I wouldn't be doing the work,hands shot from pinched elbow nerves and I'm not mechanical.A funny thing is the windows get somewhat fogged on early morning startup but will not fog the rest of the day with the defrost on.Had a slight leak at the clamp in the engine compartment which I tightened down a few days back but still get a little fluid on the passenger side rubber mat..sometimes green,sometimes clear looking.Could this be a build up in the heater core box?Never any anti-freeze smell.