i have changed the master cylinder, the sevo unit, bled the brakes, adjusted up the back shoes and still the brake pedal is utter crap. please im at the end of my tether!!!!!
2007-07-29 07:21:08 · 9 answers · asked by kevroyburns 2 in Cars & Transportation ➔ Maintenance & Repairs
In the trade we use a pressure bleeder,This screws on top of
the master cylinder and pumps a few pounds pressure on the fluid, Then you open the back bleeder till clear of air,Then do the front too, You can get a cheep diy one at Halfords.
KEN mechanic
2007-07-29 14:46:47 · answer #1 · answered by KEN W1953 2 · 1⤊ 0⤋
Firstly,with the front wheels off,see to it that the brake pads are free to move on the pins,and if they are free,remove them one at a time and ensure the calipher pistons are free Note one at a time If ok check the rear self adjusters are staying on the ratchet. This means adjust a small bit at a time until the drums slide on.Next slacken the pipes on the master cyllinder only slightly and watch.you may see air bubbles coming through so wait til you think its clear,making sure of course to keep the master cyl full.when you bleed the system use a tube and bottle,making sure the bottle is at least one eighth full,start with the closest to the master cyl and bleed brakes until no air is blowing back into the bottle. If this fails was it a new master cyl etc All the best
2007-07-29 08:35:04 · answer #2 · answered by Anonymous · 1⤊ 0⤋
You still have air in the system . Start furtherest from the master cyl, open each bleeder and let gravity push the fluid out until it runs clear,then bleed as normal but before this bleed the master cyl on the brake pipe union
2007-07-29 07:50:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋
is it using fluid, could be the piston seals, check the discs for any buckles or warps and thickness, was there a lip round the back drum, if so correct adjustment wont be achieved till this is removed, there will also be a block where all the pipes meet these can get blocked if a flexi hose or seal is breaking down, i take it you checked the flexis, you could try blanking each wheel off in turn and bleeding the brakes to see which one looses pressure,laboursome but productive,g,luck
2007-07-29 07:35:03 · answer #4 · answered by slowlaner 2 · 1⤊ 0⤋
ok i suggest you rebleed the brakes and check for leaks on the master cylinder are the pistons operating properly,is there any leaks on the brake pipes????check the universal joints
after that scream as i wont know best of luck
2007-07-29 07:34:42 · answer #5 · answered by mickyboy 1 · 1⤊ 0⤋
the only thing left to look for now is a split brake pipe or loose union because failing all you have tried there must be a leak.
2007-07-29 10:05:44 · answer #6 · answered by maclaren 4 · 1⤊ 0⤋
Did you bench bleed the master cylinder before installing it?
ADDED:
Re-bleed the entire system.
2007-07-29 07:27:55 · answer #7 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
bad brake hoses
2007-07-29 07:26:20 · answer #8 · answered by dave l 2 · 0⤊ 0⤋
Doesn't sound like you have bled the system properly to me- i would do it again.
2007-07-29 09:08:40 · answer #9 · answered by Ellie 6 · 1⤊ 0⤋