XJ radiator has grey silt/sediment in it w tiny metal flakes
#17
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
The 4.0L cooling system isn't a Class 1 clean room... you realize the overflow tank is open to the atmosphere and the cooling system basically inhales dust, right?
#18
Junior Member
Join Date: Apr 2015
Location: Mesquite NV
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Year: 2000
Model: Cherokee
Engine: 4.0
I would use any water you can find. Once you add coolant back in- it contains inhibitors and additives- and will make the system completely fresh after a couple minutes.
#19
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Location: Southern Maryland
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Year: 1991
Model: Cherokee
Engine: 1999 4.0L
quener is correct, distilled water is the right thing to use. Only need one of the 2.5 gallon jugs from the grocery store, just a couple of dollars and worth it. Yes distilled water picks up impurities and goes bad eventually, but tap water starts bad and has all the hard water junk in it from the get go. You can flush with tap but when you have all the old junk out, last fill should use distilled water.
Last edited by ehall; 07-06-2015 at 01:16 PM.
#20
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
quener is correct, distilled water is the right thing to use. Only need one of the 2.5 gallon jugs from the grocery store, just a couple of dollars and worth it. Yes distilled water picks up impurities and goes bad eventually, but tap water starts bad and has all the hard water junk in it from the get go. You can flush with tap but when you have all the old junk out, last fill should use distilled water.
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