Fluid drops under the front apron front left?

  • Hello,

    spotted a drop of oily(?) fluid after parking seemingly overnight on the front left. Today there was one again after wiping it away, can this be related to the fact that I filled it up on the last trip. Is there fluid expanding with the high temperatures? Seems to be a deliberate drain there in front, the brake fluid reservoir is completely filled.

    Lg Stefan

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  • Yes, there is the overflow hose of the brake fluid if everything does not deceive me.

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    Porsche 911 SC 3.0 Coupé, MJ 1982, 930/16, Ko/Zy Mahle 204PS, Köpfe/Einlaufrohre/Airbox 204PS, Zündverteiler 204PS, Schrick NW 288/280, SSI-Anlage, Lambdasteuerung ECU „Andrew“

    Porsche 924 Turbo, MJ 1980, Dt. Fahrzeug, im Aufbau

  • do not know what is there at the Carrrea 997 4S... ;)

    Stefan, tell us but also please what kind of car it is.

    With the G there is the overflow from the gasoline, brake fluid, battery...plus the possibility of leaking cavity preservation.

    LG, Peter

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    911 G-Model Targa 3,0 SC BJ 1981, RdW, 204 PS, 930/10, Motor, Getriebe, Fahrwerk überholt 2015, zinnmetallic, Pascha blau
    neu lackiert 2020
    Smart Roadster Brabus Coupe, "Targa", BJ 2005, 101 PS, speed-silver, Leder schwarz

  • And if it is brake fluid, is it normal that one or the other drop escapes via the overflow? Does that have to do with the current high temperatures? Is this drain intentional? The brake fluid reservoir is full to the top?

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  • Hello Stefan,

    which car? G model - already clear, but Bj and techn. details best please create as a signature. Makes the help much easier.

    Front left are:

    - Windscreen washer water tank

    - Fuel filler neck with overflow

    - Brake booster (BKV, if existing depending on model or retrofitted) and brake master cylinder (HBZ)

    - Battery with overflow (if still present and a clear rubber hose connected to the battery).

    If it is oily, it could most likely be brake fluid. If the car has a BKV, then the HBZ sits directly in front of it, with the brake fluid reservoir perched there above it. It has an overflow via a special textile-covered rubber hose into a tube in the body, the other end of which comes out at the front left in front of the wishbone suspension, pretty much under the battery. Is that where the fluid comes out?

    The reservoir doesn't have to be completely full, I don't remember a line or anything that says "full". I think times fill level to not quite under the overflow is ok, anything more is too much. If the brake fluid heats up during the ride and expands a bit, that could be too much of a good thing....

    Greeting, Thomas

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    81er ex-US 911 SC Coupé, platinmet., eSSD, K-Leder sw., Turboheckflügel & -frontspoiler, NSW, Maxilite 7/8J, Bilstein Fw("SpoStra" - noch...), 915/61, 930/16 o.Kat, WebCam 20/21 NW, hydr.KS, Dansk 92.502SD, 123 Ignition, orig. Porsche SWV, Seine Systems Gate Shift Kit, Momo Prototipo m.Nabenerhöhung


    „Nicht das Auto verdirbt den Charakter, aber wer keinen Charakter hat, sollte nicht Auto fahren.“

    Ferdinand Porsche

  • You can see the overflow hose from the brake fluid reservoir, at the bottom left in front, and therefore you can also see whether brake fluid is leaking out here.

    But actually only happens after a brake fluid change, if you had not correctly or too far away from the tank disconnected and thus liquid is in the overflow hose, which then drips.

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    C1 Cabrio 930/25 MJ89 Grandprix weiß

  • So a minimal loss of brake fluid through this drain would be normal?

    Yes and no.

    Yes, because a small loss (!) is not a safety problem.

    No, because brake fluid is hazardous to the environment (including groundwater) and should not be released into the environment under any circumstances. Also no drops. And certainly not regularly!

    So: Either go to the workshop you trust or to the place where the brake fluid was refilled or changed. They should suck out the excess amount.

    Or draw off a few ml on your own with a disposable syringe and fill it into a suitable container and dispose of it according to regulations. Nothing else. Period.


    Greetings, Thomas

    This post has been automatically translated.

    81er ex-US 911 SC Coupé, platinmet., eSSD, K-Leder sw., Turboheckflügel & -frontspoiler, NSW, Maxilite 7/8J, Bilstein Fw("SpoStra" - noch...), 915/61, 930/16 o.Kat, WebCam 20/21 NW, hydr.KS, Dansk 92.502SD, 123 Ignition, orig. Porsche SWV, Seine Systems Gate Shift Kit, Momo Prototipo m.Nabenerhöhung


    „Nicht das Auto verdirbt den Charakter, aber wer keinen Charakter hat, sollte nicht Auto fahren.“

    Ferdinand Porsche