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So true hopfuly you have an auto parts place close by so the engine is not hot just warm and no pressure in the system yet. Just be sure the rad hoses are not under pressure yet before you pull the sensor you may need to let it cool down till the pressure drops off. I have popped the rad cap in a hot engine a few times but you need to be very sure you know how to do it and its very dangerous.
Im just a bit crazy at times plus my Dad showed me how