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Hard brown in coolant

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Old Dec 7, 2014 | 05:27 PM
  #1  
TuPapi22's Avatar
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Model: Cherokee
Default Hard brown in coolant

Ok so i took off my cap from the radiator and there was this brown rock looking thing it was hard substance such as dirt smashed together what is this?
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Old Dec 7, 2014 | 05:32 PM
  #2  
XJlimitedx99's Avatar
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From: Andover, VT
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 L
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Sounds like some kind of stop leak product was used. I would recommend a coolant flush.
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Old Dec 7, 2014 | 05:33 PM
  #3  
caged's Avatar
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From: Northern Ontario, Canada
Year: 1990, 1999, 2000
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probably rust.
mostly caused from running straight water.
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Old Dec 7, 2014 | 05:35 PM
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From: In the middle of Minnesota!
Year: 1999
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Engine: 4.0
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1. What year XJ?

2. Do you know the history of routine cooling system maintenance?

3. Any stop leak product ever used?
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Old Dec 7, 2014 | 05:36 PM
  #5  
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From: The Republic of TEXAS
Year: 1998
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+1, rust.
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Old Dec 7, 2014 | 06:55 PM
  #6  
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From: Kentucky
Year: 2001
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+1 rust......

Post a pic
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Old Dec 7, 2014 | 07:29 PM
  #7  
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From: Australia
Year: 1997 (RHD)
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Yes, we like photographic evidence of this "hard brown", living in your radiator...
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Old Dec 9, 2014 | 03:11 AM
  #8  
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From: Saginaw Mi area
Year: 1994
Model: Cherokee
Engine: 4.0
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Maybe it's a piece of a bar from Barsleaks.....
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