Cooling system advice
#1
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Year: 1996
Model: Cherokee
Engine: 4.0
Cooling system advice
I have a 96 XJ. My cooling system has been flushed 2 times. Each time a few month later the coolant turns brown. It is still green now but changing. The old owner never flushed the coolant and mix the colors. As a result I get brown coolant after a while. There are no leaks and it has a brand new t-stat.
Today I turned the petcock and nothing came out of the radiator. My guess is that it clogged up by brown gunk. Now what should I do from here? I'm trying to do a very thorough and final flush to get the gunk out.
Should I flush it and chemical clean it? Or,
Replace the radiator?
Today I turned the petcock and nothing came out of the radiator. My guess is that it clogged up by brown gunk. Now what should I do from here? I'm trying to do a very thorough and final flush to get the gunk out.
Should I flush it and chemical clean it? Or,
Replace the radiator?
#2
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Most likely the po used stop leak in the cooling system.
I would change the radiator and flush the heater core and engine block separately with a garden hose.
I would change the radiator and flush the heater core and engine block separately with a garden hose.
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Remove the bottom rad hose from the water pump, the heater hose and top rad hose from the t-stat housing. Stick the garden hose in the heater hose, then in the top rad hose, then in the nipple on the t-stat housing. Much better flush than a heater hose T fitting and it's free.
No such thing as a final flush......keep tabs on the coolant color, check frequently (engine cold).
No such thing as a final flush......keep tabs on the coolant color, check frequently (engine cold).
Last edited by djb383; 05-09-2011 at 04:23 PM.
#6
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Year: 1996
Model: Cherokee
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You're supposed to attach a garden hose to that kit.
I only got the petcock to turn one time around. (I used a long flat head to reach it and turn it) that's all I could get it to go with the flat head. Shouldi try and turn it more?
I really dont want to take apart half the front end to get to it.
I only got the petcock to turn one time around. (I used a long flat head to reach it and turn it) that's all I could get it to go with the flat head. Shouldi try and turn it more?
I really dont want to take apart half the front end to get to it.
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Year: 1996
Model: Cherokee
Engine: 4.0
Originally Posted by djb383
Remove the bottom rad hose from the water pump, the heater hose and top rad hose from the t-stat housing. Stick the garden hose in the heater hose, then in the top rad hose, then in the nipple on the t-stat housing. Much better flush than a heater hose T fitting and it's free.
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#8
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Year: 1998
Model: Cherokee
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Don't mess with the petcock. The garden hose stuck in the top rad hose that u disconnected from the t-stat housing will flush crud out the botom rad hose u disconnected from the water pump. Re-read my 1st post....3 hoses disconnected.
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Year: 1996
Model: Cherokee
Engine: 4.0
Originally Posted by djb383
Don't mess with the petcock. The garden hose stuck in the top rad hose that u disconnected from the t-stat housing will flush crud out the botom rad hose u disconnected from the water pump. Re-read my 1st post....3 hoses disconnected.
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Year: 1996
Model: Cherokee
Engine: 4.0
Originally Posted by 91armygreenXJ
kinda sounds like someone mixed dexcool and regular coolant in your jeep.
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Year: 96
Model: Cherokee
Engine: 4.0 I6
it seems the po ran straight water in your engine and left it in there without putting regular coolant back in forming rust,i had the same problem with a 64 chevy i had and had to flush and flush to get it clear.between your flushing,do what the other guys say wit the water hose flush and flush again.its nerve racking but it will come clean.