Topic: Master Cylinder Brass Fittings

[1970 Snake]

After review of my disassembly pictures I see my car had a master cylinder which has brass fittings between the brake lines and cylinder and the cap is plated yellow zinc.
I have always assumed it has been replaced at some point during the first 18 years of the cars life, but I have recently notice another high end restoration with the same brass fittings and same yellow zinc cap. Can any one shed some light on this finding, the master cylinder does have the dimple over the front line outlet, but does not have the special screw in the bottom.

[Bob Gaines]

After review of my disassembly pictures I see my car had a master cylinder which has brass fittings between the brake lines and cylinder and the cap is plated yellow zinc.
I have always assumed it has been replaced at some point during the first 18 years of the cars life, but I have recently notice another high end restoration with the same brass fittings and same yellow zinc cap. Can any one shed some light on this finding, the master cylinder does have the dimple over the front line outlet, but does not have the special screw in the bottom.

2227091 is for a Boss 9 . 2227161 is for a 428 .the 428 does not have the brass fittings . Without the stop bolt would indicate it was a later service replacement.

[Bob Gaines]

2227091 is for a Boss 9 . 2227161 is for a 428 .the 428 does not have the brass fittings .

The lids went from zinc gold prior to 68 to zinc silver in 68 and after. Also the lids are different with raised lettering starting in late fall of 68 on up . The lid you have is used on 67 - very early 69 production.

[7Lscjracer]

http://anghelrestorations.com/uploads/3/5/1/2/35122002/master_cylinder_caps_1.5.pdf

Marcus's article discusses the caps indepth.

[1970 Snake]

So these replies are leaving me a bit confused but my take away is that my car had a service replacement master cylinder install which looks to be for a Boss 429 and this cylinder is an early 69 or earlier master cylinder. My car is an early 1970 is there any chance this master cylinder was install on the assembly line, as I just don't get a Boss 429 master cylinder being placed on the car later in its life. The attached disassembly pictures are of it in my car.

[67gtasanjose]

So these replies are leaving me a bit confused but my take away is that my car had a service replacement master cylinder install which looks to be for a Boss 429 and this cylinder is an early 69 or earlier master cylinder. My car is an early 1970 is there any chance this master cylinder was install on the assembly line, as I just don't get a Boss 429 master cylinder being placed on the car later in its life. The attached pictures are of it in my car.

You might keep in mind that the casting was used on other vehicles Ford produced than just the Boss 429 Mustang. Bendix also supplied  Master cylinders  for other vehicle manufacturers than just Ford. This particular master cylinder may have had little to no value as a core for a good number of years until it was determined that the Boss 429 Mustang used this casting number then it perhaps became a little bit more valuable. Keep in mind, since this does not have the stop bolt in the bottom of it, it was more than likely a later service replacement of a multiple use application.

[Bob Gaines]

So these replies are leaving me a bit confused but my take away is that my car had a service replacement master cylinder install which looks to be for a Boss 429 and this cylinder is an early 69 or earlier master cylinder. My car is an early 1970 is there any chance this master cylinder was install on the assembly line, as I just don't get a Boss 429 master cylinder being placed on the car later in its life. The attached disassembly pictures are of it in my car.

First off it doesn't have the stop bolt and what with the wrong lid those two items indicate that not only is it a later service replacement but given the lid it is most likely a rebuilt service replacement unit on top of all of that. I suppose if you prescribe to the anything is possible scenario it could be possible but in the realistic world it is very doubtful original to your car. Just my opinion .Others may have different.

