid is for a verly late 68 Z28
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1967 Z/28 Butternut Yellow
1969 Z/28 Rally Green
1969 RS Z/28 Lemans Blue
1969 RS Z/28 Olympic Gold
1969 RS SS Pace Car
2010 Aqua Blue 2SS RS
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