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Brake fluid service while pads are fine?

Discussion in '2.5 Gen Tundras (2014-2021)' started by blaserdude, Sep 20, 2022.

  1. Sep 20, 2022 at 9:11 AM
    #1
    blaserdude

    blaserdude [OP] New Member

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    My dealership is recommending brake fluid service (50K miles). I have heard of this when new pads are installed but mine are far from gone. Thoughts??
    BC
     
  2. Sep 20, 2022 at 11:31 AM
    #2
    Taco-Spike

    Taco-Spike From Tacoma World. Fueled by bacon & bourbon

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    It's just a fluid flush right?
     
  3. Sep 20, 2022 at 11:43 AM
    #3
    pursuit2550

    pursuit2550 New Member

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    Brake fluid is always over looked. Brake fluid absorbs water, therefore it need to be changed out. How much do they want for this service?
     
    HulkSmurf14, omgboost and Taco-Spike like this.
  4. Sep 20, 2022 at 11:55 AM
    #4
    blaserdude

    blaserdude [OP] New Member

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    I did not ask. I was in a hurry.
    Will inquire.
     
  5. Sep 20, 2022 at 11:56 AM
    #5
    Winning8

    Winning8 New Member

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    some dealer don't even do a full flush, they just change brake fluid inside the reservoir
     
    WILLINH likes this.
  6. Sep 20, 2022 at 12:06 PM
    #6
    timsp8

    timsp8 Member

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    Get one of those brake bleeder containers with a one way valve and you can do all 4 yourself in 30 min with most of that time spent crawling under the truck to move the container. Will probably take 3 or 4 quarts or so depending on how thorough you want to flush it.
     
    HulkSmurf14 likes this.
  7. Sep 20, 2022 at 12:13 PM
    #7
    omgboost

    omgboost The Accountant

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    Brake fluid is typically every 2-3 years.
     
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  8. Sep 20, 2022 at 2:18 PM
    #8
    Stumpjumper

    Stumpjumper New Member

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    They are just after your money. Then only time I have changed it is when replacing a master cylinder or bleeding brakes after pad replacement.
     
    Malinois38 and Leo's first like this.
  9. Sep 20, 2022 at 4:56 PM
    #9
    Joe333x

    Joe333x Member

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    Should replace brake fluid every two years, doesn't matter the milage. Usually the reason you get a stuck caliper is due to the brake fluid never being changed. Using a mighty vac, its pretty easy, theres also an app on techstream you can use to make sure they are bled properly afterwards.
     
    JLS in WA likes this.
  10. Sep 20, 2022 at 5:15 PM
    #10
    blaserdude

    blaserdude [OP] New Member

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    Thanks. I have never in over 50 years of driving had this done unless the MC was replaced. It can't hurt other than my bank account, however. Had one stuck caliper on a Mercury that was seldom driven.
     
    WILLINH likes this.
  11. Sep 20, 2022 at 5:18 PM
    #11
    Mad Max

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    I agree don't do it unless replacing master cylinder. You bleed yourself and pump the master cylinder dry now you have a real headache. Devil in the details.
     
  12. Sep 21, 2022 at 4:25 AM
    #12
    agrestic1

    agrestic1 New Member

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  13. Sep 21, 2022 at 2:58 PM
    #13
    eagleguy

    eagleguy New Member

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    What does the owners manual say? I was told the new synthetic fluid used does not need to be changed as often but guess it can't hurt.
     
  14. Sep 21, 2022 at 3:05 PM
    #14
    agrestic1

    agrestic1 New Member

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    My 2016 Owners manual says check and adjust...
     
  15. Sep 21, 2022 at 3:07 PM
    #15
    Joe333x

    Joe333x Member

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    Recommended interval regardless of mileage is two years. Do most people do that? Of course not. Will it effect your braking performance if you don't change it? Most likely not. What it will do is collect moisture over time that will eventually require you to replace things like calipers. Brake fluid is cheap and rather simple to do with a tool like a MityVac. I neglected to change rear brake fluid on a motorcycle for probably 15 years and the brakes still worked but the fluid collected tons of crap and was dark brown. Suzuki actually had a recall once because neglecting to change the brake fluid would eventually cause corrosion in the master cylinder and produce the safety hazard.
     
