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Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Chi2 ()
Date: March 10, 2022 02:23PM

Hi Folks,

I had a CU dual master brake cylinder kit and the MC went bad. I would like to replace the MC and not have to re-plumb all the lines.

Does anyone know what model MC Lon sold in his kit?

Thanks.

Jon
-1964 Greenbrier "The Dog Hauler" Rustoleum Charmer 110hp/4sp/.030 over/Pertronics I/Isky 270 Cam
-1962 Monza Club Coupe "Shaken, not stirred" Tuxedo Black with Red Interior 140hp/4sp/Pertronics I/Clark's 260 Cam

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Marco_a_p ()
Date: March 10, 2022 02:36PM

Rebuild what you have?
Its a common kit.

Marco
A 2nd Gen Monza Wagon, a 2nd Gen GB 8door, a 2nd Gen (61's were 1st Gen) R/s and a 62nd Gen Turbo coupe..

Hanging out with the scorpions, king snakes, road runners, coyotes and quails In the southern desert of the silver state
Mesquite NV 89024

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Caraholic4life ()
Date: March 10, 2022 03:08PM

For some reason I seem to recall prior discussions mentioning mid 1960's Cadillac or other full size GM vehicles being an application that could be used.

Do some research and proceed with caution.
Maybe purchasing a rebuild kit as already mentioned would be a good way to go if you have the ability and inclination.

1962 95 F.C. Van
1964 Greenbrier Deluxe
1965 Monza Coupe
1965 Monza Convertible
Westminster, Maryland

MID ENG enthusiast &
prior Kelmark owner.



Edited 1 time(s). Last edit at 03/10/2022 03:09PM by Caraholic4life.

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: 63turbo ()
Date: March 10, 2022 03:42PM

Its a mid 1960's Cadillac Eldorado master cylinder.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car
Test Start#2 [www.youtube.com]



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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: RexJohnson ()
Date: March 10, 2022 05:52PM

Wasn't it a '66 Cadillac dual M/C that the Yenkos used?

RJ tools
Salem,Oregon

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: JimBrandberg ()
Date: March 10, 2022 07:58PM

I use a right side port MC on EM cars that's from a mid-60s Dodge. I can't remember the part number offhand but I posted it here before. Search "dual master cylinder" and set the time to all dates. I started using that one because way back someone told me that's what Lon used. I hate to disagree with the Cadillac thing but that's my story.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: toms73novass ()
Date: March 11, 2022 03:13AM

JimBrandberg Wrote:
-------------------------------------------------------
> I use a right side port MC on EM cars that's from a mid-60s Dodge. I can't remember the part number offhand but I posted it here before. Search "dual master cylinder" and set the time to all dates. I started using that one because way back someone told me that's what Lon used. I hate to disagree with the Cadillac thing but that's my story.

Jim, I use these and work well for right exit. Raybestos MC36237

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
62' Wagon rebuild MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block (Sold)
86' BMW 325es
67' UltraVan 211 "Violet"
NFCC, UMCC
Grand Island, NY

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Lane66m ()
Date: March 11, 2022 03:20AM

65 - 67 Cadillac had right side ports. Be careful some 67 Cadillac MCs have left side ports.


He can't buy a kit without knowing the unit's part number. All kits are not the same due to bore. Dorman has different kits all based on part number of master cylinder. He could get a kit # from dorman.com after he gets MC off and disassembled to find out bore size. Housing number could give him a lead on part number of the unit.



Edited 2 time(s). Last edit at 03/11/2022 03:27AM by Lane66m.

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Lane66m ()
Date: March 11, 2022 03:36AM

Here is the Dorman site for the 65 Cadillac MC. It might help in determing if that is what you have.

I know he liked Cadillac products since that is what the disc brake kit he sold wss based on.

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: JimBrandberg ()
Date: March 11, 2022 11:21AM

Yes I use the Raybestos MC36237 like Tom said.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: scottymac ()
Date: March 11, 2022 05:35PM

Not sure if this is what you're hoping to find, this was in my notes as the Cadillac m.c. used on Yenkos, I have no verification. I bought a duplicate from O'Reilly's under their brand BrakeBest, part number 10-1264. It's still in the box, holding my breath, made in China.

Scott
Danville, In.
'65 Corsa coupe basket case
'66 Monza coupe


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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: Chi2 ()
Date: March 11, 2022 06:30PM

Thanks for all the help on this. The Raybestos MC36237 was a match to the one I had and was easy to source at a local store.

Jon
-1964 Greenbrier "The Dog Hauler" Rustoleum Charmer 110hp/4sp/.030 over/Pertronics I/Isky 270 Cam
-1962 Monza Club Coupe "Shaken, not stirred" Tuxedo Black with Red Interior 140hp/4sp/Pertronics I/Clark's 260 Cam

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: JimBrandberg ()
Date: March 11, 2022 07:35PM

The Raybestos are Made in China too but I haven't had any trouble with them.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: junkman ()
Date: March 13, 2022 09:59AM

Raybestos MC36237 application chart


AM GENERAL DJ5 1972-1973
AMERICAN MOTORS AMBASSADOR 1963-1974
AMERICAN MOTORS AMERICAN 1964-1968
AMERICAN MOTORS AMX 1968-1970
AMERICAN MOTORS CLASSIC 1963-1966
AMERICAN MOTORS GREMLIN 1970-1976
AMERICAN MOTORS HORNET 1970-1976
AMERICAN MOTORS HURST SC/RAMBLER 1969
AMERICAN MOTORS JAVELIN 1968-1973
AMERICAN MOTORS MARLIN 1965-1967
AMERICAN MOTORS MATADOR 1971-1974
AMERICAN MOTORS PACER 1975-1976
AMERICAN MOTORS RAMBLER 1969
AMERICAN MOTORS REBEL 1966-1970
AMERICAN MOTORS ROGUE 1966
JEEP CJ5 1972-1975
JEEP CJ6 1972-1975
JEEP COMMANDO 1967-1973
JEEP DJ5 1972-1973
JEEP GLADIATOR 1967-1969
JEEP J-100 1971-1973
JEEP J-2500 1967-1973
JEEP J-2600 1967-1973
JEEP J-2700 1967-1970
JEEP J-2800 1967-1968
JEEP J-3500 1967-1970
JEEP J-3600 1967-1970
JEEP J-3700 1967-1970
JEEP J-3800 1967-1970
JEEP J-4500 1973
JEEP J-4600 1973
JEEP J-4700 1973
JEEP J-4800 1973
JEEP JEEPSTER 1967-1971
JEEP WAGONEER 1966-1973

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Re: Corvair Underground Dual Master Cylinder REPLACEMENT
Posted by: JimBrandberg ()
Date: March 14, 2022 06:28AM

The chart seems odd to me. I've always thought the MC36237 was from a 60s Dodge with drum brakes. I would expect something in the 70s to be disc/drum.

As long as I have my book out I use:
MC36237 right side for EMs.
MC36233 left side for LMs because there's less room to get the turn accomplished.
MC36367 is supposed to be a left side Corvette with drum brakes that has bigger reservoirs but I've never used one.
I think there all have a 1" bore.

My LM picture is here and EM picture is above.

Jim Brandberg
Isanti, MN
CorvairRepair.com






Edited 1 time(s). Last edit at 03/14/2022 06:29AM by JimBrandberg.

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