Change Thermostat and bolt size help please.

[Kia_Owner_210]

I dont have the car here right now, and my wife is gonna change it because Iwill be at work. But I kinda wanna get some info before hand.

Is it easy? I heard it was at the end of the big radiator hose leading to the engine.

What wrench size will I need, I know I will need a 10mm to even get to it, but what else.

Any and all advice is greatly appreciated.

[fuji0030]

They get home and dust off the tool box, never read any thermostat installation directions, and proceed to change the thermostat.

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Thermostat