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Over heating mitsubishi k4n engine

I have a case maxi 50 mini digger with the mitsubishi K4N engine and it runs very hot and will eventualy boil over, i have done the head gasket and had the head skimmed and crack tested, i have changed the thermostat and water pump, i flushed the radiator. any ideas on why it still boils the water?

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  • Anonymous Mar 20, 2014

    Turbo is noisy

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Use 50-50 antifreeze and change your radiator cap but first drain all the old antifreeze out.. hope this help

Posted on Dec 18, 2008

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Where did you find the head gasket kit for K4N?

Posted on Jul 17, 2009

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2006 Chevy trail blazer. Keeps getting hot. Anti-freeze is full, overflow container is half full. Every time I turn it off can hear fluid in radiator boiling and bubbling?


Pam are you sure it's boiling? If the Antifreeze is boiling I'd think you'd see steam coming out of your reservoir as the water expands into the reservoir, but you didn't say you see anything like that.
Of course engines get hot, that's why we have the cooling systems but it doesn't sound like it's "boiling" to me with no signs of visible steam unless your antifreeze level is really low?

If it's really boiling, and you antifreeze level is good, then your reservoir should be getting filled up with expanded hot water that goes into it to catch it when it expands.

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.
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With the engine cool, you can fill the radiator with a 50/50 antifreeze mix. The 50/50 mix come premixed 50 percent water, and 50 percent antifreeze. So you can throw that stuff straight into the radiator.

Non mixed antifreeze needs to be mixed 50/50. Some people use 50 percent distilled water when they mix it because distilled water doesn't have the minerals in it that may get stuck in your radiator. That's being a bit picky about it though. Tap water works fine in a pinch. The other 50 percent is antifreeze. You can mix it right in the radiator too, put in a measured amount of the antifreeze, followed by the same measured amount of water. The water pump will mix it all together when you run the engine.

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