LINCOLN HEATER HEATER CORE

Do Anyone Have Any Instruction On How To Replace A Heater Core. My Email Is Jameyy@hotmail. Com

Hot Water Goes Thru Heater Core, Butdoes Not Blow Warm Air, Need Info Tenp Control And Atc Door

Recently My Instant Milage Per Gallon Stopped Working In My Dash. (I Recently Had A Heater Core Replaced). How Would I Fix This Issue...

I Would Just Like To Know What To Do To Bypass The Front Heater Core.