Brake Flush Question

[SHOZ]

I've tried vacuum bleeding with the hand pump with some success, but never seems to work good on the Accent. It has the typical Hyundai calipers. I have a vacuum pump for AC work. Hmmm.......

 

[Greatlake]

You do know that fluid doesn't compress? Air bubbles do. When some person endeavors to do a flush in their driveway using a floor jack because you tell them it is vital? I disagree. There should be no air in someones brakes if the system isn't too low as it should never become. As the pads wear the distance needed to compress the pedal changes to compensate for thinner pads. Uneven wear is usually a sign of external brake hardware and lubrication issues. Asking some dude that top changes his oil and wouldn't know a triple square from a torx to flush his brakes is not something I am comfortable doing. If they do indeed manage to free the bleeder without breaking it, also manage to introduce fresh fluid all the way to the bleed without introducing air. Great! They have left a fraction of fluid behind within most ABS systems accumulator/diverter sov systems. So why bother? Keep the system closed. Replace pads when needed using new hardware and recognized lubrication techniques. Push those cylinders back in and watch your master cylinder reservoir replenish itself. If you absolutely have to, go to the dealer and give them a hundred bucks for this un-needed service. It is funny when you look online how self serving the industries are in their opinions. If you are really concerned about the hygroscopic aspects of Dot 3/4 fluid you can convert to Dot 5 which is hygrophobic. No rust, not likely to boil, found in motorcycles all over the world.

DOT 3/4 fluid is not compatible with DOT 5 and should never be mixed.

Conversion from DOT 3/4 to DOT 5 is difficult and requires complete removal and clean-out of DOT 3/4 from the entire braking system.

DOT 5 fluid is not compatible with ABS systems. Most modern vehicles including many motorcycles have ABS.

 

[SHOZ]

Most vehicles reduce pressure to the rear somehow and this slows things down if you are pumping the pedal. Having the engine running and the power boost speeds this up quite a bit.

 

[JHZR2]

You would need to check if cycling the abs is recommended.

Otherwise just pressure bleed. If it was never done, the fluid may be nasty for a while.

 

[Donald]

Get SS Speed Bleeders then some tubing and a container. You can then do it yourself.

Don't run master cylinder dry.

With SS Speed Bleeders less chance of a rusted-on bleeder screw in future

Annoying to have to replace a caliper because of a rusted-on bleeder screw.

Always 6-point wrench or socket for bleeder screw.

 

[SHOZ]

If a bleeder does not come free easily just heat it up for about 30 seconds with a torch.