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Porsche 944 Brake Booster

Frequent Faults behind the Porsche 944 Brake Booster

Your speedy Porsche 944's brake booster is engineered specifically to provide you an extra braking power when you hit the brake pedal. However, constant braking use will soon impair the brake booster and will lead to all sorts of car problems such as leaking and fluid contamination. If you think your 944 needs a 911 brake booster repair, better pop up the hood and perform some troubleshooting. Listed below are some of the frequent defects encountered by the Porsche 944 and the reasons behind them:

Delayed braking and harder pedal

Probably the most common symptom of a faulty brake booster is a higher and harder pedal. You see, this can be easily felt when hitting the brakes. A defective brake booster requires you to apply greater pressure to stop the car. In addition, the auto takes a much longer stopping distance than what is normally required. This situation is usually a result of a broken clamp, loose hoses, or cracked vacuum hose connections.

Brake booster fluid contamination

A brake booster failure can also be diagnosed by checking the seals inside the rear part of the master cylinder. When these seals fail, the brake fluid will spill out and contaminate the brake booster's housing. This is easily diagnosed by checking the bottom of the housing for leaks. This leaking will also cause the diaphragms inside the booster to deform.

Defective brake booster vacuum

Because the brake booster is an essential part of the car's vacuum system, testing the intake vacuum and atmospheric pressure would greatly help in diagnosing defects. To test, turn off the engine and pump the brakes for several times to deplete the stored vacuum. Once done, try hitting the pedal lightly while the engine is on. If you feel nothing at the brake pedal, then there is something wrong with the brake booster. You see, a working brake booster would let the pedal fall away a little before it becomes firm.

Other troubleshooting tips

Sometimes a brake booster malfunction is caused by a master cylinder pin that is either too short or too long. The defect in size causes the valve to fail from opening at the exact time, which is crucial in order to produce the pressure needed to stop the auto.

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  • How to Keep Your Porsche 944 Brake Booster in Top Shape 04 March 2014

    Providing enough stopping and braking power from minimum brake pedal pressure for your speedy Porsche 944 is made possible with a working and efficient brake booster. Located under the hood, this part is not immune to leakage and wearing. When it no longer functions efficiently, it can lead to several sorts of car problems such as a difficulty in braking or a stiffer brake pedal. To keep your Porsche 944 in its optimum racing condition, follow these easy maintenance steps:

    • Performing regular brake booster and vacuum testing
    • To ensure that the brake booster is in top shape, it is advised to regularly perform brake booster testing. You see, brake booster problems may also indicate a failing vacuum system. You must regularly check for vacuum system leaks or worn vacuum check valves. This diagnosis can be easily done without the use of special, expensive tools.
    • Repainting and refurbishing the brake booster
    • The brake fluid can cause the brake booster's coating to fade away easily. This is because brake fluid is an effective paint remover. When applying for paint or coating, graphite lube is advised as an effective coating. You see, this addition provides a good covering to ward off contamination from harmful chemicals.
    • Using the right cleaning materials
    • When cleaning both the brake booster and the master cylinder, it is advised to use a brake cleaner because the parts come in contact with the brake fluid. Additionally, degreasers and wire brushes perform the job of removing oil residue, grime, and grease.
    • Knowing when to replace the brake booster
    • An efficient brake booster can last until 30 years, but in some cases it can wear out faster and may need to be replaced when other components of the braking system are malfunctioning. For instance, a faulty master cylinder may leak inside the well-conditioned brake booster and may cause the diaphragm to decompose.
    Other maintenance remindersWhen the brake booster is detached, be sure to disconnect the battery because the pedal falls once the brake booster is removed. Also, when reattaching the brake booster, it is best to let it dry with an air hose before installing.