![]() |
|
|||||||
| Forums | Gallery | Encyclopedia | Tech | Olds Junction | Register | FAQ | Members List | Calendar | Search | Today's Posts | Mark Forums Read |
![]() |
|
|
Thread Tools | Display Modes |
|
|
#1 (permalink) |
|
New 1954 Olds 88 owner!
Join Date: Aug 2007
Location: Illinois
Posts: 49
|
I have a '54 olds 88 with the treadlevac master cylinder. I've been trying to bleed the brakes, but I cannot seem to get the air out of the lines. I spent about two hours yesterday evening bleeding at each wheel, but all I seem to get is air with just a dribble of brake fluid.
There are no fluids leaks, and I made sure the master cylinder was kept full of fluid. There is fair pressure at the two front wheels (you can see the pulse of air whenever the pedal is pushed), but only a little at the two rears. Either way, no matter how many times I've tried, all I get is air. I'm kinda stumped here, so if anyone has any idea what I should check next, I would appreciate it! |
|
|
|
| Sponsored Links |
|
|
|
|
#2 (permalink) |
|
Senior Member
Join Date: Jan 2007
Location: Portland, OR
Posts: 225
|
I've been using a vacuum bleeder like Mity-Vac. When I changed the rearend on my 66 I vacuum bleed the rear brakes. Then bleed them normal about twice each wheel 'cause I wanted to be sure. No issues with the brakes since. And it only took about 30 minutes. Plus the rear was out of the car about 3 weeks, with the line plugged.
Don |
|
|
|
|
|
#3 (permalink) |
|
New 1954 Olds 88 owner!
Join Date: Aug 2007
Location: Illinois
Posts: 49
|
Could there be anything wrong with the master cylinder that would cause it to pump air and not brake fluid? I've heard recommendations that the master cylinder should be bled, but I didn't see a place on the treadle vac where you could do that.
|
|
|
|
|
|
#4 (permalink) |
|
Senior Member
Join Date: Oct 2007
Location: west
Posts: 212
|
I'd say your sucking air from somewhere, if you pump up the brake pedal, does it go anything but to the floor? If it will not pump up after opening the blled valves with pressure on the brake pedal, I'd say look at all the wheel cylinders, if you have a leak there you will know it. Vaccum bleeders have been around a long time, but I still like the manul bleed with two guys and pumping the brake pedal.
|
|
|
|
|
|
#5 (permalink) |
|
Senior Member
Join Date: Oct 2007
Location: west
Posts: 212
|
One other thing, if you are holding the brake pedal down to the floor after the bleed valve is shut, and still having this problem, could be a bleeder valve not closing off. Also could be a master cylinder bleeding fron the front to bake brake or vise versa internally. But you say you are having air, so I'd look at either wheel cylinders or bleeder valve.
|
|
|
|
|
|
#6 (permalink) | |
|
Junior Member
Join Date: Oct 2004
Location: Southern CA
Posts: 751
|
Quote:
Norm
__________________
I love the reaction when they find out it's not a Big Block Chev . . . . . . . It gets even better when they find it's all Olds. |
|
|
|
|
|
|
#7 (permalink) |
|
Senior Member
|
Had the same problem with my 54 I put new bleeders in slid a hose over them & pulled a vac with my AC vac pump still took forever
|
|
|
|
|
|
#8 (permalink) |
|
New 1954 Olds 88 owner!
Join Date: Aug 2007
Location: Illinois
Posts: 49
|
I think I'll try a Mity-Vac and see if I can force the fluid through the lines. When you pressurize the master cylinder, should you have the brake pedal depressed?
|
|
|
|
|
|
#9 (permalink) |
|
Senior Member
Join Date: Jan 2007
Location: Portland, OR
Posts: 225
|
It's vacuum, it attaches to the other end on the bleeder. I leave the cap off the master, check the bleeder to make sure it's not too tight, attach the vacuum hose to the bleeder (w/ adapter), pump the vacuum up and slowly open the bleeder. I get air, then fluid & air and finally just fluid. Tighten the bleeder before removing the hose. Check the fluid level in the master cyclinder then go to the next wheel.
I usually don't have to do anything to the pedal while I do this. Put it sounds like this particular system may be tricky. You might have someone at the pedal while you do the vacuum bleed. Maybe try light pressure and release or "Slowly" pumping, but not too much pressure on the pedal. I always bleed each wheel the old fashion way, usually right after I vac. bleed each. You asked about bench bleeding the master cyclinder on the car. What I done before is have someone pump and hold pressure on the pedal, then loosen the brake line at the master cyclinder, repeat till you have good fluid flow. But remember, brake fluid removes most paints. Maybe have a shop rag or something over your hand & wrench as you try this. Don |
|
|
|
![]() |
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| convertable hydrolic lines | dynamic88 | Brakes/Hydraulic Systems | 3 | 08-02-2007 08:52 PM |
| vacuum lines | terribleonexx88 | Small Blocks | 8 | 03-16-2007 12:00 PM |
| Air cleaner vacuum lines | Chumley | Cutlass | 5 | 01-03-2007 06:08 PM |
| Air in Brake Lines for 67 Cutlass Holiday | olds01 | Brakes/Hydraulic Systems | 3 | 08-11-2006 08:35 AM |
| vac lines | <zeke> | Other | 1 | 08-07-2004 09:09 PM |