[1970 Snake]

Bob I get the uneasy feeling you think I am trying to say I had a Boss 429 cylinder put on my car on the assembly line, but that is not the case at all, it was just a hypothetical question only based on my understanding of the  the comments I received regarding the part dates. I agree it would be very unlikely. I started this topic as I am simply trying to understand exactly what I own and why. So please bare with me as this is what I am understanding now.
The master cylinder is a service part with casing marks of 1970 and .2227091 and was install on the car at some point between 1970 and 1988 which is when I bought the car. The cap according to the Marcus document is a C80Z-2162-A part as it has the side vents and cross over vent which puts it as an early 1969 cap. Apparently the brass outlet fittings are inherent to this model of master cylinder and did not come factory on the 428 mustangs. How did the lid and cylinder get mated who knows, maybe a rebuilt unit. Although I am a bit puzzled as to what the odds are that say after 10 or 15 years of service the original factory units replacement was a rebuilt unit that just happens to have a 1970 casting mark and an early 1969 lid. Anyway it doesn't much matter anymore as I will probably replace it with the DNO reproduction of the 1970 master cylinder to correct whatever happened. Thanks for all the input guys very much appreciated.

[Bob Gaines]

Bob I get the uneasy feeling you think I am trying to say I had a Boss 429 cylinder put on my car on the assembly line, but that is not the case at all, it was just a hypothetical question only based on my understanding of the  the comments I received regarding the part dates. I agree it would be very unlikely. I started this topic as I am simply trying to understand exactly what I own and why. So please bare with me as this is what I am understanding now.
The master cylinder is a service part with casing marks of 1970 and .2227091 and was install on the car at some point between 1970 and 1988 which is when I bought the car. The cap according to the Marcus document is a C80Z-2162-A part as it has the side vents and cross over vent which puts it as an early 1969 cap. Apparently the brass outlet fittings are inherent to this model of master cylinder and did not come factory on the 428 mustangs. How did the lid and cylinder get mated who knows, maybe a rebuilt unit. Although I am a bit puzzled as to what the odds are that say after 10 or 15 years of service the original factory units replacement was a rebuilt unit that just happens to have a 1970 casting mark and an early 1969 lid. Anyway it doesn't much matter anymore as I will probably replace it with the DNO reproduction of the 1970 master cylinder to correct whatever happened. Thanks for all the input guys very much appreciated.

My car is an early 1970 is there any chance this master cylinder was install on the assembly line, as I just don't get a Boss 429 master cylinder being placed on the car later in its life.

I thought I was  answering your question in the context that it was asked  sorry that it gave you a uneasy feeling. The answer was instead supposed to give you information that indicates the correct type master cylinder and lid given that there was nothing about your pictured master cylinder ,lid or fittings that was original to your car .

[1970 Snake]

Thanks Bob, I have found a number of factory 69 parts/configurations on this car (very early build date), and is why I ask what may seem like a silly question from time to time.

[Bob Gaines]

Thanks Bob, I have found a number of factory 69 parts/configurations on this car (very early build date), and is why I ask what may seem like a silly question from time to time.

No worries.

[1970 Snake]

I just thought I would update my posting regarding the cap on my MC, I have put it beside the DNO 1970 reproduction, and it is pretty much identical except the lettering is not raise stamped and wording obviously different. I am still assuming this is an early 1969 because of the side vents and cross vent and word stamping.

[Bob Gaines]

I just thought I would update my posting regarding the cap on my MC, I have put it beside the DNO 1970 reproduction, and it is pretty much identical except the lettering is not raise stamped and wording obviously different. I am still assuming this is an early 1969 because of the side vents and cross vent and word stamping.

The cap without the raise lettering was used on late 67 ,68 and very early 69 . The non raised letter cap cap when used on the Mustang had a silver sticker with red lettering applied with similar details as the metal cap had stamped.  FYI although similar nether of the rubber gaskets were original to ether cap. They are replacements given the markings on each. From the outside when installed they look fine however . 

[1970 Snake]

Thanks Bob, so if I have this right you are telling me my cap is late 67 to early 69 but needs a Decal B sticker (Marcus's Document) on it even though there is stamped wording on it and the gasket is incorrect to the cap?

[Bob Gaines]

Thanks Bob, so if I have this right you are telling me my cap is late 67 to early 69 but needs a Decal B sticker (Marcus's Document) on it even though there is stamped wording on it and the gasket is incorrect to the cap?

Yes on the first part except the gasket is not original to the cap . It is correct for the application just a after market version of the original.