Be sure u are correct about the hose leaking. The heater core is a plastic nippled piece of crap very weak in design. Never pull on the heater hose to dislodge from core instead carefully slit hose with razor blade to seperate from core. place a piece of cardboard under car try to pinpoint leak .Behind crossmember about where gas pedal is is a drain hole where if your core is leaking it will drip out of.
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