Okay I have a 1978 GMC sierra heavy half 1500. I checked my break fluid a few weeks ago and it was low in the back chamber so I added some. well this morning I checked it again and it was low again in the back chamber. when i added fluid the first time the back breaks started locking in better and the front was not effected.
I checked it because the back were getting weak again. There are no leaks on anything. I cant figure out why the master cylinder is low let alone where it is going.
I have a strong pedal all the time. i just want to know why and where it is going. could the master cylinder be bad? or could there be a super slow leak somewhere?
2007-01-21 09:26:54 · 5 answers · asked by JaySy 1 in Cars & Transportation ➔ Maintenance & Repairs
the rear brakes started locking up like the front were when i added fluid to the master cyl but after a few weeks the front kept locking up like they should and the rear quit locking. They have just enough pressure that the truck dont do its own version of a power break. I have looked for leaks but couldn't find any. If it is a leak it must be a super slow one. There is a few wet spots on the rear axle where the brake lines are but it snowed here recently so i can't tell if it is water or brake fluid without getting under there. (too snowy on the ground right now to do it.)
2007-01-21 10:05:18 · update #1
The fluid is leaking past the rear of the piston into the brake booster. Remove the master cylinder from the booster and pull it out far enough to see behind it and it will be wet with brake fluid.
2007-01-21 10:05:48 · answer #1 · answered by eferrell01 7 · 1⤊ 0⤋
you may have a rusted steel brake line along the frame, or more likely, a leaking rear wheel cylinder. pull both rear drums, and i bet you will find the problem. if you had a leak at the master cyl, the fluid level would go down in both chambers the same. you mentioned rear brakes locking up. i bet the shoes are wet with brake fluid.
2007-01-21 09:34:54 · answer #2 · answered by Anonymous · 1⤊ 0⤋
More than likely you have a wheel cylinder leaking on the rear... look on the inside of your rear tires...you should see some signs of fluid...
2007-01-21 09:33:45 · answer #3 · answered by Anonymous · 1⤊ 0⤋
well engine coolant doesn't matter much sometimes the radiator itself has issues. I own a 85 chevy and the radiator had to be replaced 2 years ago. the engine oil should be 10w 40 and for the oil filter look at walmarts extended guard line or equivalent.
2016-05-24 08:19:17 · answer #4 · answered by Anonymous · 0⤊ 0⤋
sounds like the master cyl has a leak can be hard to see .
2007-01-21 09:31:48 · answer #5 · answered by robo.1 2 · 0⤊ 0⤋