problem number 1... when boosting hard i smell coolant.....parked somewhere and had some condensation on my window at the bottom by the passenger side. i think my heater core has a super small pin hole im not getting wet feet...

problem number 2... we put an underpan on my car this weekend.. the result... when i cruise with my windows up i see 30-45% windows down and i see 10% of the gauge and below..what the **** .. my car thinks it doenst have a firewall...

is the heater core hard to replace.. please dont say i have to remove the whole dash:-(