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The only hose connections at the firewall that contain coolant are the connections at the heater core. You either have a loose clamp or the compression fitting between the steel and metal parts of the hose itself are leaking. If there is coolant leaking out of an drain at the bottom area of the firewall, there's a good chance that it's leaking from the heater core itself, through a drain pipe which is the same drain pipe that removes water condensation from the air conditioning.

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โˆ™ 2015-07-15 19:41:46
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Q: How would you repair a 1994 Olds Acheiva that is leaking coolant from a drain connection on the firewall?
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