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2002 Jeep Grand Cherokee Overland coolant loss

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Old 01-12-2017, 08:48 PM
  #16  
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Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
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The word I got was they started using the "TUPY" head during the 2002 production run, so I imagine they used up the existing stock of heads.

If you shine a strong flashlight down the oil filler cap hole, you should see a "TUPY" molded into the metal if you have one.
Old 01-13-2017, 07:47 AM
  #17  
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Year: 2002
Model: Grand Cherokee
Engine: 4.7 HO
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Originally Posted by Batman229
Question about the heads...

I have a 2002 Grand cherokee laredo. Mines had the same coolant loss with no appearent leaks. Mechanic said replace radiator cap. Did that now still same thing. Did they roll over using the 0331 heads in the 2002's to get rid of them? Or is there a certain date of manufacturer they stopped using them?
Have your mechanic do a pressure test of the cooling system or take it to one that will. Put in some form of die compatible with your coolant.

http://www.autozone.com/test-scan-an...ye/835773_0_0/

http://www.oreillyauto.com/site/c/se...Redirect=N2323

Once the pressure test is done you can change your oil and use a UV light everywhere.
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