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Old 11-12-2011, 03:20 AM
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00 jeep grand cherokee?

hey guys i need some help i have a 00 jeep and its overheating i replaced the radiator cap and the thermostat. i cant figure out what else the problem might be, but i'm also not a mechanic. i would take it into the shop but i'm a bit tight with money right now i would like to know if theres anything i can do before i take it in to a mechanic. thank you for your time and for reading. any advice would be greatly appreciated
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Old 11-12-2011, 04:44 AM
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Re: 00 jeep grand cherokee?

did you burp the system after replacing the tstat?
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Old 11-12-2011, 04:56 AM
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Re: 00 jeep grand cherokee?

check engine oil if its low it can sometimes cause slight over heating. or check to see if anything is blocking the radiator.
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Old 11-12-2011, 05:42 AM
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Re: 00 jeep grand cherokee?

Is there any cooland leaking at all? Have a look around the water pump to see if it's weeping any.
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Old 11-12-2011, 08:37 AM
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Re: 00 jeep grand cherokee?

Cooling fan relay possibly?
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Old 11-12-2011, 11:52 AM
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Re: 00 jeep grand cherokee?

I'd start by trying a radiator flush, it may need flushed out to get rid of any debris that may be causing your problem. And also check for any leaks, bad hoses, etc. I had the same issue with a prior vehicle and did the same things you've tried, flushing the radiator, new thermostat, new radiator cap, and new hoses solved my problem.
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Old 11-12-2011, 08:57 PM
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Re: 00 jeep grand cherokee?

Important to know is when its overheating, allways or only when standing still. Which engine your jeep has (4.0 or 4.7)
Did you change the radiator cap and thermostat because it was overheating, or did the overheating start after the replacement?
If it always overheats, then it could be your waterpump or radiator itself. The waterpump impeller can get loose, causing a too low liquid flow or even no flow at all. Esspecially with the 4.7 take care not to overheat it, because it will warp the heads and cause headgasket failure.
When it only overheats when standing still, it can be the fan itself or the relay. Then also depending on which engine you have, it could also be a problem of the hydraulic cooling fan solenoid valve.
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