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Unread 03-14-2009, 08:20 AM   #1
paulderlunas
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1995 FSJ Cherokee 
 
Join Date: Mar 2009
Location: Springfield VA
Posts: 3
Cooling Troubles/Heating Troubles

Hey guys,

I have a 95 Cherokee with the 4.0L She has been running like a champ until about a week ago. I noticed that there has been a small coolant leak, which I traced to the Heater Control Valve, no biggie was probably gonna bypass this. Well my brother borrowed my jeep and said that he couldn't get any heat from it. To me, this sounds like the Heater core? Also The jeep has now be going from 210 then spiking to redline and then cooling off and coming back to the middle around 210, I checked my coolant level and the coolant was baby **** green and just mucky.

questions:

1) Does the gross mucky coolant sound like I could of blown the head gasket?

2) how much of a pain is the heater core to change? are we lucky enough just to pull the glove box or is the dash coming out

Thanks for your help guys!

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Unread 03-14-2009, 08:26 AM   #2
xjfever
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1995 XJ Cherokee 
 
Join Date: Feb 2008
Location: north Ga.
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I would do some testing first. Check your passengers side floorboard for liquid. Flush and fill the cooling system, then have it pressure tested. And a cylinder leakdown test. then you will know where you stand.
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Unread 03-14-2009, 10:34 AM   #3
paulderlunas
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1995 FSJ Cherokee 
 
Join Date: Mar 2009
Location: Springfield VA
Posts: 3
Ok, The jeep smells alittle musty on the inside...I haven't been driving it lately. I've been taking my other car until I had more time to play with it. I'll probably change the heater core for ****s and giggles and do a flush.
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Unread 03-14-2009, 09:04 PM   #4
Paradise XJ
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1990 XJ Cherokee 
 
Join Date: Jan 2007
Location: Paradise, CA, Northern California
Posts: 2,201
Sounds like your core or the flow to it is restriced

Flush the heater core separately. Take off the heater hoses and shove a garden hose in there, top to bottom, bottom to top until all you get is clear water, then put it all back together and flush the whole system. If your heater control valve is still there (if you haven't bypassed it yet) it could be clogged too. It's a restrictive area that can easily get clogged and/or fail. Check the vacuum line to the valve as well.

Changing out the core would certainly be more hassle than flushing and bypassing or replacing the valve it's a bee-otch of a job.
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Unread 03-15-2009, 11:38 AM   #5
paulderlunas
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1995 FSJ Cherokee 
 
Join Date: Mar 2009
Location: Springfield VA
Posts: 3
Thanks for the good advice guys! I'm probably gonna bypass the HCV and flush the system...the jeep was running like a champ before this crap happend. Hopefully after this it should hold up for alittle bit longer...142,000 on the clock and still going! haha
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