1990 Jaguar XJ6 Logo
Anonymous Posted on Oct 24, 2009

My son's car is out of fluid. no resistance at

My son's car is out of brake fluid. no resistance at the pedal. can I just add fluid and pump brakes to get fluid back in the lines, or do I need to do more than that?

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Richard Finch

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  • Posted on Oct 24, 2009
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If there is no fluid you have a leak. The first thing you have to do is find the leak and rectify the problem before refilling the master cylinder with fluid and bleeding the brake system.
The most likely cause of a leak on the 1990 Jag would be either a flexible hose or the brake servo diaphragm has a pin hole in it.
If you see any white/pale blue smoke coming from the exhaust when the engine is running it is most likely the brake servo diaphragm. This year of Jag was fitted with disk brakes all around and calipers are unlikely to leak.

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  • Posted on Oct 24, 2009
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No, there will be too much air trapped in the lines. The pedal may firm up, but will loosen later, creating a dangerous situation. The brakes will need completely "bled". Do a google search for bleeding brakes. It's too complicated to explain here (not very hard, but lots of steps).

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Brake bleeding sequence

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I have a 2004 Land cruiser and changed the right rear brake cyl and brake shoes . What is the proper procedure to bleed the rear brake system. Thank you for your help.

  1. Check the fluid level in the reservoir after bleeding each wheel. Add DOT3 fluid, if necessary.
  2. If the master cylinder was disassembled or if the reservoir becomes empty, bleed the air from the master cylinder as follows:
    1. Disconnect the brake lines from the master cylinder.
    2. Slowly depress the brake pedal and hold it.
    3. Block off the outlet plug with your finger, and release the brake pedal.
    4. Repeat 3 or 4 times.

  3. Bleed the brake starting with the one furthest from the reservoir and then the next furthest, etc.
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My brakes feel spongy when i brake. when i pump the brakes with the car not running after 3 or 4 pumps the pedal feels firm but when i start the car the pedal goes to the floor

1.Check the brake fluid under the hood ,and if its low ,add more .
2.If its not that, look under the car to see if you have any brake fluid leaks,main areas to look is
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How to bleed brakes on a 1992 Chevy Caprice. Specifically the rear drums

start from the fartherest place from brake master cylinder, that will be the rear passenger side wheel. it takes two people to bleed brakes. you will find the bleeder valve screws at the top of inside of the rear drums on both rear wheels, have someone pump the brakes up, will take at least 4 pumps of brake pedal, at 4th pump keep pressure on pedal while you break loose the bleeder valve on the rear wheel, fluid will come out and brake pedal will go down to floor, keep pressure on brake pedal until you've tightened the bleeder screw back [note] you'll only have to back the bleeder valve out about a half turn until you see the fluid come out. after you've done the rear brakes add brake fluid to the master cylinder as it will be low. then go to the front passeger side and you will find the bleeder screw on the brake caliper. repeat the same proceedure as back. remember that pressure on the pedal is a must until you've tightened those bleeder valve screws back or else it will **** air into the brake system. suggest that you bleed all 4 wheels not just the back. after you've bled the front make sure you add more brake fluid back to the master cylinder, it will be low again. hope this helps and thank you for choosing fixya.com
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Brake fluid is not going thru on new calipers. got new calipers from napa not dealer.

did u bleed the brakes ? there could be an air bubble causing blockage
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What is the sequence to bleed the brakes on a 1994 Chevy Suburban?

Bleeding the Brakes
EXCEPT HYDRO-BOOST OR ABS(see Figures 1, 2, 3 and 4)
To bleed the brakes on a vehicle equipped with ABS, please refer to the ABS bleeding procedure in this section.
The brake system must be bled when any brake line is disconnected or there is air in the system.
Never bleed a wheel cylinder when a drum is removed.
  1. Clean the master cylinder of excess dirt and remove the cylinder cover and the diaphragm.
  2. Fill the master cylinder to the proper level. Check the fluid level periodically during the bleeding process and replenish it as necessary. Do not allow the master cylinder to run dry, or you will have to start over.
  3. Before opening any of the bleeder screws, you may want to give each one a shot of penetrating solvent. This reduces the possibility of breakage when they are unscrewed.
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Fig. 1: Connect one end of a clear plastic tube to the bleeder screw and submerge the other end in clean brake fluid

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Fig. 2: Have an assistant pump, then hold in the brake pedal, while you bleed each wheel

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Fig. 3: Using the combination valve depressor-R/V Series

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Fig. 4: Using the combination valve depressor-C/K Series
  1. Attach a length of vinyl hose to the bleeder screw of the brake to be bled. Insert the other end of the hose into a clear jar half full of clean brake fluid, so that the end of the hose is beneath the level of fluid. The correct sequence for bleeding is to work from the brake farthest from the master cylinder to the one closest; right rear, left rear, right front, left front.
  2. The combination valve must be held open during the bleeding process. A clip, tape, or other similar tool (or an assistant) will hold the metering pin in.
  3. Depress and release the brake pedal three or four times to exhaust any residual vacuum.
  4. Have an assistant push down on the brake pedal and hold it down. Open the bleeder valve slightly. As the pedal reaches the end of its travel, close the bleeder screw and release the brake pedal. Repeat this process until no air bubbles are visible in the expelled fluid.
Make sure your assistant presses the brake pedal to the floor slowly. Pressing too fast will cause air bubbles to form in the fluid.
  1. Repeat this procedure at each of the brakes. Remember to check the master cylinder level occasionally. Use only fresh fluid to refill the master cylinder, not the stuff bled from the system.
  2. When the bleeding process is complete, refill the master cylinder, install its cover and diaphragm, and discard the fluid bled from the brake system.
HYDRO-BOOSTThe system should be bled whenever the booster is removed and installed.
  1. Fill the power steering pump until the fluid level is at the base of the pump reservoir neck. Disconnect the battery lead from the distributor.
Remove the electrical lead to the fuel solenoid terminal on the injection pump before cranking the engine.
  1. Jack up the front of the car, turn the wheels all the way to the left, and crank the engine for a few seconds.
  2. Check steering pump fluid level. If necessary, add fluid to the "ADD" mark on the dipstick.
  3. Lower the car, connect the battery lead, and start the engine. Check fluid level and add fluid to the "ADD" mark, as necessary. With the engine running, turn the wheels from side to side to bleed air from the system. Make sure that the fluid level stays above the internal pump casting.
  4. The Hydro-Boost system should now be fully bled. If the fluid is foaming after bleeding, stop the engine, let the system set for one hour, then repeat the second part of Step 4.
The preceding procedures should be effective in removing the excess air from the system, however sometimes air may still remain trapped. When this happens the booster may make a gulping noise when the brake is applied. Lightly pumping the brake pedal with the engine running should cause this noise to disappear. After the noise stops, check the pump fluid level and add as necessary.


Hope helps with this (remember comment and rated this).
0helpful
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97 civic ex MT clutch "flops", very little resistance

check the brake and clutch fluid resiviors.
if low add dot3 brake fluid.
but if sounds like the clutch is done.
about $800 to replace .
1helpful
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How do I add brake fluid?

pump brakes up and hold. have someone fill up resovouir. put top on and release brakes.
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