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Author Topic:   Brake Problem
Dirt Roller

Total posts: 25
posted August 18, 2002 10:59 PM
I have had good brakes all year, except for the last 4 races, the car is a 76 Monte Carlo weighs 3650, and the rules say stock brakes only. The brakes work good when not under racing conditions, but when racing the pedal goes to the floor going into every turn. I put a new master cyl. on, but that did not help. We bled a 32 onz. bottle of brake fluid so we know there is no air in the system after they were bled and there are no external leaks. We bled them again after the heat race and all were good except the LF had some air in it and the fluid looked thinner and had a murky look to it, could it be a caliper or brake hose problem? Thanks for your help!

Dirt Administrator

Total posts: 5556
posted August 19, 2002 02:11 AM UIN: 16262997
Make sure it isnt close to a header or anything that could heat it up and make it boil.


Dirt Newbie

Total posts: 1
posted August 20, 2002 06:09 PM
No brakes at all? or just losing power assist. If its the latter, then its probably a vacuum leak. check the valve that connects to the power assist thing.


Dirt Roller

Total posts: 18
posted August 21, 2002 10:02 AM
yeah I would say check all the vacuum lines for cracks. It is confusing to me though because, on two different occasions, the vacuum hose came off and the brakes became rock solid, then another night my booster just went out and the brakes became rock solid again. So I don't what would cause a mushy pedal.

Dirt Full Roller

Total posts: 30
posted August 21, 2002 07:51 PM
Sounds like you need to replace the Booster its self. With the Car off and in Neutral Pump up the Brakes till pedal is Hard. Then Start Car and see how much the pedal falls while applying pressure to pedal while starting car and running. If it falls alot the booster needs replacing

[This message has been edited by Radrcr869 (edited August 21, 2002).]

Dirt Roller

Total posts: 25
posted August 25, 2002 03:55 PM
They are manual brakes-would it be better to use power brakes?

Dirt Roller

Total posts: 6
posted August 26, 2002 03:58 PM
if you have drums on the rear have you checked them to make sure the adjustment is right.i had the same problem and did everything you did and the drums were so far gone i had to get new ones

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