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Mod | | | Forums66 Topics128,169 Posts1,057,033 Members48,458 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: May 2015 Posts: 11,142 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,142 | The brake pedal going to the floor usually indicates that the master cylinder is leaking internally (bad cup seal). It could also be a leak somewhere in the system.
Your motor bogging down when the brakes are applied could mean that the vacuum booster is leaking, but could be something else. Compare the brake effectiveness with the engine off with engine on. If there isn't much difference, a leaking vacuum diaphragm in the booster could be the issue. With the engine off, pump the pedal till it gets firm, then hold it and start the engine, if the pedal goes toward the floor (but not all the way down) then the booster is working as it should.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | |
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