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Heater core leaking?

Tiny
BOONJAMMIN
  • MEMBER
  • 1988 FORD F-250
  • 91,000 MILES
I just replaced the heater core in my 1988 ford f250 and it is leaking in the cab again and producing white smoke. Why is this? I replaced the core with one I had lying around and it leaked horribly. I then purchased one from Autozone and installed it.

I checked the hose clamps and they were tight and the hose seemed to be firmly attached. However, when I start the car and allow it to heat up enough for the heater to run, almost inevitably it leaks and produces a smoke from what I believe to be coolant. My truck runs on propane so coolant is vital to it running and I am stranded until I can figure out where this leak is coming from.
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Tuesday, January 17th, 2012 AT 11:12 PM

2 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Maybe it's just burnoff from all the messin around, give it some time and see if it goes away?
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Wednesday, January 18th, 2012 AT 12:49 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
MIGHT ALSO LOOK TO SEE IF YOUR HOSE CONNECTIONS (AT FIREWALL ARE NOT DRIBBLING)

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Wednesday, January 18th, 2012 AT 12:58 AM

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