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Thread: Coolant is still running too cold?

  1. #11
    Legendary 4bye4's Avatar
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    Hi guys I'm not sure that I'm following all this but the water to the gas converter isn't to cool the converter but to heat it up as when the gas changes from liquid to gas (converts) in the converter, it cools and can freeze. Therefore the converter is heated to keep the gas in a vapour.


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    dom14 (16th August 2016)

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    Patrol God threedogs's Avatar
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    I wouldn't be using any of the gas hoses for engine temp readings
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    The master farter
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    Quote Originally Posted by 4bye4 View Post
    Hi guys I'm not sure that I'm following all this but the water to the gas converter isn't to cool the converter but to heat it up as when the gas changes from liquid to gas (converts) in the converter, it cools and can freeze. Therefore the converter is heated to keep the gas in a vapour.


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    Yeah correct but if the op has the sensor on the outlet side of the converter, the water temp there will be cooler that the water going into the converter....

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    dom14 (16th August 2016)

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    Legendary dom14's Avatar
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    Quote Originally Posted by Robo View Post
    Maybe your thermostat is sticking open.
    The aftermarket temp sensor needs to be as close to the heat as you can get it for an accurate reading.

    When I have had temp readings like your pic is showing,
    Replacing the thermostat cured it, each time.
    It wasn't sticking open when I bench tested it. But, I'm suspecting now, it might be opening up too early, as it's pointed out to me in earlier posts.

    I'll get a higher temp thermostat and see how it goes.
    But, before that, as you advised, I should install the sensor in an appropriate location and get a proper temperature reading first.
    I will post the outcome tomorrow.
    The sensor wire need to be extended manually. Hopefully, that won't throw the accuracy of the gauge reading too far, but I will find out on a bench test first before I fit it to the coolant system.

    Thanx mate.
    Last edited by dom14; 16th August 2016 at 12:48 AM.
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    Legendary dom14's Avatar
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    Quote Originally Posted by threedogs View Post
    I wouldn't be using any of the gas hoses for engine temp readings
    Yeah, I wouldn't have either. I only opted for that location 'cos of the short sensor wire. My original idea was to stick it near the cylinder head coolant port, where the stock temp sensor is. It will be done that way tomorrow and I will get a far more accurate reading of the coolant temperature.
    Last edited by dom14; 16th August 2016 at 12:48 AM.
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    Legendary dom14's Avatar
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    Quote Originally Posted by mudski View Post
    Yeah correct but if the op has the sensor on the outlet side of the converter, the water temp there will be cooler that the water going into the converter....
    Yeah, it's logical to picture it that way.
    But, my test above says otherwise. It's even more bizarre, 'cos the coolant line I thought the IN line T joint is producing a slightly less temperature than the OUT line from the LPG converter.
    So, it's confusing for me atm.
    Obviously, I don't have a good understanding of the coolant circulation system, especially how and where the water pump fits in the diagram and how things are plumped in and out of the water pump, as well as other lines inside the engine block.

    It looks like I need to do some homework on that before drawing any diagrams as in the OP.
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    Hi Mate, extending the temp wire will make no differance to the reading at your gauge. you said that you moved the sensor to a differant place on the engine. you need to put the sensor in its correct place so it gets the correct coolant reading, then all will be ok.

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    dom14 (16th August 2016)

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    The master farter
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    @dom14 Have you got a service manual for the GQ? Haynes etc or the downloadable pdf? I'm sure theres a pic in one of those things showing a diagram of the water flow directions.

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    dom14 (16th August 2016)

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    I've got mine installed on the top radiator hose, which is drivers side on my vehicle. Not sure if it's the right spot, but my temps are reliably between 77-82c depending on weather/load/conditions. About right for my thermostat. It's a mechanical gauge for what it's worth. Think it was a $25 speco meter jobby. Tested it in a boiling pot before fitting and read 100c at boiling so is close enough for me.

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    dom14 (16th August 2016)

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    Legendary jay see's Avatar
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    I find it to have any sensor as close as possible to the original the most practicable and efficient way of getting the correct reading.
    Don't know how different your engine is to mine (tb45), but I've got mine just before the thermostat right next to the original one.

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