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Old 03-17-2010, 07:19 PM   #1
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Leaking antifreeze on passenger floor

I bought a 92 YJ and drove it home 20 miles with no problems. Heat worked great and the engine temp was fine. Checked all fluids and topped of the engine coolant. Drove it for the second time today and got smoke coming from the defroster vents. Cooland was leaking out of the heater onto the floor. Checked under the hood and it was dry. There must be a break in the line inside the cab??? Help. I am new to the YJ

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Old 03-17-2010, 07:32 PM   #2
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get a hanes or chiltons manual,your gonna need a heater core.dont drive anymore or youll hurt the engine

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Old 03-17-2010, 07:35 PM   #3
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Can I bypass the heater core? Replace it later next fall?

Is it hard to get to and replace?

Thanks for the respone
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Old 03-17-2010, 07:41 PM   #4
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There are two lines that enter the heater core. You can get an adapter and remove them and just route them together, so you won't have heat any more, and then just replace the core later on.
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Old 03-17-2010, 07:42 PM   #5
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yes you can bypass .you will have to take the whole box out
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Old 03-17-2010, 07:50 PM   #6
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The two lines that enter the firewall....Can I disconnect the from the firewall points and connect them together inside the engine compartment? Does that sound right...

You guys are awesome for the responses.
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Old 03-18-2010, 04:04 AM   #7
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Yes you can bypass the heater core. Just connect the to hoses together with a piece of pipe and take a couple of nylon ties and tie the hose out of the way. Tie it to the grill brace rod to keep them out of they way. You will need a small piece of pipe, I think the hose is 5/8 id.
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Old 03-18-2010, 05:07 AM   #8
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When I replaced my heater core there were two sizes for the piping. I think that was so you could not reverse the flow into the core. When you decide to replace the core make the job a lot easier by removing the passenger seat. It will save your back from looking like a pretzle. Good luck with the repair.

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Old 03-18-2010, 07:34 AM   #9
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Thanks for the posts. Anyone used the Spectra Premium Heater Core to replace their core? Seems to be the least expensive. Just don't want to 'get what you pay for' later down the road. Thanks
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Old 03-18-2010, 09:56 AM   #10
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I have have used spectra heater cores before. Didn't give me any problems. Just remember to make sure your coolant mixture is correct.
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Old 03-18-2010, 10:04 AM   #11
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What do you mean by Coolant mixture? You should not use the regular anitfreeze?
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Old 03-18-2010, 10:10 AM   #12
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Yes use regular coolant. If you use already prediluted 50/50 mix you do not have to anything else but if you use straight coolant you have to dilute it. Make sure it is green and not the red extended life.
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Old 03-18-2010, 09:38 PM   #13
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I agree, Heater Core.

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