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Thread: Sprayed hose in and around coolant expansion tank, is it safe?

  1. #1
    Join Date
    Dec 2015
    Location
    Fresno, CA, USA
    Posts
    87
    My Cars
    2005 BMW 330Ci Coupe

    Sprayed hose in and around coolant expansion tank, is it safe?

    Basically, I sprayed the expansion tank and all around it (including air box) with water. Leftover Oil was in cooling system from previous issue and I drained it out (drainage also had a tiny amount of oil) but I put a hose and sprayed (NOT PRESSURE WASHER) into the expansion tank and rinsed out all the layered oil inside of it. It rose to the top and bubbled out so it got all over the expansion tank so I sprayed everywhere around and under there. The air box is sealed and seated correctly but I did get water all on the alternator, belts, basically all around the expansion tank. Is it safe to drive/start? I didn't cover the alternator because I didn't take anything off.

  2. #2
    Join Date
    Dec 2016
    Location
    Cupertino, CA
    Posts
    10
    My Cars
    2001 BMW 325i
    You should be fine. Getting water outside and on the alternator should not be an issue. Remember, these items are already exposed to the elements. As long as you didn't spray water directly into the intake system, I don't see you having any issue.

  3. #3
    Join Date
    Dec 2015
    Location
    Fresno, CA, USA
    Posts
    87
    My Cars
    2005 BMW 330Ci Coupe
    Thanks went ahead and started him up and he was fine. No issues. Thanks!

  4. #4
    Join Date
    Apr 2009
    Location
    Vancouver Isl, BC, Canada
    Posts
    4,173
    My Cars
    98 Euro M3, 04 M3, 06 M5
    At tap water pressure you are pretty safe in and around the engine. Pressure washer is a totally different story.
    Current:

    - 09 335i MSport, FBO.
    - 98 Euro M3, Estoril Blue
    - 04 M3, Carbon Black, 6 Speed Coupe
    - 06 M5, Black on Black, Full Leather.
    - 73 3.0CS, Tagia Green, 5 speed M30b35 converted

    Ex's: 1984 325e, 1988 325IX, 1992 525I, 1995 540i/6, 2002 330i, 2005 330xi, 1992 850i, 2003 330i #1, 2003 330i #2, 2002 330ci, 2004 330ci, 2007 328CI, 2007 335i, 2001 M3, 2006 M5 6 speed

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