Help with brake booster please!
Thread Starter
Pro
Joined: Nov 2007
Posts: 617
Likes: 8
From: Morgan City LA
Help with brake booster please!
Hi fellas,
how do you know if a brake booster is going bad? this is what i got, i brought it to friends mech/shop b/c i had this aggravating squeaking noise like when you need to change the brake pads. the pads where good so the polished my rotors. the mechanic asked me if my brake pedal was always hard when braking? i got in it and it seemed normal at least to me..hehe. he said it should have more of a gradual tension as you brake harder. so i put it in drive let it roll then it the brakes think it should brake hard but instead rolled to a stop. hope i'm making sense. so....he says it may be the booster going bad. so now it got me thinking how i never noticed it before. any way to tell for sure? the fluids are full too. to make things worse there's a vette show this weekend!
thanks guys!
how do you know if a brake booster is going bad? this is what i got, i brought it to friends mech/shop b/c i had this aggravating squeaking noise like when you need to change the brake pads. the pads where good so the polished my rotors. the mechanic asked me if my brake pedal was always hard when braking? i got in it and it seemed normal at least to me..hehe. he said it should have more of a gradual tension as you brake harder. so i put it in drive let it roll then it the brakes think it should brake hard but instead rolled to a stop. hope i'm making sense. so....he says it may be the booster going bad. so now it got me thinking how i never noticed it before. any way to tell for sure? the fluids are full too. to make things worse there's a vette show this weekend!
thanks guys!
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Go to www.mbmbrakeboosters.com. Scroll over to the Tech section. Under "Faqs" select Booster. It is an excellent explanation of how a booster works. Then scroll down in the Tech section to "booster diagnostics". Tells you how to determine if your booster is working properly or not. Good luck. I hope your problem is not your booster. They arte a real PITA to replace.
Race Director
Joined: Apr 2003
Posts: 19,350
Likes: 654
From: Tampa, Florida
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Check out www.type2.com/library/brakes/vacboo.htm. also check out www.classicchevy.com/assets/pdf/brake_guide.pdf. both articles tell you how to test your booster (it's easy to do) and what you need to test it.
Pro
Joined: Jun 2004
Posts: 700
Likes: 0
From: Lantana TX
The miles wouldn't have much to do with it, the age of the car does. There is a diaphragm inside the booster that may have deteriorated due to age or a leaking master cylinder leaking brake fluid back into it. Brake fluid will destroy the boosters internals if it finds it's way inside.
Check out www.type2.com/library/brakes/vacboo.htm. also check out www.classicchevy.com/assets/pdf/brake_guide.pdf. both articles tell you how to test your booster (it's easy to do) and what you need to test it.
Check out www.type2.com/library/brakes/vacboo.htm. also check out www.classicchevy.com/assets/pdf/brake_guide.pdf. both articles tell you how to test your booster (it's easy to do) and what you need to test it.
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