Question about 2002 Jeep Liberty

5 Answers

2002 Jeep Liberty 3.7L Engine Swap to newer 2004 engine

Okay, this is driving me nuts! I have a 2002 Jeep liberty with a blown 3.7L engine. I am going to replace it, but am having trouble finding a 02/03 engine around here locally. I find plenty of 04/05/06 3.7 engines and was wondering if I would be able to drop one of those in? I understand they have different crank reluctor wheels and possibly cam reluctor wheels. I was thinking of putting a 04 engine in and then also swap my PCM for a newer 2004 PCM with the later engine tune that should be calibrated for the 04 engine. Does anyone have any knowledge if this should work? I would expect the wiring harnesses to be the same between the 02 and 04 engines and would think everything would just bolt right up and fire up. Any input would be greatly appreciated, thanks!

Posted by on

  • 3 more comments 
  • 1SickWS6 Jun 25, 2009

    I have a 2002 jeep liberty 3.7L and want to put a 2004 Jeep Liberty 3.7L engine in it, but they have different crank reluctor wheels and possibly cam reluctor wheels therefore the tune will be off and it will not start with the 2002 PCM. I am wondering if I also swap in a 2004 PCM if it will fire up? I would imagine the wiring harnesses would be the same, but am not sure...

  • Richard Scordino May 11, 2010

    Never trust the wiring harnesses...I have five different diagrams and none of them match my jeep.

  • yadayada
    yadayada May 11, 2010

    try our live chat

  • skudoman
    skudoman Feb 10, 2013

    http://www.youtube.com/watch?v=UljDiisBb... thinking of doing this take a look at this video and make life easy.

  • Michelle Holden Jul 27, 2013

    Can the reluctor gear be changed from a 12 tooth to a 31 tooth?

×

Ad

5 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

Has anyone made this work yet? I have the same problem 2002 jeep 3.7 and just installed a 04 motor. Timing is off. Some one had a good idea of mounting the crank gear to the out side of the harmonic ballancer and mounting the sensor with a bracket. What about the cam gear on the left side. Does the timing cahain have to come off to remove it? Or has any one swaped the wiring harnest, and computer.
Please email me back. pcardoso@cogeco.ca Thanks for your help.

Posted on Apr 21, 2012

Ad
  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I have just done that engine swap - check my recent post as now the engine turns but wont start - Jeep dealer says -04 engine part numbers on the 3.7 Liberty are the same as the 02-04 Dodge 1500 3.7 - which engine was easier to find & cheaper than the Liberty. I bought the 04 & switched out all of the sensors off my 02 except the crank sensor. That may be why it wont start - I called the parts store & they said the sensor was different. I will let you know how it works out - I will be working on it tomorrow..

Posted on Jun 28, 2009

  • ad4le Jul 01, 2009

    Stick with the 02-03 engine - I am swapping it back out - the one cam gear between the 02-03 & 04 on the right side ARE different - block & crank & left cam gear are the same but because of the difference on the electromagnetic vs. plain right gear, it's too much work for me to go through the engine to bother with it. I'm not going to swap computers, wiring - etc.

  • Michelle Holden Jul 27, 2013

    Can you change the reluctor gear?

×

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I build a 2002 3.7 engine in a2004 jeep.the car will not start. take it out again and chahge the crank gaer and the cam gear.the car start running very good,but they took out the 2004 cats out and i build the 2002 cats in,but my engine light still on.they show me the 2 codes,420 and 430.

Posted on Apr 08, 2012

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

There are also different camshafts, different valve springs, engine will have different emission profile, but in range of adaptation I think.
If you want to have exact this same profile, You should move also camshafts and springs to newer one.
You have to change right cam gear, crankshaft reluctor, intake, probably oil smoke and pan (depends of what model engine is), all sensors. There is also ring in back of crankshaft whitch will block putting 2002 transmission converter, you need to have special tool to remove it. This says that it's lot od work, what we are doing now, nearly all new engine disassembled... in few days we'll try to fire engine, let's see...

ad4le - is Your finally running?

Greetings
pawel
hd-customs.pl


Posted on Feb 24, 2010

  • 1 more comment 
  • caniggia Mar 03, 2010

    swap completed with success as described. fuel corrections are in the limit 10% (available limit 25%), runnig better than old one.




  • ERIC Oct 15, 2011

    Did you just change right cam gear, crankshaft reluctor, intake, all sensors, ring in back of crankshaft which will block putting 2002 transmission converter? I have an 2002 Jeep liberty and a 2004 motor. Is the crankshaft reluctor part of the crank? Thanks

  • Michelle Holden Jul 27, 2013

    I a looking to buy a 2004 3.7 motor to put in an 2004. Has anybody done this or does anyone know how to do this? I know the cam gear and crankshaft reluctor are different and I'm gonna have entire 2004 truck. Does anyone know, instead of changing everything on the engine, can you just change the computer?

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Do not use the 04 motor, I am going thru this right now, the crank is the same but the reluctor gear is different and even though you've changed the cam gear, it will not start.

