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Author Topic:   brake problems
Dirt Maniac

Total posts: 102
posted July 31, 2005 03:20 PM  
our brakes fade away about half way through a race get it back home pump it twice they are there again are they getting hot and boiling the fluid or what our master cylinders are mounted low do we need some of them restrictors to keep the fluid from backing up

Dirt Freak

Total posts: 270
posted August 01, 2005 08:36 AM  
Flush your brake system well and make sure the brake lines aren't near the exhaust system.Flush em a couple times a season.
It could be a combination of contaminated brake fluid (water) and heat or both.If you have ever overheated your brake fluid it is now junk.Run a good racing grade brake fluid that will tolerate higher temps and don't blast the master cylinders directly when you wash the car.Good Luck!

Dirt Full Roller

Total posts: 63
posted August 01, 2005 11:10 AM  
Have to be careful when you wash the car too. If you get any water in the brake system the fluid will boil at a much lower temperature. Need to keep a check on the fluid. If it is not clear, replace it. Use a non silicon based fluid that is rated higher than DOT3. Should have the boiling point on the label. Look for the highest boiling point.

Dirt Forum Champ
Total posts: 2007
posted August 01, 2005 11:19 AM  
WE used to change brake fluid in the middle of the season then went to every 4 or 5 weeks now we are down to bleeding them every other if not every week and have better brakes than ever. The fluid in the master cylinder may look good but the fluid in the calipers is burnt. We sill usually bleed half the master cylinder out ea time, then refill with new fluid. For now completely flush and fill the entire system then start a schedule of maintenance. That way you are continually flushing the system and keeping relatively fresh fluid in it all the time.

[This message has been edited by dirtbuster (edited August 01, 2005).]

Dirt Maniac

Total posts: 115
posted August 01, 2005 01:57 PM  
One more thing is that if you are braking with your left foot, like almost all dirt drivers, it is very easy to drag the brakes a little. If you have a well bled system without much slop even a slight pressure on the pedal will be enough to lightly drag the brakes, causing overheating. I still fight this problem occcasionally.

Dirt Maniac

Total posts: 102
posted August 01, 2005 02:56 PM  
thanks guys car only runs every two or three weeks bled them two weeks ago havent washed it all year might be the problem . ill look might be a heat problem havent check the headers

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