Failed Brake Booster
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Fleet Mechanic
Joined: Feb 2007
Posts: 1,252
Likes: 113
From: Mandan, ND
Failed Brake Booster
So...I installed the Classic Performance Products Master/Booster/Porp Valve combo on the F-250 last spring. About 2,000 miles ago. Booster failed. You can hear it hiss when shutting off the engine.
Ordered a different 8" dual diaphragm "hot rod" booster from Summit. Perhaps this will be better.
Wondering why it would fail? Check valve was good and installed. Vacuum is good at idle, maybe it is still not enough? But even if vacuum was low, why would the booster fail, in a way that draws air in? If you had a lack of vacuum, you would just get a hard pedal, not rupture of the diaphragm. ?
Chris
Ordered a different 8" dual diaphragm "hot rod" booster from Summit. Perhaps this will be better.
Wondering why it would fail? Check valve was good and installed. Vacuum is good at idle, maybe it is still not enough? But even if vacuum was low, why would the booster fail, in a way that draws air in? If you had a lack of vacuum, you would just get a hard pedal, not rupture of the diaphragm. ?
Chris
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Fleet Mechanic
Joined: Feb 2007
Posts: 1,252
Likes: 113
From: Mandan, ND
No, I don't know where it is leaking. I swapped it with the new one tonight and "holy crap" the brakes never felt that good, even when the other booster was brand new!
The old one is on the bench now, and I will fiddle with it to see what is what...
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Fleet Mechanic
Joined: Feb 2007
Posts: 1,252
Likes: 113
From: Mandan, ND
CPP wanted $179 plus shipping for the same booster.
The mystery is what these boosters are based off of. What I mean is they must be based of a OEM unit. If I solve that puzzle, will post here. That would allow people to obtain boosters from NAPA or the like...
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weezer4117
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