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Confirming leaking heater core

Ilikemice

Active Member
Joined
July 6, 2009
Messages
342
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City, State
Midlands, UK
Year, Model & Trim Level
'99 XLT
Hi all, i did an 8hr drive and the cabin started to smell like coolant. It's worse when the fans/heater are on. No leaks under the dash, but there's an open pipe on the passenger side sticking out of the firewall that now dumps a bit of liquid onto the exhaust when stopped. I'm ready to pull the trigger on a new heater core, assuming my diagnosis is correct :)

1999 4.0l SOHC, btw

P.S. what is that little pipe for? It sticks out under the passenger side head about an inch
 




Number4

"I'm counting to 3, then I'm getting your dad."
Elite Explorer
Joined
March 16, 2013
Messages
4,066
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City, State
Woodstock, GA
Year, Model & Trim Level
04 Ford Explorer 4.6l
Smell of antifreeze is a good indicator. Also, if you run the defrost, you'll probably get an oily film on the window.
 




Sip

Member
Joined
December 9, 2011
Messages
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Location
Houston
City, State
Texas
Year, Model & Trim Level
Ford Explorer 91
Hi all, i did an 8hr drive and the cabin started to smell like coolant. It's worse when the fans/heater are on. No leaks under the dash, but there's an open pipe on the passenger side sticking out of the firewall that now dumps a bit of liquid onto the exhaust when stopped. I'm ready to pull the trigger on a new heater core, assuming my diagnosis is correct :)

1999 4.0l SOHC, btw

P.S. what is that little pipe for? It sticks out under the passenger side head about an inch
Post a picture please. I believe I’m having the same problem.
 




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