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Old 04-30-2010, 04:24 PM
Moto7387 Moto7387 is offline
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'99 F150 Coolant leak. Heater core?

My '99 F150 has had a coolant smell in the cab, which seemed to get worst with the heat on. Today I drove it home, parked it, and went outside later to find a decent size puddle of antifreeze. The early symptoms seemed tipical of the heater core but the floor in the truck never got wet, and the heater core was replaced 3 or 4 years ago by the previous owner. I got under the truck and looked and can't see where it's leaking from, but it's dripping off the heat sheild for the exhaust. Will a bad heater core leak outside of the cab? Thanks for the help.
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Old 04-30-2010, 04:40 PM
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It can, the coolant will come out of the A/C condensate drain.
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Old 04-30-2010, 09:55 PM
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at the front of the motor, look down behind the alternator and see if there is antifreeze laying in the valley of the motor.
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Old 04-30-2010, 09:56 PM
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skip donw a couple photos----

http://www.ford-trucks.com/forums/88...d-on-5-4l.html
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Old 05-01-2010, 08:50 AM
Moto7387 Moto7387 is offline
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Hmm, I actually replaced the alternator wednesday and didn't notice any coolant, but I'll check again today. If I don't see anything I guess I'll loop a heater line between the motor ports and bypass the heater core, that should isolate it to a motor leak or heater core leak. Thanks for the replies - Jake
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Old 05-01-2010, 08:50 AM
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1973, 2005, bypass, cab, colant, coolant, core, expedition, f100, f150, ford, heater, leak, leaking, leaks

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