Question about 1984 Nissan Pickup

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Is there supposed to be a gasket between the brake cylinder and the brake booster?

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No gasket is required. if it is leaking there that means the master cyl needs to be replaced before it hurts the rubber diaphram in the booster.

Posted on Dec 11, 2009

Testimonial: "Thank you for answering. I was hoping it'd need a gasket. lol Would have saved some money. But I wasn't sure."

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4 Answers

My boyfriends Toyota Tundra is leaking brake fluid. Sometimes a horrible white smoke billows out of the exhaust pipe just after starting up the truck. It quits after a few minutes. Where do you think the...


The white smoke has nothing to do with the brake fluid loss. Look around the brake master cylinder, brake lines and joiners and brakes for signs of moisture. They should all be clean and dry any build up of dirt could be a hydraulic leak. The white smoke is more likely from warn valve guides.

Mar 02, 2015 | 2004 Toyota Tundra

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Cavalier master cylinder


You have air in your system, you need a helper to bleed the air out. The master cylinder is what ur brake fluid resivore is sitting on, the large round object behind it is the brake booster (looks like a squished basket ball) these will be on the fire wall driverside

Nov 05, 2012 | 1999 Chevrolet Cavalier

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Is the master cylinder suppost to have a gasket when you buy it new


between the master cylinder and the servo is normally a rubber seal O ring

Mar 03, 2012 | 1987 Plymouth Reliant

1 Answer

Replace brake booster


here you go...

The power brake booster is a tandem vacuum suspended unit. Some models may be equipped with a single or dual function vacuum switch which activates a brake warning light should low booster vacuum be present. Under normal operation, vacuum is present on both sides of the diaphragms. When the brakes are applied, atmospheric air is admitted to one side of the diaphragms to provide power assistance.
REMOVAL & INSTALLATION

1994-97 Models
See Figures 1 and 2
  1. Apply the parking brake and block the drive wheels.
  2. Remove the master cylinder-to-power brake booster nuts, then reposition the master cylinder and combination valve out of the way; if necessary, support the master cylinder on a wire to prevent damaging the brake lines.

When removing the master cylinder from the power brake booster, it is not necessary to disconnect the hydraulic lines, therefore the brake system should not have to be bled.
  1. Disconnect the vacuum hose from the power brake booster.


12_11_2011_8_48_59_pm.gif

Fig. Fig 1: Common power brake booster attachment


  1. From under the dash, remove the retainer and washer from the brake pedal on 1994 utility models. On all other models, remove the retainer and brake switch from the brake pedal.
  2. Disconnect the pushrod from the brake pedal.
  3. From under the dash, remove the power brake booster-to-cowl retaining nuts.
  4. Back under the hood, remove the power brake booster and the gasket from the cowl.

To install:
  1. Position the booster to the cowl using a new gasket.
  2. Install the bo oster retaining nuts and tighten to 16 ft. lbs. (22 Nm) 1994 utility models, 24 ft. lbs. (32 Nm) on 1994 pick-up models and 27 ft. lbs. (36 Nm) on all 1995-97 models.
  3. Connect the pedal pushrod and install the washer or switch and the retainer.
  4. Connect the vacuum hose.
12_11_2011_8_52_07_pm.gif

Fig. Fig. 2: Checking the piston booster rod using the gauge tool

  1. For all vehicles cover ed in this guide, gauge the booster rod:
    1. Apply 25 in. Hg (85 kPa) of vacuum using a hand held vacuum pump or apply maximum engine vacuum.
    2. Chec k the maximum and minimum rod lengths using J-37839 or an equivalent pushrod height gauge.
    3. If the piston is not within limits, install a service adjustable piston rod and adjust it to the correct length.
  2. Reposition the master cylinder and combination valve bracket to the booster studs, then secure using the retaining nuts. For details, please refer to the master cylinder procedure located earlier in this section.
  3. Start and run the engine, then check for proper booster operation.

Dec 11, 2011 | 1996 GMC Jimmy

2 Answers

How do i change a brake booster


from autozone.com:

  1. Disconnect the negative battery cable.
  2. Apply the parking brake.
  3. Unplug all necessary electrical connections.
  4. Remove the master cylinder from the booster and pull it off the studs, CAREFULLY! It is not necessary to disconnect the brake lines.
  5. Disconnect the vacuum hose from the check valve.
  6. If necessary, remove the brake light switch.
  7. Disconnect the booster pushrod at the brake pedal.
  8. Remove the booster mounting nuts, located on the inside of the firewall.

