Skip the auto shop - Our mechanics make house calls

Q: Bleeding Brakes

asked by on

While bleeding the brakes with a vacuum pump, it appeared that air was seeping through the sides of the bleeder valves. Would you recommend that the bleeder valves be wrapped with teflon tape (or something like it) before bleeding?

My car has 286000 miles.
My car has an automatic transmission.

A: It is nearly impossible to bleed brakes wit...

It is nearly impossible to bleed brakes with a vacuum pump and not see bubbles. The bubbles are not actually coming from inside the brake line. Therefore, this air is something that can be dismissed. The pedal should still become firm eventually after bleeding brakes with a vacuum pump. If the air were coming from the brake line itself, very little fluid would be seen coming through the vacuum pump hose. If you see plenty of fluid coming out, the brakes are being bled properly. If you feel more comfortable with it, adding some tape will not hurt anything during this process. If you would rather have a mechanic take care of this, a certified professional from YourMechanic can come to your location to bleed the brakes for you.

Was this answer helpful?
Recommended services
Get a Quote

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: The truck is shaking at takeoff and stops

Shaking or vibrating may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal...

Q: Brakes don't work very well when it's cold

You have two different issues here. The slow crank may be that the battery is getting weak. It may need to be replaced or the terminals cleaned. The other issue of the high idle and braking issue is probably due...

Q: fuel issues

I can't think of any good reason why you would have to replace three fuel pumps in a row other than fuel contamination or if you are buying bad fuel pumps. There is a company named after an Asian reptile...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.