Volvo RWD 444-544 Forum

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544 brake fluid reservoir leak 444-544

posted by  Mike544 on  Sun Jul 7 21:23 CST 2013
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last visit: Sat Oct 4 12:01 CST 2014
[RELATED]

Good evening, I hope summer is going well for everyone. Just today I noticed that I have a small leak from the firewall mounted brake fluid reservoir (1965 544, b-18 all stock).

There is a plastic reservoir, a 2 inch piece of black rubber tubing, then the long steel pipe that connects to the master cylinder cap. The leak is where the firewall mounted plastic reservoir connects to the small black rubber tubing.

The reservoir, reservoir cap, and long steel tubing are original while the black tubing is newer (250 miles on it). The leak seems to have started after I adjusted my master cylinder pushrod.

I thought about adding some hose clamps to the black rubber tubing, but I'm not sure if this leak indicates bigger issues (venting of the reservoir cap maybe)?

Any ideas would be appreciated. Thanks!

Cheers,
Mike in Portland








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    544 brake fluid reservoir leak 444-544

    posted by  skeetman on  Mon Jul 8 07:13 CST 2013
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    last visit: Thu May 1 10:57 CST 2014
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    My I suggest removing the reservoir, clean and inspect for the leak. If the plastic reservoir is cracked or damaged replace it. It's your brake system #1 priority.








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    544 brake fluid reservoir leak 444-544

    posted by  planetman on  Sun Jul 7 22:31 CST 2013
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    last visit: Fri Oct 24 09:29 CST 2014
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    Did you overfill the reservoir? There needs to be some room left for expansion of the brake fluid when it gets warm.

    Is the new piece of hose for the bottom of the brake fluid reservoir the correct special hose? The correct hose is not a piece of fuzzy bulk brake fluid resistant hose, but a specially molded hose that has a 5/16" opening for the bottom of the brake fluid reservoir and a smaller end that has a matching taper inside for the flared metal brake line. With this special hose, no hose clamps are required.

    And if you did not leave any free play when you adjusted the brake pedal linkage, that might cause the brake fluid to get hot and cause the brake fluid to over flow the reservoir, but you should have noticed significant drag on the brakes when this happens.
    --
    Eric
    Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
    Torrance, CA 90502








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      544 brake fluid reservoir leak 444-544

      posted by  Mike544 on  Mon Jul 8 10:13 CST 2013
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      last visit: Sat Oct 4 12:01 CST 2014
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      Thanks for the replies, the black rubber connection piece is the 'special' one with two different sizes.

      Before this leak, I had very little free play in the brake pedal. I adjusted such that I now have more free play (and a leak).

      Let me know if you have any other thoughts.

      I will inspect for cracks in the reservoir.
      Thanks,
      MRM







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        544 brake fluid reservoir leak 444-544

        posted by  Mike544 on  Mon Jul 8 19:22 CST 2013
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        last visit: Sat Oct 4 12:01 CST 2014
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        After some poking around, I found a hair-line crack in the plastic fluid reservoir. Unfortunately, I found it by topping up the fluid which promptly ran down my firewall. Thanks for the help!
        Mike








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          544 brake fluid reservoir leak 444-544

          posted by  planetman on  Mon Jul 8 20:38 CST 2013
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          last visit: Fri Oct 24 09:29 CST 2014
          [RELATED]

          Just rinse the firewall with water.
          --
          Eric
          Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
          Torrance, CA 90502







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