24cafd9.gif


Fig. Fig. 1: Vacuum booster mounting

  1. Lift off the booster and remove the gasket.

To install:
  1. Install the booster with a new gasket.
  2. Tighten the booster mounting nuts to 21 ft. lbs. (29 Nm) on all except 1996-98 models. On 1996-98 models, tighten the nuts to 26 ft. lbs. (36 Nm).
  3. Install all remaining components.

Oct 29, 2010 | 1998 Chevrolet Blazer

3 Answers

Blowing white smoke when reved up.... boggs a little when accelerating, idles a little rough also.. its a 93 civic dx with a 1.5l


White smoke is usually caused by a cracked head gasket or cracked head, but some times it is caused by your brake booster sucking brake fluid into the intake through the vacuum hose. If your brakes are constantly going soft, or your brake reservoir constantly needs refilling then that will be your problem. Replacement will include both the brake booster and the master cylinder.

If the cause is a leaking head, you can fix it with sodium silicate (liquid Glass) which can be purchased in most pharmacies. You will need to remove your thermostat to keep it from sticking shut before doing this. Replace it after the smoke is gone.

Remember that the sodium silicate trick is more of a bandaid than a permanent fix. Also remember that sodium silicate is not a good fix for steel heads, and since yours is aluminum it should work.

BUT since your problem only occurs as you accelerate, I would suspect the brake booster and master cylinder.

Apr 08, 2010 | 1986 Honda Civic

1 Answer

How do you install brake booster on 1998 chevrolet suburban 1500


Press brake pedal several time to exhaust pressure from accumulator, Clean dirt from hydrulic line connections at booster and at master cylinder.Disconnect hydraulic lines from booster and plug all openings. Note; in most cases it is not necessary to disconnet master cylinder brake lines to remove booster.Remove and support master cylinder.Disconnect booster push road from brake pedal. remove booster to firewall nuts from inside vehicle.Remove booster and gasket

Aug 17, 2009 | 1995 Chevrolet K1500

1 Answer

Constantly refilling brake fluid reservoir, can not find leak


this is not an uncommon problem.
if you are certain there are no fluid leaks anywhere in the system then look here.

the master cylinder is mounted to the power brake booster there are probably two or three nuts holding them together, remove these nuts and pull the master cylinder forward, now look in to the front of the power booster with a flash light, if you see any signs of brake fluid there than your master cylinder is bad. you want to correct this soon because that fluid is being sucked into the egine and through the combustion chambers. you should replace the power booster as well because it will be contaminated, although you can reuse the power booster untill it fails, i believe there is a gasket or o-ring in between the master cylinder and power booster aswell, make sure you look for it and dont leave it out.

good luck

wesleyschacht@hotmail.com

Jun 14, 2009 | 2000 Kia Sportage

1 Answer

Need to replace a brake booster on a 1998 chevy cavalier


get ready for some work.you need to remove the master cylinder nuts that hold master cylinder to brake booster.once you remove nuts you have 2 choices remove master cylinder to remove booster. to keep from bending brake lines.or you can leave master cylinder in pull it toward you easily careful dont bend lines .disconnect vacuum line at booster .go inside vechicle to floor on driver side loosen four nuts on floor to booster .disconnect power brake push rod from brake pedal .dont force pushrod to the sides when disconnecting it.remove four booster nuts then remove booster.when in stalling the new booster loosely install four nuts then connect the push rod to the brake pedal .install new clip tighten the booster unit .if you decide to remove master cylinder use inline wrenches on master cylinder to remove lines.also plug the master cylinder brake line holes to keep from losing all brake fluid.

Apr 26, 2009 | 1998 Chevrolet Cavalier

4 Answers

Brake fluid leak


There is Supposed to be a Gasket Between the Booster and Master Cylinder. If this Gasket is Gone it will leak like this. If it is Still There, You may need a New Master Cylinder or Booster Depending on what you find when you get it Opened up. Please Rate My Response! Thanks!

Feb 06, 2009 | 2003 Ford Windstar

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