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Water in Coolant keeps boiling?

crossiecrossie Posts: 1
edited May 2014 in Subaru
I need some help. The water in the coolant container keeps boiling and spilling out all over the place once I finish a drive. Can anyone help. My mechanic has checked the raidiator and cap and changed the cap but it still keeps happening. Cheers


  • yogi56yogi56 Posts: 1
    Hello, have a 97' Legacy 2.2 that overheats & leaks coolant at the radiator
    drain plug even though its tight. No leaks in radiator. When we run the air
    shouldnt both fans run contiuously ? Chiltons describes a temp sensor
    and/or thermosensor replacement. If thats the problem, does anyone know
    where these parts are located??

    THANKS FOR ANY HELP !! We are without a ride and desperate !
  • ateixeiraateixeira Posts: 72,587
    My 93 Miata had similar symptoms and it did turn out to be a bad Thermostat.
  • xwesxxwesx Fairbanks, AlaskaPosts: 11,000
    If you are getting leakage at the drain plug, perhaps your system is over pressurizing? If that is the case, it points to a bad radiator cap, as any overflow should be using the overflow bottle rather than leaking out elsewhere. I am trying to remember where the temp sending unit is located, but I cannot recall precisely. I keep thinking of the oil pressure sending unit, which is on the top, front, and dead-center of the engine. *sigh* Darn memory.

    If the car is actually overheating, how long does it take for this to happen? If the thermostat itself is bad, the overheat situation will happen very soon after starting the car (essentially, it will "warm up" and then quickly overheat). If it is a matter of the fans not running, the temp will continue to slowly climb once it reaches operating temperature, but the increase will be slow. For the fans, you need to isolate whether it is a fuse, relay, the fan motor(s), or a sensor controlling the circuit. It is helpful to have wiring diagrams (usually included with a Haynes manual and, I would think, Chilton) so you know what is connected. If you look up the name of the sensors in the book, it should point you to the location of them in their respective (inspect/service) areas.
    2014 Audi Q7 TDI, 2008 and 2013 Subaru Forester(s), 1969 Chevrolet C20 Pickup, 1969 Ford Econoline 100, 1976 Ford F250 Pickup
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