Author Topic: 69 Brake Booster Pins  (Read 235 times)

Bigfish45

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69 Brake Booster Pins
« on: June 10, 2019, 04:52:21 AM »
I bought a reproduction power disc brake booster for my 69 Camaro. It came with 2 booster to master cylinder piston pins. One short and one long. The reproduction 309 master cylinder came with a spud, stub or extension (whatever it's called) in the piston hole. The short pin and the stub measures the same length as the long pin without the stub. Why would this booster kit come with a long pin and a short pin? Which should I use, long pin without spud or short pin with the spud? Please look at attached picture.

Bigfish45

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Re: 69 Brake Booster Pins
« Reply #1 on: June 10, 2019, 04:54:17 AM »
I don't know why picture is so large. I re-sized it to 200 KB.

luv2sixty9

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Re: 69 Brake Booster Pins
« Reply #2 on: June 12, 2019, 12:33:36 AM »
Use the long one that way you wont need the short or the extension piece.
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

z28z11

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Re: 69 Brake Booster Pins
« Reply #3 on: June 12, 2019, 03:05:41 AM »
Recess in the piston (where the rod contacts the master cylinder) is different in depth between the '68 and '69 master cylinders - the WT master has a different (piston) hole depth than the US cylinder. More than a few guys have found out the hard way when replacing masters and boosters -

If you are using a rebuilt master cylinder, you can bet the piston is a '69 - up version, which should use a shorter rod. The early kits are getting pretty tough to find with the proper piston for the application(s) that use the longer rods -

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06