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Thread: Evans Coolant - High temp

  1. #1
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    Default Evans Coolant - High temp

    Happy July 4th guys!

    I don't know if anyone on here has any experience with using Evans coolant in their Supra?

    I currently have it in my system with aftermarket Mishimoto Radiator, fans, and Flex-a-lite Variable Speed Controller. I have a issue with what seems to be overheating (it would peg around 1/4 before red) during hot days with the AC on. Though once I turn off the AC and let the fan cool. it would bring it back down below half.

    Engine was rebuilt 6k. Keeps sucking coolant but no leak I can see from all aspects. I've burped the system and tried again today but it seems to be ok.

  2. #2
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    Default Re: Evans Coolant - High temp

    It's not the coolant type. It's the sucking.
    In memory of Rimma Kiselitsa

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    Default Re: Evans Coolant - High temp

    Leaking somewhere. Either external or internal.

    Was the block decked with timing cover ?

    Was the head stud torque checked after some heat cycles?

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    Default Re: Evans Coolant - High temp

    Did you bleed the system correctly with the heat on high and the fans off, with this tool
    https://www.google.ca/search?q=car+b...4LneyyAdEnM%3A

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    Default Re: Evans Coolant - High temp

    You don't need a tool to bleed it properly.

    It's a misconception. The system takes about 2 gallons. Fill it drive around the block. Let it cool and then top off. That's all that's needed.

  6. #6
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    Default Re: Evans Coolant - High temp

    The only 7M that needs a special coolant "burp" is a broken one.

    Quote Originally Posted by Raggan View Post
    Did you bleed the system correctly with the heat on high and the fans off, with this tool
    https://www.google.ca/search?q=car+b...4LneyyAdEnM%3A
    Not needed.

    Quote Originally Posted by hvyman View Post
    You don't need a tool to bleed it properly.

    It's a misconception. The system takes about 2 gallons. Fill it drive around the block. Let it cool and then top off. That's all that's needed.
    Exactly.

    The special burp procedure and MHG myths are quickly becoming my pet peeves, haha.

    Just fill the system up and run the engine with the HVAC heat on. Refill as needed.

    OP - you're losing coolant somewhere. A good guess would be out the exhaust via a blown head gasket. Small amounts may not be easy to identify in minor smoke out the tailpipe and would allow the engine to overheat (or come close).

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    Default Re: Evans Coolant - High temp

    Yeah its not needed thats why every professional shop bleeds the system with one. Anyways im not gonna argue with that since you already know

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    Default Re: Evans Coolant - High temp

    Quote Originally Posted by Raggan View Post
    Yeah its not needed thats why every professional shop bleeds the system with one. Anyways im not gonna argue with that since you already know
    Not all engines self-bleed very well. Some engines require a special burping or bleeding when filling the coolant. The 7M does not require any of these things. If you get air in the system of a 7M that doesn't easily work itself out you have a problem in the cooling system - potentially a BHG.

    Here's Toyota's exact method for filling the 7M: http://www.cygnusx1.net/Supra/Librar....aspx?S=CO&P=5

    Drain, fill, run engine, refill as needed.

  9. #9
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    Default Re: Evans Coolant - High temp

    Quote Originally Posted by suprarx7nut View Post
    The special burp procedure and MHG myths are quickly becoming my pet peeves, haha.
    Better watch it. Myth producers don't like it when they are exposed.
    Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other.

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    Default Re: Evans Coolant - High temp

    like I said do what you like it's your engine I was just offering some friendly advice based on my experience, it's your engine not mine.

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