possible reason for loosing coolant?

a broken heater core would make your coolant leak also and since you only use the heater in winter (when its cold) i would assume its a possible cause but im not sure, but i think its worth a check

RysRed96GT said:

where exactly is the heater core? hard to replace/access?

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its in the passenger side kinda located under the dash to make sure its this check to see were teh leak is , might also just be a heater hose the in or the out, or if the passenger side carpet is damp then your best bet is the heater core is broken also can you smell anti freeze inside?

yeah i heard its a PITA to replace cause you need to take out the enitre dash or at least thas what a mechanic told me i just had him do it for me he charged me 180 with parts