Brakes
Thread Starter
Instructor
Joined: Sep 2020
Posts: 121
Likes: 9
Brakes
Being the highly trained mechanic that I am I took it upon myself to change out a bad caliper and honestly I did a incredible job BUT I started with a great pedal to now a soft pedal. I pumped the brake multiple times and had a solid fluid line but still not much of a pedal. I do see some fluid leak between the booster and master cylinder. any thoughts?
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Don't touch the pedal. C3s don't like that.
Bleeding methods differ, but pressure tank, gravity method are more favorable.
If you are only doing one caliper, a vacuum hand pump is your best bet.
Sounds like you need a new master. Piston seal at the rear of the unit is weeping into the booster.
Bleeding methods differ, but pressure tank, gravity method are more favorable.
If you are only doing one caliper, a vacuum hand pump is your best bet.
Sounds like you need a new master. Piston seal at the rear of the unit is weeping into the booster.
Le Mans Master
Joined: Aug 2005
Posts: 6,539
Likes: 1,972
From: Temple Terrace Florida
I agree. Sounds like you need a new master. You can rebuild your own in no time with a kit. You can also get a rebuilt one from Rock Auto or other store like NAPA. Make sure the depth of the piston in the back of the master is the same as the one you have. Don't forget to bench bleed the MC. Jerry
Race Director
Joined: Nov 2006
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
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Cruise-In VIII Veteran
Fluid leak at the back of the master certainly doesn't sound good. I'd be pulling that and inspecting.
if the bore is still good a kit will fix it up quickly.
If the bore is less than perfect it can be sleeved but likely far cheaper to just pick up a new or rebuilt unit.
if the bore is still good a kit will fix it up quickly.
If the bore is less than perfect it can be sleeved but likely far cheaper to just pick up a new or rebuilt unit.
