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Unread 03-08-2013, 04:18 PM   #1
Valkyre
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2002 WJ 
 
Join Date: Mar 2013
Location: Oak Harbor, Washington
Posts: 37
Wj 02 Grand Overland 4.7 HO Questions

I bought an 02 Grand Cherokee Overland and it has the 4.7L HO engine but i was told its the J model not the N model....I have no idea what the difference is other than that the airfilters are not the same can anyone explain to me what the difference is and if i am going to run into problems later im trying to put an Cold air intake and exuast on it is there ones that are great etc any tips/advice would help!?!?! thanks

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Unread 03-08-2013, 04:23 PM   #2
funkduck
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You can learn about the HO engine here -
http://www.wjjeeps.com/ho_engine.htm

My opinion is an aftermarket intake is a complete waste of time and money, and an unnecessary complication on these engines.

Do a search on here for "Kolak Exhaust" for everything you could want to know about the exhaust everyone loves for these things.
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Unread 03-08-2013, 04:25 PM   #3
Valkyre
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my question was mostly whats the difference between the n and j models
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Unread 03-08-2013, 04:29 PM   #4
funkduck
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The J just means you have the HO engine, the N means you have the non-HO 4.7

See the 8th digit

http://www.wjjeeps.com/vin.htm
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Unread 03-08-2013, 04:30 PM   #5
Valkyre
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oh your my hero thanks man
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Unread 03-08-2013, 04:45 PM   #6
Darnice
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I thought J and N engines referred to the PCM required, J for J-tec which was 2002 and earlier. N was 2003 and 2004.
J and N have different crank sensor rings, N having more teeth and mor information on crank position.
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