Question about a bad brake booster
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 3,305
Likes: 2
From: Havelock NC
Question about a bad brake booster
On all of the threads about bad brake boosters I searched, they referenced a hissing sound coming from under the dash. Is this sound only when you are pressing the pedal or is it constant. I have a whooshing sound whenever I push the pedal and it seems that I'm not getting much power brake. I can't even get the anti lock to engage when I slam on brakes as hard as I can. Doesn't this seem pretty indicative of a bad booster?
Corvette Enthusiast
Joined: Oct 2007
Posts: 6,797
Likes: 2,721
From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
2024 C7 of the Year Finalist - Unmodified
2023 C7 of the Year Finalist - Unmodified
booster
My experiences with bad boosters. Generally they crack down by the exhaust manifold. I have always changed them out. But recently, some one posted here that they have patched the cracks on them with an epoxy resin. If it works, its going to be my new approach to repairing them first. I have changed a few, and its a challenge.
Corvette Mike
Corvette Mike
Le Mans Master
Joined: Feb 1999
Posts: 9,938
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
My experiences with bad boosters. Generally they crack down by the exhaust manifold. I have always changed them out. But recently, some one posted here that they have patched the cracks on them with an epoxy resin. If it works, its going to be my new approach to repairing them first. I have changed a few, and its a challenge.
Corvette Mike
Corvette Mike
You can see the heat barrier wrapped around my booster. Not the best shot, but it works. It dropped 250 degrees of heat on booster.
And the material used, standard heat barrier for HIGH HEAT steam pipes, for example.
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
Lately mine has been making the hiss but only during the first few minutes of driving, doesnt want to brake well either. Then sometimes it brakes just power like it has plenty of power, still a bad booster?
