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FIRST MY HEATER ONLY BLOWS HEAT ON HIGH,VERY WELL. NOW ANTI-FREEZE SMELL AND A CLOUD COMING THRU HEAT VENTS,FOGGING MY WINDSHEILD UP. ANY HELP,THANK YOU
Turn the caps off, using them is considered to be shouting and is rude.
The leaking antifreeze is a sure sign the heater core sprung a leak. If you're tight on cash or time you can try radiator sealer, but if you want to replace the heater core, on some models it's a good 8 hour job and the entire dash has to come out.
I did replace it before a few years. Easy job. Somewhat time consuming but really nothing special. Someone post how to with every bolt shown. I have photo of my work.
Dash is one peace. Need not take it away just swing. You open driver side and put at seat and passenger side just unscrew. 2 five hours days of work. Who did that before only one day. 20 screws or so.