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E30 M3 head with third sensor on coolant rail?

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  • E30 M3 head with third sensor on coolant rail?

    Is this an early head with fan switch on coolant rail?



    thought there was something different about it

  • #2
    That third switch looks like what I want to do. That switch is probably for a water temp gauge inside the car.


    [email protected]

    1969 2002 racecar
    1989 M3 racecar
    e39 Touring

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    • #3
      Do you mean you want to trip a warning light with it?

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      • #4
        Originally posted by hardtailer
        Do you mean you want to trip a warning light with it?
        Not a warning light, simply another water temp gauge.


        [email protected]

        1969 2002 racecar
        1989 M3 racecar
        e39 Touring

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        • #5
          that will be hard with a switch, but I take it you'll use a temp sender/sensor for it.
          Personally I see more of a benefit in a warning light than in an additional temp gauge, even if that shows a numeric value. Its like oil pressure, I dont need to know what it is exactly I just need to know when it is about to go wrong so I can react before damage is done.

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          • #6
            I just thought it looked "Factory" as opposed to an aftermarket job. A very clean install if it is the latter.
            I would have thought a warning light would also be a good idea as opposed to another water temp guage.

            P.S. "Hardtailer" Have you still got your 320is or did you get rid of that?

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            • #7
              I still got it. Both actually, a 4-door and a 2-door 'track rat' with a blown engine that has been sitting for the past year. Finally got hold of a sound S14B20 that I will put in there over winter.

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              • #8
                That looks to me like a pressure sensor on the rail.
                If so, nice idea, but I don't think that photo is honest.


                m

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                • #9
                  That rail looks DTM motorsport to me not an early one.

                  Andrew


                  [email protected] | H23-is | S14 | Ceccoto #270

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                  • #10
                    ive never seen this before, but after seeing this im going to add two more sensors to my coolent rail for a temp gauge and a fan switch

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                    • #11
                      Originally posted by ///meric
                      ive never seen this before, but after seeing this im going to add two more sensors to my coolent rail for a temp gauge and a fan switch
                      What use is that? You already have a temp gauge and you can fit a temp switch for an aux fan either in the thermostat housing or in the bottom of the radiator (in that case youll need a switch that switches at 10C lower temps (81C-88C)

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