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Mark
Mark, 22 Year Factory trained technician
Category: Jeep
Satisfied Customers: 11328
Experience:  Jeep factory training........25 years in the industry.
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2002 jeep liberty: the pass side cam gear and it still wont run

Customer Question

what is the difference between a 2002 and a 2004 3.7 motor we put a 2004 motor in a 2002 jeep liberty we changed the pass side cam gear and it still wont run
Submitted: 6 years ago.
Category: Jeep
Expert:  eauto replied 6 years ago.
according to the interchange the 04 is a stand alone year....... Likley the difference is just about every sensor on the motor


part # 02 short block(NNN) NNN-NNNNB
but the 04 is a different number(NNN) NNN-NNNNB
Customer: replied 6 years ago.
we have used all of the sensors off of the 2002 this was block and heads only we used all of the 2002 covers and pans i used to work for jeep before opening my own repair shop and i know the cam gear on the pass side is not the same we put the 2002 cam gear on the 2004 motor and the crankshaft is the same part # XXXXX 2002 to 2006 whitch comes with the crank sensor wheel on it
Expert:  Mark replied 6 years ago.

Welcome to Just Answer Jeep my name is Mark.

 

The difference between these engines is the crankshaft tone ring. The 02 crank is the same for 02 and 03. Starting in 04 a different style of engine controller is used (NGC) and therefore there is a different tone ring on the 04 crankshafts.

Customer: replied 6 years ago.
is the tone ring serviced seperate from the crankshaft if it is do you have a part #
Expert:  Mark replied 6 years ago.
No, the tone ring only comes with the crankshaft.
Customer: replied 6 years ago.
can i change the crankshaft and still use the 04 block and heads
Expert:  Mark replied 6 years ago.
Yes, that should work.
Mark, 22 Year Factory trained technician
Category: Jeep
Satisfied Customers: 11328
Experience: Jeep factory training........25 years in the industry.
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