Heater Core Flush Question - JeepForum.com
 
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post #1 of 9 Old 02-06-2008, 09:58 PM Thread Starter
Jeebs
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Heater Core Flush Question

I searched and have the Hayne's open...

Trying to flush my heater core and wanna make sure I'm not doing this wrong. I have the hoses disconnected and am trying to run water through with zero going through - all coming right out same line.

Question is does the it need to have the key in the 'on' position or have anything set on the heater control panel before hand or should it always pass through.

Thanks in advance

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post #2 of 9 Old 02-06-2008, 10:01 PM Thread Starter
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Nevermind! I got it....just needed a little umf to get it through!
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post #3 of 9 Old 02-15-2008, 10:49 PM
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So you didnt need anything on? Just disconnected both lines that are parallel, and ran the hose through them? What came out?

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5.9 ZJ 7" IRO, 35s, 8.8, hp30, locked, blah blah


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Those tires look freakin awesome Redhat... took the ZJ up a notch in my book. Now you're at notch 2.
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post #4 of 9 Old 02-15-2008, 10:52 PM Thread Starter
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Yep. Disconnected the lines and ran the hose through until it was running clean. There was a lot of brownish fluid and some chunky stuff. I am thinking it was all for nothing though. Now that I have everything reconnected I am getting coolant on the passenger floor board so I think I have a blown core.
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post #5 of 9 Old 02-15-2008, 11:00 PM
Joe Dillard
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Yep, sounds as if you have a bad core Jason. Maybe just bypass it for the time being. Tell the lady to put on another sweater/jacket & you'll be okay.
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post #6 of 9 Old 02-15-2008, 11:00 PM
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That sucks man...I hear the core on those is a PITA. How much coolant did you need to re-add? Do you have a very hot heater now?

-Pat

I am now a dealer for Iron Rock Off Road
I offer the same great products you already know about,
the same low prices you have been seeing, and with
the same experienced customer support, but I can offer it nearly 24/7


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5.9 ZJ 7" IRO, 35s, 8.8, hp30, locked, blah blah


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Those tires look freakin awesome Redhat... took the ZJ up a notch in my book. Now you're at notch 2.
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post #7 of 9 Old 02-15-2008, 11:02 PM
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BTW: Have fun during the new lift kit install party when it arrives. I saw you got a super deal on it!
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post #8 of 9 Old 02-15-2008, 11:11 PM Thread Starter
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Quote:
Originally Posted by redhatman View Post
That sucks man...I hear the core on those is a PITA. How much coolant did you need to re-add? Do you have a very hot heater now?
Actually, I heard its really easy on the YJ. Something like 4 or 5 bolts and it comes right out. I heard a TJ is a royal PITA. Gotta pull apart the entire dash, steering column, etc...
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post #9 of 9 Old 02-16-2008, 06:34 AM
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Actually, I heard its really easy on the YJ. Something like 4 or 5 bolts and it comes right out. I heard a TJ is a royal PITA. Gotta pull apart the entire dash, steering column, etc...
Yeh, it's not that bad. I replaced mine about a month ago in under an hour. Of course it's the second time I had that out, about a year ago I replaced the fan motor. From the engine bay, unplug the fan motor and disconnect the drain hose and take off four nuts. Insides disconnect the three cables going to the housing and pull it out. Open the housing and swap it out. Not too bad. Be carefull putting the housing back in to make sure you don't pinch the wiring for the computer, strange things start happening after that.

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