I meant I think I would know it if leaf debris and my own dust went into my radiator. I don't know what kind of damage no filter has on a heater core or the duct work in the car to get the interior heat on. I think things are good inside the pipes, but the other pipes to the vents, and where the fan blowing out at me, might have grime, but that grime probably isn't getting into my engine's antifreeze. And one way to describe that is like adding some substance to my antifreeze. Levels look good anyway. Don't do that job with the engine being hot or else you end up looking like two face on batman lol. You don't have to open up the radiator anyways with the reservoir there of course.
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View my fuel log 2014 Mirage ES 1.2 manual: 42.2 mpg (US) ... 17.9 km/L ... 5.6 L/100 km ... 50.7 mpg (Imp)