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Hard brown in coolant

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Old 12-07-2014, 05:27 PM
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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 12-07-2014, 05:32 PM
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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 12-07-2014, 05:33 PM
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probably rust.
mostly caused from running straight water.
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Old 12-07-2014, 05:35 PM
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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 12-07-2014, 05:36 PM
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+1, rust.
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Old 12-07-2014, 06:55 PM
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+1 rust......

Post a pic
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Old 12-07-2014, 07:29 PM
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Yes, we like photographic evidence of this "hard brown", living in your radiator...
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Old 12-09-2014, 03:11 AM
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Talking
Maybe it's a piece of a bar from Barsleaks.....
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