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Thread: Heater core coolant shut off valve

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    Heater core coolant shut off valve

    6th gen mirage:

    I am looking into a heater core shut off valve, I know some of my old vehicles had them, and the AC is ice cold with them closed...I posted on FB about it, but can not find evidence of the valve mentioned. I am looking to install one of these bypass valves, probably from a ford ranger, and only turn it 'on' in "winter" being I live in south west florida, I am much more desperately in need of cold, than hot haha


    2018 mirage ES manual

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        click to view fuel log View my fuel log 2018 Mirage Es 1.2 manual: 41.6 mpg (US) ... 17.7 km/L ... 5.7 L/100 km ... 50.0 mpg (Imp)


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    MetroMPG (08-20-2019)

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    Administrator Daox's Avatar
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    Its not a bad idea. It'll make your car warm up faster too, and that means better mileage, especially on short trips.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

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        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


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    Senior Member Fummins's Avatar
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    It'd be easy enough to make your own. Just get 2 ballvalves and a couple t's.
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    Optima

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    Senior Member Top_Fuel's Avatar
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    Here's the inlet/outlet to the heater core on the firewall...

    Name:  heatercore.jpg
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    Maybe just get a short length of hard tubing in the shape of a "U" to connect those hoses together to completely bypass the heater core (no cutting of hoses necessary...with any luck).

    I would be curious to see if this actually makes a measurable temperature difference in your AC.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 51.6 mpg (US) ... 21.9 km/L ... 4.6 L/100 km ... 62.0 mpg (Imp)


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    Senior Member Fummins's Avatar
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    Measurable maybe, noticeable doubtful I'd think the heaterbox flaps do a good enough job of blocking off the heater core? But I'm still curious to see what happens.
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    Optima

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    I was going to use this, where the lines parallel between the intake and firewall

    Name:  Screenshot_20180620-144347_Chrome.jpg
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    2018 mirage ES manual

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage Es 1.2 manual: 41.6 mpg (US) ... 17.7 km/L ... 5.7 L/100 km ... 50.0 mpg (Imp)


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    I noticed a big change in my old F350s AC (before the truck broke) by not letting the core heat up to 205. Any heat, especially in a small vehicle AC system, is degrading the cool of the ac...im going to try this, and see what happens. Worst case I gain 5 cooling, best case I create a freezer haha
    2018 mirage ES manual

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage Es 1.2 manual: 41.6 mpg (US) ... 17.7 km/L ... 5.7 L/100 km ... 50.0 mpg (Imp)


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    Daox (06-20-2018)

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    Administrator Daox's Avatar
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    Cool. Let us know how it goes.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


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    Senior Member ahausheer's Avatar
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    Any updates on this old thread?

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    Quote Originally Posted by ahausheer View Post
    Any updates on this old thread?
    NOPE!
    Still want to do it, just too hot and lazy to do it currently, averaging 105+ days currently haha


        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage Es 1.2 manual: 41.6 mpg (US) ... 17.7 km/L ... 5.7 L/100 km ... 50.0 mpg (Imp)


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