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Unread 06-02-2011, 03:02 PM   #1
DPYE
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2004 TJ Wrangler 
 
Join Date: May 2011
Location: LOGANVILLE, GA.
Posts: 10
Need help with overheating

I just replaced thermostat with superstat and new radiator cap and flushed radiator cooling system but still running around 220f and goes into red area if turned off and restarted. 2004 jeep tj original 6 cyl. with 4 inch lift and 33x12.50x15 tires. Need an answer to this.

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Unread 06-02-2011, 03:52 PM   #2
CJ258
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1974 CJ5 
 
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Temp rise could be just heat soak. New thermostat may be defective. Is water moving into the recovery tank when it's turned off ?
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Unread 06-03-2011, 03:08 AM   #3
DPYE
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2004 TJ Wrangler 
 
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Location: LOGANVILLE, GA.
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overheating

Was told by local jeep dealer everything was or looked like it was working ok, and I am very puzzled why it keeps doing it. I really don t want to put a new radiator on it. It started just after putting the 33 tires on and seems to be getting worce the hotter it gets here in ga.
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Unread 06-03-2011, 08:36 AM   #4
CJ258
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How's the fan clutch ? Will it spin freely when it hot ?
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Unread 06-04-2011, 06:00 AM   #5
DPYE
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overheating

I asked them to check that and was told it looked ok but I will check again today myself.
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Unread 06-04-2011, 12:03 PM   #6
CJ258
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Many yrs. ago I had a Scout II that would do that. It turned out the vanes on the water pumps had rusted away. I had the radiator recored too figuring the rust flakes had to go somewhere. Cooling systems are not complicated, they just need maintenance.
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Unread 06-06-2011, 09:40 PM   #7
Oldfrog
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1997 ZJ 
 
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A seeping head gasket might do it too. Open the radiator cap, start it and watch for bubbles in the coolant. I'm dealing with a head gasket issue today , myself.
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Unread 06-07-2011, 06:13 AM   #8
DPYE
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overheating

I am going to check the seeping today and see if that might be it, thanks.
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Unread 06-10-2011, 08:55 PM   #9
67dartgt
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You need a new radiator. Sorry man
.
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Unread 06-13-2011, 08:43 PM   #10
DPYE
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overheating

Checked and no signs of any leakage or head gasket seep in motor , so all that is left is water pump or radiator. Just going to run it a little longer to see what happens or until someone out there can tell me anything else.
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Unread 06-13-2011, 11:41 PM   #11
GEaviation
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i would try the water pump mine had a similar prob. it wasnt pushing enough coolant and i would run towards to hotter side. changed it out and it never sees anything above 190
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Unread 06-15-2011, 07:42 AM   #12
DPYE
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I just might try that because new in 04 untill recently mine ran around 190-195 thats why I am so puzzled by the overheating thing. Guess they don t have to leak or make noise to be bad.
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Unread 06-28-2011, 08:51 PM   #13
reelfaith
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OK my TJ did the same. I found radiator was starting to clog. I used a infared temp sensor to locate cool spots in the rad which indicated no or low flow. I replaced rad and all is fixed, running cooler no heat soak. Use the proper coolant and distilled water and red line wet wetter additive.
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Unread 06-29-2011, 05:54 AM   #14
DPYE
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Thanks for all the good info. I am just riding it right now but it is still running around 220. What is running temp after you changed radiator and what kind did you put in?? A standard one core or 3 core?
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Unread 06-29-2011, 07:36 AM   #15
reelfaith
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I am running 210 on a 100 degree day freeway driving with a/c on, with the new radiator. The radiator is the factory replacemant it did say it was a 3 core but I have no clue. I was running 220 and when I turned off the engine it would spike to 260. Now it stays a 210. The new radiator is a OSC brand. Part stores can vary state to state I bought from a local parts house called XL parts they deal mainly with installers or independent shops. You can go to any shop you trust and ask who they use for radiators.
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