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Unread 11-19-2014, 09:03 AM   #1
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2000 TJ Wrangler 
Join Date: Jan 2013
Location: Kernersville, NC
Posts: 59
Heater core/ No Heat

2000 TJ,4.0, I think. My heater core needs to be cleared out. Heat was working, next day, nothing. So how do I clear out lines & core? Any step by step, DIY's. Thanks in advance.

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Unread 11-19-2014, 01:44 PM   #2
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2000 TJ Wrangler 
Join Date: Mar 2013
Location: Oregon, Ohio
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Unread 11-24-2014, 04:07 PM   #3
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1977 CJ5 
Join Date: Apr 2007
Location: Central, IL
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I used a mixture of white vinegar and lemon juice after flushing it with clean water. The results were unbelievable. Filled up the core with 50/50 of vinegar and lemon juice, waited 30 minutes and flushed until clear. Repeat until only clear comes out after the 50/50 mix. My heater core seemed restored to normal operations.
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