I can hear my coolant "swooshing" around inside my engine?

Posted by Nofear20, Oct 28, 2008
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.

  1. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    2 days ago I put a bottle of Water Wetter in my coolant. Just a few minutes ago I went to start my car and I can actually hear coolant moving around inside my motor. It sounds like coolant rushing through pipes or something. I can only hear it from inside the car when its started, not from the the front of the car with the hood opened. Help!!!
    #1
  2. No_Skillz

    No_Skillz Proven Member

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    Freehold/Morris, New_Jersey
    How do you know it's coolant rushing through pipes?

    On a properly running car with a properly running cooling system, there is no coolant circulation when a cold motor is first started.
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  3. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    The motor wasn't cold. I was driving it around about 30 mins before I went and started it again. I just figured it was coolant because I don't understand what else could make that type of noise.
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  4. Project2G

    Project2G Proven Member

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    Littleton, Colorado
    Is it possible to take video to capture this sound?
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  5. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    I wish. I don't think its loud enough.
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  6. dsmnightracer

    dsmnightracer Proven Member

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    milton, Vermont
    did you mix it right?
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  7. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    I basically just drained a bit of coolant from the radiator and put some Water Wetter in its place. The level was a bit low so I then added a bit more water into the thermostat housing.
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  8. solidviper89

    solidviper89 Proven Member

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    Palmview/San An, Texas
    I get a swooshing sound like that, nothings broken and I have already replaced the water pump and got new fluid for it....

    So I do not think somethings going to break
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  9. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    My water pump is basically brand new as well. How long has your car been making the noise? And did it just start doing it one day out of no where?
    #9
  10. tumtum411

    tumtum411 Proven Member

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    bronx, New_York
    My first time hearing something like this
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  11. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    Well that figures. Thousands of members on this board and I'm one of the select few that have a dumbass problem that no one knows how to fix.
    #11
  12. knochgoon24

    knochgoon24 DSM Wiseman

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    Mt. Pleasant, Michigan
    Are you sure you got all the air out of the cooling system?
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  13. PieEyedPiper

    PieEyedPiper DSM Wiseman

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    North Bay Area, California
    Exactly the same experience for me except that I normally hear it in the morning when the car is cold. I too presume it to be coolant rushing around.
    I also think its normal for my car.

    50k+ on a stock water pump
    #13
  14. jrohner

    jrohner Proven Member

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    Willmar, Minnesota
    I see no reason to worry about it. If you only hear it inside the car its probably just the heater core, for some reason some cars are that way.
    #14
  15. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    I have no idea. I'm not even sure how to do this.

    Another note (not sure if it makes any difference), my overflow bottle is looking a bit low.
    Another note: It just seems strange that it starts doing this 2 days after I put in a bottle of Water Wetter. Coincidence or no?
    #15
  16. grantman10

    grantman10 Proven Member

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    Kingsley, Michigan
    You shouldn't hear "swooshing" in a proper coolant system. The coolant system should be full at all times.

    I would take the cap off and fill it up with some coolant(either 50/50 pre-made, or regular mixed with DISTILLED water). Also, throw some in the overflow bottle, just so there is enough for the engine to "suck in" when it gets cold.

    Then drive it around and let it warm up. After warm, check the tubing going to the radiator, it should be pressurized. If you can easily squeeze the tube together then you probably have a leaking radiator cap.

    I recently had to change my radiator cap, which is no big deal ($5). Just make sure to get a .9 bar (13psi) cap.

    Other than that, i don't know why the coolant would be sloshing around...
    #16
  17. Atuca

    Atuca Proven Member

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    Central Valley, California
    You know I never questioned that sound, happened in both of my turbo DSMs and I just figured on a cold morning/cold start the water wasn't full in the "pipes" because it hadn't expanded. Very unscientifical of me, but it did make sense at the time.

    I will be sure to fill up and redo the radiator liquid.
    #17
  18. Jeff99GS

    Jeff99GS Proven Member

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    Cleveland, Ohio
    Thats the AIR in your coolant system. You either need to burp it or you have a leak somewhere letting in AIR...which also LOWERS the pressure of the cooling system.:notgood: I 'm betting that's why you bought watter wetter....to try and lower the temps. Right? That's only a badaid fix if you're engine is getting too HOT.

    I hate to say it, but I once had that rushing water sound and it turned out to be a bad heater core :toobad:
    It was leaking into the heater box which has a drain for the A/C evap coil. So it was draining out the hole and I never saw any leaking. Till I realized my heat was weak...then I open the heater box and saw the green surprise in there.
    #18
  19. costas14

    costas14 Proven Member

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    quincy, Massachusetts
    ah crap i hear the same whooshing sound, and i always wonder were my anti-freeze is going, and my heat is poor, ah WTF
    #19
  20. Nofear20

    Nofear20 Proven Member

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    Yakima, Washington
    Yes according to link my temps are around 210 to 215 at idle which is pulling timing. My heater seems to work very well though.
    #20
  21. costas14

    costas14 Proven Member

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    quincy, Massachusetts
    how do you bleed these systems out?
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  22. Jeff99GS

    Jeff99GS Proven Member

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    Cleveland, Ohio
    Well you probably have a leaky hose somewhere. First you can try burping the air out.

    Open the Coolant system cap while the car is cold. Is the Fluid right there at the TOP? If not pour some 50/50 in till its up to the top of the filler neck. Then start the car with the cap OFF and let it idle till the Temp reaches Normal Operating temp. Some coolant will overflow a little so put an old towel around to catch the coolant. Once the car is at Normal Operating temp you can put the cap on.

    More than likely you have a leaky hose somewhere. Check around the Throttle body, Heater hoses, Radiator/upper and lower hoses. I always reccomend renting a cooling system pressure tester from Autozone or some other parts store. Then you can pressurize the system and check for leaks! Its like a Boost leak test for your cooling system!!
    #22
  23. robbo185

    robbo185 Proven Member

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    chicago, Illinois
    air in the system

    bleed it and problem is fixed.

    /thread
    #23
  24. olmytsi

    olmytsi Proven Member

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    Miami, Florida
    I'd say it's coming from the heater core. Not sure if it's bad or what. Easy thing is check coolant level.
    #24
  25. knochgoon24

    knochgoon24 DSM Wiseman

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    Mt. Pleasant, Michigan
    They make coolant funnels that fit very nice and tight where you add coolant. I can actually fill the funnel up to the top and no coolant would leak around the neck. Makes it very nice for getting all the air out.
    #25

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