2001 s 10 breaks

Asked by dozer2318 Jun 16, 2018 at 10:17 PM about the Chevrolet S-10

Question type: Maintenance & Repair

i replaced the master cylinder calipers and breaks on my 2001 s10 i didnt
replace the resevor but there doesnt seem to be a leak. i sprayed the vacume
line and fitting to the break booster, no leaks.

3 Answers

103,455

What is the question then? If you're having a problem like a soft pedal after replacing a MC, just know those should be bench bled before installed.

What do you mean bench bleed. I've just always done em on the vehicle. The question is, why won't the breaks "pump up"?

103,455

The booster isn't going to affect hydraulic pressure in the MC, you should be able to pump the brakes up even with the engine off and no assist from the booster. So either you have a bad MC (piston) or a lot of air trapped in the line or a leak. You'd know if you had a leak so look at the other two options. If you skip bench bleeding the MC, then air in it needs to be bled all the way out of the lines, all 20 or so feet. The MC should have come with a kit for bench bleeding. I know some backyard mechanics will try to shortcut the process by bleeding the MC after installing it by loosening each line, but that creates a mess (and brake fluid is corrosive to paint) and has continued risk of getting air into lines. The other problem with bleeding a MC on the car is it needs to be level, and that's not really feasible. Only three things can cause a pedal to go to the floor - a leak, air in the system, and a bad/worn MC.

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