    Last edited: Sep 21, 2022
  16. Sep 21, 2022 at 3:09 PM
    #16
    AZBoatHauler

    AZBoatHauler ASCM#3 Desert Dweller

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    I’m still on my factory fill but it is my next maintenance item. Probably get to it next month.
     
  17. Sep 21, 2022 at 3:12 PM
    #17
    timsp8

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  18. Sep 21, 2022 at 4:19 PM
    #18
    agrestic1

    agrestic1 New Member

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    Put it on my list. My only concern is frozen bleeders .....
     
  19. Sep 21, 2022 at 4:20 PM
    #19
    cougarhound

    cougarhound New Member

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    Better than replacing calipers and rusted brake lines. Easy to do
     
    Retired...finally likes this.
  20. Sep 21, 2022 at 6:34 PM
    #20
    panicman

    panicman Everyone remain calm.

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    Because DOT 3 and 4 attract water and the brake circuit is not completely sealed, you’ll eventually rust out the steel brake lines.

    Flushing is a good idea, and I’d think that every couple of years is fine.

    I have a vehicle from 1960, and I 3 years ago changed out the soft lines and MC. At the same time, I totally bled the system and then flushed and filled with DOT 5. DOT 5 does not attract water.

    I have had no issues whatsoever.

    Has anyone done DOT 5 in a tundra?
     
  21. Sep 21, 2022 at 6:44 PM
    #21
    Joe333x

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    DOT 5 is not compatible with DOT 3 or 4 systems. DOT 5.1 can be used with 3 or 4, but DOT 4 and 5.1 attract more water than DOT 3 and you don't need the higher boiling point of 4 or 5.1 in a Tundra.
     
  22. Sep 21, 2022 at 10:35 PM
    #22
    panicman

    panicman Everyone remain calm.

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    Hold on- help me understand…

    I know that you can’t add DOT 5 to a DOT 3 or 4 system while the system still has residual 3 or 4 fluid present.

    but if you replace the MC, soft lines, etc…, and then fully flush the system with 5, then how is there an incompatibility?
     
  23. Sep 21, 2022 at 10:36 PM
    #23
    Joe333x

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    DOT 5 can not be used in ABS systems.
     
    panicman likes this.
  24. Sep 22, 2022 at 12:21 AM
    #24
    Tundyfundy

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  25. Sep 22, 2022 at 12:33 AM
    #25
    07DCLimited

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    I have mine done annually and even then, the fluid in the calipers themselves is a bit dark due to having been partially broken down because of the heat generated when braking. The harder and more prolonged your braking events, the more often you need to flush. Basically, if you ride your brakes down long mountain passes while towing, flush very often. I'm going to start having the calipers purged when my tires are changed from summer to winter and vice versa. Flushing the whole brake fluid reservoir isn't really required, but a quick flush to change the fluid in the caliper a couple of times a year definitely can't hurt.
     
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  26. Sep 22, 2022 at 12:41 AM
    #26
    Joe333x

    Joe333x Member

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    This is definitely true, brake fluid doesnt really circulate much so even if the reservoir looks clear the fluid in the lines could be pretty dirty. Its not much more work to just flush the whole system while you're at it though if you're doing it yourself, only takes about 2 quarts.
     
    snivilous and WILLINH like this.
  27. Sep 22, 2022 at 12:31 PM
    #27
    cougarhound

    cougarhound New Member

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    DOT 5 is popular in classic cars because it doesn't eat paint..but I believe that is it's only advantage. Supposedly it sucks and racing guys don't use it for the same reason it is not used in ABS systems. It has a tendency to create bubbles. I was considering it for my vintage car project so I did some research.
     
    Joe333x likes this.
  28. Sep 22, 2022 at 12:40 PM
    #28
    Winning8

    Winning8 New Member

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  29. Sep 22, 2022 at 12:44 PM
    #29
    snivilous

    snivilous Member

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    It takes longer to drive literally anywhere than to flush the fluid yourself with someone helping. You just need a hose and a container and bottle or two of fluid. Crack the bleeder, have someone pump the brakes a handful of times, refill resi, rotate around. Takes maybe 15 minutes.
     
  30. Sep 22, 2022 at 12:53 PM
    #30
    cougarhound

    cougarhound New Member

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    How do you guys dispose of brake fluid? Part of the reason why I pay people is because I never know what to do with the chemicals....and no I'm not going to dump it in my backyard. I have well water.
     

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