Re: Large leak from firewall hose
Because your water pump is pumping all the engine coolant through that heater core. If you're not careful you will lose all of the coolant and then real problems happen. Either replace the core now or loop it off before you pump all the coolant out and you overheat the engine
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2021 F150 5.0 Screw
Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0
Master Certified Ford Parts / Warranty Admin
Last edited by djfllmn; 08-03-2018 at 05:54 AM.
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