Q: I poured seafoam in my brake booster I thought it went there instead of in the vacuum

asked by on

I poured the seafoam in the brake booster its been about two weeks now NY brakes are going to the floor and hissing what should I do
My car has an automatic transmission.

Hello, the brake booster assembly will have to be replaced. There are rubber diaphragms that degrade from seafoam. The hissing sound is a vacuum leak with the booster. I recommend having a certified YourMechanic technician come to your location to replace the brake booster.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. I poured seafoam in my brake booster I thought it went there instead of in the vacuum

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Where is the ambient air temperature sensor located on a 2016 impala LTZ?

There is more than one ambient temperature sensor on your vehicle. The engine air intake system has an ambient temperature sensor located in the air duct after the air filter. That sensor is part of the mass airflow sensor assembly....

Q: What sort of brake fluid should I use?

Your brake system is hydraulic – it uses fluid pressure to operate. If the fluid is low, there’s a chance that you won’t have the stopping power you need. Of course, you also have to know the right type of...

Q: Breaks squeek while backing up sometimes

If your brakes are squeaking they are either running low, or have accumulated excessive brake dust. When brakes run low, they will eventually hit the wear sensor which will cause a squeak when you apply the brakes. However, if your...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...