Posted on Oct 26, 2009

  • biker280 Nov 01, 2009

    Also, forgot to mention, the intake on the 04 is missing the intake temp sensor, not a big deal but you have to swap intakes.

    The computer will not swap as its totally different. I am pulling out the 04 motor and putting a low mileage 02 motor in, what a cluster ****, :(


  • cheeno66 May 26, 2010

    would an 05 3.7 work on an 04 jeep liberty blown 3.7?

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Luz marcada con el numero cinco?


2003 Jeep Liberty- Reading Engine / Diagnostic Codes ...

? 1:13
https://www.youtube.com/watch?v=pGrPBBzp7wE
Jan 6, 2013 - Uploaded by DeathScouter
2003 Jeep Liberty- Reading Engine / Diagnostic Codes ..... error code will flash 2 times, brief pause, flash 1 time, pause, flash 5times, pause, ...

2005 Jeep Liberty possible cause of P0442 error. - YouTube

? 5:26
https://www.youtube.com/watch?v=2ba-gH0gadg
Dec 21, 2014 - Uploaded by TheBGravit
While replacing a bad fuel pump I believe I found the cause of a P0442 Error code. I was able to repair the ...

Jeep Liberty Questions - Cylinder Misfire code - CarGurus

www.cargurus.com > Questions > Jeep > Liberty

CarGurusMay 27, 2009 - My jeep Liberty 2009 does the same the Dashboard showed a code of cylinder .... i have a jeep liberty 2006 with the # 5 cylinder misfire. i replaced the sparks... I have a 2005 Jeep Liberty 6 cylinder, engine light came on scaned the ... 2002 jeep liberty camshaft posistion sensor error code p0340 5 answers.

Check Engine Light/Misfire Due to Intake Valve Locks ...

repairpal.com > Problems > Jeep > Liberty
Recently got a second hand 2005 Jeep Liberty Sport. Everything worked fine ... #5intake valve seat dropped and held open the intake valve. 2008 Jeep Liberty.

OBD-II Trouble Code: P0305 Cylinder 5 Five Misfire Detected

www.obd-codes.com/p0305


Dec 08, 2015 | 2005 Jeep Liberty

1 Answer

2002 Liberty 3.7 Recent new heads, coil packs, plugs. At dealer compression OK , leak down test OK. was running perfectly then random misfires, spark advance jumping from 0-17 at idle.. At speed all is...


you must RUN the scanner/computer for better diagnostic. You can have fuel system malfunction, detonation, valve noise, valve adjustment is set too tight, , intake manifold system is leaking.Engine fuel pump is defective+pcm (ignition system).In short the electronic is complicated now in vehicles.
God bless you

Jul 31, 2013 | 2002 Jeep Liberty

1 Answer

2002 jeep liberty, engine doesnt want to stay running,must give throttle,hard start. heavy misfire when running, codes P0202 and P1282. thinking its a pcm issue?


check security of the wiring for fuel injector for cylinder #2. Check resistance of this injector and compare the reading to another injector. replace if needed

There may be an issue with your fuel pump relay or its wiring. however service injector first to see if trouble code does not return

Nov 04, 2010 | 2002 Jeep Liberty

1 Answer

My mechanic Just replaced my blown 2002 3.7jeep liberty engine with a new 2003 3.7 jeep liberty crate moter. It won't turn over. He says no compression in any of the cylinders...(rocker arms too tight)...


Not much of an expert on this but heres a little pdf which should help a little if you wish to read up and do the work your self but it seems a little strange to have no compression. Please stay in touch and when i have more time i will do some fast learning about your specific engine. many thanks karl

Jul 06, 2010 | 2002 Jeep Liberty

1 Answer

Jeep Liberty 2002 heater does not work when engine is ideling


Check anti-freeze level and thermostat first.If not, there's some electronic/computer/sensor ********! I once replaced a heater core in a friends car only to find out she was low on anti-freeze the whole time but not enough to send an alarm or blinking light. You can have flucuations in heat when engine exurts pressure wi'll driving and while idling.

Feb 16, 2010 | 2002 Jeep Liberty

1 Answer

How to remove wheel hub assembly on jeep liberty


take the axle nut off and take the spindle off off.on the back of the spindle you will find three bolts.Remove the bolts and beat the hub and bearing out. the new one will go right in. not a hard job

Dec 29, 2009 | 2002 Jeep Liberty

3 Answers

2005 Jeep Liberty 3.7L engine light stays on. Gas cap is tight.


U need to pull the fault code go to NAPA they do that for free. I will help you from there on.

Oct 25, 2009 | 2005 Jeep Liberty

1 Answer

02 jeep liberty won't shift into 3rd or 4th gear.


Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.

Mar 16, 2009 | 2002 Jeep Liberty

1 Answer

Why does my 2002 jeep liberty die when i rev the engine?


its time to replace the idle control valve.

Feb 16, 2009 | 2002 Jeep Liberty

Not finding what you are looking for?
2002 Jeep Liberty Logo

6,916 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...