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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: k10Ryan79 on February 28, 2017, 12:25:47 pm

Title: Brake fluid leaks from top of master cylinder reservoir- New parts
Post by: k10Ryan79 on February 28, 2017, 12:25:47 pm

So here's my issue. I just replaced my Master Cylinder and booster but when I drive it, it leaks from the cap... I did see the even with the clamp on it there's still come play in the cap.. you can actually move it from side to side and forward to back.. Shouldn't there be no play at all in the cap?

Title: Re: Brake fluid leaks from top of master cylinder reservoir- New parts
Post by: Rapid Roy on February 28, 2017, 01:42:45 pm

Sounds like the rubber seal in the lid may be missing. Or maybe clamp not in correct position to clamp snug to prevent leaking.

Title: Re: Brake fluid leaks from top of master cylinder reservoir- New parts
Post by: Irish_Alley on March 01, 2017, 04:33:54 pm

try your old cap and see what it does. there should be NO moment when the clamp is in place. and i know ive had an issue years ago with the gasket. but with a new master you shouldnt have that issue. if your old cap fixes the issue i would go back to the parts store. they should be willing to work with you (cause of a defective part) and give you a new gasket or something

Title: Re: Brake fluid leaks from top of master cylinder reservoir- New parts
Post by: k10Ryan79 on March 02, 2017, 01:33:51 pm

Looks like the lid they gave me was messed up (to big). Got a different one and fixed the problem! thanks guys!