Power Brakes Problem :-/ HELP!
TheNakedCowboy1
02-08-2004, 06:45 PM
Howdy,
1988 Blazer K5 350 Automatic 5.7L here, I got something wrong with my Power Brakes. Yesterday I checked my brake fluid and to my surprise the front reservior was empty and the rear was on minimum. I hadn't checked it in a while so I just thought that it had eaten it up. Anyway, I filled it up and went inside. The next day I back out of the driveway and there is a puddle of brake fluid sittin there. I get underneath and the back right brake line torn in 2. I replaced that and tried the brakes, and no fluid is comming back. I thought that it was just a bad installation of the brake lines, but there aint even any fluid comming out of the master cylinder. I replaced the cylinder since it was pretty old and almost falling apart. I bled the new cylinder and there still isn't enough pressure to shoot out any fluid. I suspected I didn't get it bled good enough so I did it a 2nd and 3rd time. Still won't work. I got online and read about the Brake Booster and it gave me a test to do to see if the booster was bad or not. I go outside and do that test (turn the car off, clear the vacuum out of the booster by pumpin breaks, hold down the break, turn it on; if the pedal depresses then it is ok, if not then it is bad) and the booster is fine.
I've worked 2 days straight (about 20 hours total) on this thing and it still doesn't work. Someone help me pleaseeeee
1988 Blazer K5 350 Automatic 5.7L here, I got something wrong with my Power Brakes. Yesterday I checked my brake fluid and to my surprise the front reservior was empty and the rear was on minimum. I hadn't checked it in a while so I just thought that it had eaten it up. Anyway, I filled it up and went inside. The next day I back out of the driveway and there is a puddle of brake fluid sittin there. I get underneath and the back right brake line torn in 2. I replaced that and tried the brakes, and no fluid is comming back. I thought that it was just a bad installation of the brake lines, but there aint even any fluid comming out of the master cylinder. I replaced the cylinder since it was pretty old and almost falling apart. I bled the new cylinder and there still isn't enough pressure to shoot out any fluid. I suspected I didn't get it bled good enough so I did it a 2nd and 3rd time. Still won't work. I got online and read about the Brake Booster and it gave me a test to do to see if the booster was bad or not. I go outside and do that test (turn the car off, clear the vacuum out of the booster by pumpin breaks, hold down the break, turn it on; if the pedal depresses then it is ok, if not then it is bad) and the booster is fine.
I've worked 2 days straight (about 20 hours total) on this thing and it still doesn't work. Someone help me pleaseeeee
TheNakedCowboy1
02-08-2004, 07:21 PM
Ok so I have looked it over and ran some tests, and me and my compadres think that it is the rod that goes from the brake booster to the master cylinder. The one on my truck is flat on the end that goes into the master cylinder. I have looked at several pictures and they all seem to have a ridge or a nipple of some sort on the end of the rod. I wonder if mine has been somehow sheared or broken off. Could someone please educate me as to what the end of the rod is supposed to look like on the stock 88 blazer brake booster rods? That would be great I think that is what the problem is.
Automotive Network, Inc., Copyright ©2026