1993 Ford F-150 Heater core replaced 3 times

Tiny
LEOLEO21
  • MEMBER
  • 1993 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have replaced my heater core 3 times each time it last for about 4 to 5 weeks then it will start leaking again. We have pressure tested cooling system and it is normal. Does anyone know why this keeps happening.
Tuesday, October 26th, 2010 AT 11:06 PM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Take a digital voltmeter and with the engine running, attach the black lead to the negative side of the battery and dip the red lead into the top of the radiator, into the coolant. If you see a voltage reading of 1v or more, you have an electrolysis problem and are probably missing an engine ground wire some where.
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Wednesday, October 27th, 2010 AT 7:14 AM
Tiny
LEOLEO21
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I checked the voltage we only got a reading of.18 volts not even close to 1v, any other ideas what the problem is. Thank you lyle
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Wednesday, October 27th, 2010 AT 11:33 PM
Tiny
WRENCHTECH
  • MECHANIC
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There aren't really many other options. Just low quality parts or damage during installation. Make sure the engine doesn't have any broken motor mounts that would allow enough movement to pull on the hoses too much.
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Thursday, October 28th, 2010 AT 4:28 AM
Tiny
LEOLEO21
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  • 5 POSTS
I will try a different brand of heater core, the ones I used were made in China junk. Thank you for your help
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Thursday, October 28th, 2010 AT 8:16 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I would go with Motorcraft only.
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Thursday, October 28th, 2010 AT 8:18 AM

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