1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Is there a comprehensive step-by-step video for brake-fluid flush?

Discussion in 'Gen 2 Prius Main Forum' started by priuslyfe, Jun 21, 2024.

  1. priuslyfe

    priuslyfe Member

    Joined:
    Dec 20, 2021
    129
    32
    0
    Location:
    43202
    Vehicle:
    2008 Prius
    Model:
    Touring
    I've watched plenty of vids and now I'm more scared to do it.

    My 08 Prius has around 300K miles and likely has never gotten a fluid flush. Its basically black however I understand the issue is more the amount of moisture in the fluid itself which is what causes problems. Recently, I got in the car on a very hot morning 95F and after starting the dashboard "brake light" and beeping for about 30 seconds would occur intermittently. I looked on this forum and narrowed it down to lack of hydraulic brake pressue possibly caused by low Dot 3 Brake Fluid. Mine wasn't low but I added a few ounces and the problem disappeared.

    HOWEVER, I bought 64oz of Prestone Dot 3 Brake Fluid to perform the flush myself and have seen very inconsistent videos on youtube. Some mention not to open the car door at all. Another one casually mentions at the end "whatever you do, don't have your car keys on you!!".....like c'mon what if the viewer didn't get to the end and watched that stupid video as a tutorial?

    Is there a COMPLETE GEN 2 PRIUS Brake-Fluid Flush video that is legitimate?

    Thanks Again!
     
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,626
    3,847
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    You probably won't go wrong following the repair manual.

    Where it talks about the intelligent tester you can replace with Techstream (or another capable bidirectional car scan tool)
     

    Attached Files:

    priuslyfe likes this.
  3. highmilesgarage

    highmilesgarage Active Member

    Joined:
    Jul 28, 2022
    277
    104
    0
    Location:
    Kansas City
    Vehicle:
    2007 Prius
    Model:
    Touring
    just do the turkey baster suction thing.. easy and safe. Do it every week until you get a clear brake fluid. Brake fluid does absorb moisture but it doesn't mean it will be 50% water after several years. I have cars more than 10yrs (15 or more) that hasn't done any brake flush.. just the usual brake bleed when necessary (brake caliper/hose replacement jobs)
     
  4. priuslyfe

    priuslyfe Member

    Joined:
    Dec 20, 2021
    129
    32
    0
    Location:
    43202
    Vehicle:
    2008 Prius
    Model:
    Touring
    I'll research that but I take it you mean just periodically removing and refilling brake fluid through the top?
     
  5. highmilesgarage

    highmilesgarage Active Member

    Joined:
    Jul 28, 2022
    277
    104
    0
    Location:
    Kansas City
    Vehicle:
    2007 Prius
    Model:
    Touring
    yes
     
  6. ColoradoBoo

    ColoradoBoo Senior Member

    Joined:
    Jul 19, 2019
    950
    624
    4
    Location:
    Monument, Colorado USA
    Vehicle:
    2017 Prius
    Model:
    Two
    If you don't want to mess with an electric scanner, you can still do it old-school. Before you start, just disconnect the negative battery terminal from your 12-volt battery.

    I've used a number of hand-held extractor pumps and these kind work the best because you can pump with one hand and use the other to hold the rubber end on the brake drain plug.

    [​IMG]

    Get the car up on jacks and you don't have to remove the wheels but it does make it a lot easier. (I like to)

    Open the brake fluid cylinder and suck out as much as you can (a turkey baster is fine) and then fill with FRESH brake fluid from a bottle you just opened.

    There's debate over what pattern to drain the fluid but, to be honest, it doesn't matter much as long as you pull out enough to see the fluid clear.

    Open a brake drain bolt, when you see fluid coming out, connect the cap and start pumping. If it's pretty dirty, you'll need to fill the reservoir 2-3 times before it gets clean. While pumping, it will look like air bubbles are coming out of the car but that's just air from around the plug as it's being sucked out. After you've drained enough, remove the rubber piece and let a few tablespoons more drain out to ensure no air is inside there. Tighten the drain plug and check the brake reservoir over on the engine and add more if it's getting low. Just do this on all 4 tires. I'll buy either a large bottle of brake fluid or two smaller bottles.

    Tip: Put down some old carboard under the tire when doing this...brake fluid does bad things to concrete. And wear some good gloves.

    Another tip is to go ahead and clean out your Throttle Body before starting the car...I always do this when disconnecting the battery.
     
  7. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,626
    3,847
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    If all you want to do is move fresh brake fluid from the brake reservoir to each corner, then probably yes, but you will not be able to flush fresh brake fluid through the actuator without a capable scan tool.
     
  8. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    55,384
    38,628
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Have you consider phoning the dealership, getting a quote for brake fluid replacement? Gen 2 Repair Manual does not offer a non Techstream method.


    In my experience its been around $150 CDN.