67 Master Cylinder #

[Terry Schimmel]

I have an early 67, M20, non power brakes with, I THINK, the following on the right side of the Master Cylinder M181?? MADE IN USA. It may be M1818? MADE IN USA. The numbers are small and hard to read. The numbers and words are all in one straight line. It does have the two bleeders, no DC stamp. I didn't see any other stampings or marks. The cap is wrong and I am wondering if the unit is wrong also. The JM calls for 5455509 and states some units did not have the DC stamp. Thanks

[Richard J.]

Re: 67 Master Cylinder #

Hi, It sounds like you have a rebuilt unit not of Corvette vintage. The 1967 Corvette, power or non-power used a casting number ending in "509" and had the dc stamp on the front. There is also a small date stamp in the very front of the master, under the "DC" area that is usually very hard to see and read. If you are looking for correct the "509" is the only one that I have ever heard of that would be correct, power brakes or not. I hope that helps you some.

[Joe L.]

Re: 67 Master Cylinder #

Terry and Rick-----

All 1967 Corvettes EXCEPT those equipped with the J-56 HD brake system used the GM #5455509 casting master cylinder. J-56 used the GM casting #5460346.

The master cylinder which Terry described is a SERVICE replacement master cylinder. It may be a Delco unit but, if so, it's from the era after Delco-Moraine ceased producing these and the manufacture was "farmed out" and "consolidated" with another manufacturer like Wagner, Bendix or Raybestos (identical master cylinders will be found in their boxes).