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?

×

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

  • 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?

×

  • 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,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

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

Where is the position of radiator fan relay on jeep liberty 2006


no idea to be honest earlier jeeps had then at the front of the wing down below as i remember ?? newer one would i imagine be in the electrical box under the bonnet near the battery

Dec 02, 2016 | Jeep Cars & Trucks

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

I want to change a 3.7 motor off of 2004 jeep Liberty 2wd in order to fit my 2002 jeep liberty 4wd?


engine swaps are complex as is mixing engines to wrong transmissions.
so both are 3.7L, is that it?
you never said what exacty didnt fit.
the flex plate to TC
or TC to A/T pump side mismatch.
????????
if its the flex then get the correct flex plate.
or call jeep parts? ask them for the right parts
the side of the trans has the trans part number
my guess is all you need is the correct flex plate for engine to TC.

Aug 10, 2015 | 2004 Jeep Liberty

1 Answer

Is there ANY other engine that will fit in a 2002 jeep liberty limited? 3.7L v6... need a whole new engine


3.7L EKG Powertec, engine. SOHC with roller followers,
did you check compression, or just P030x codes???????
and what if its just a stuck valve or collapsed lifter
why not ask for help in diagnosis?
compression bad? on one or more? cylinders, post #
pull the Valve covers, see if there are broken valve springs
or bad cam lobes, or lifter bad? (motion)
if it didnt burn oil , try rebuilt heads.?

ran for 12 years, so what is the mileage>? 300k?
Oil changes, at 5000 ?

the 3.7 may fit...says wiki.
warning, some engine blocks may NOT be same. (filter mounts, engine mounts) check first.
but you can find this at any engine builders web site. (google them)
ive swapped many and engine, even wrong engines.?grin
there are always choices, i always have and had spare cars.
so down time is never an issue for me.
but others yes. (rent a car is one option while fixing another)
1: if the block is bad get a short block.
2: if the heads are bad get yours rebuilt , or exchanged.
3: if you blew the engine to total destruction, pistons hit valves? (rare)
then get a used engine, or buy a rebuilt.
or pull yours and take it to any top machine shop and drop it off.
bingo, fixed and cheap too. no middle man, to rip you.

history.
The 3.7 liter PowerTech V-6 engine is, essentially, the 4.7 V-8 with two fewer cylinders.
then later, morphed to the Pentastar V6. (today's motor)
cast iron block, (lasts long time, easy to bore and rebuild)
no rubberband cam belts, real chain, drive.
2 valves per cyl. making head rebuilds fast and cheaper.
forged pistons, not cheap cast.
MOPAR is not POS.
ask engineer Brian Crothers

I run the 3.8L in my 08 JK.
its a real low tech, push rod motor. (ended in 2011)

id fix mine, if it failed
my guess is it is head failure, , so get the newer
rebuilds with pinned, valve guides and run it.




Jan 10, 2014 | 2002 Jeep Liberty

1 Answer

2002 Jeep Liberty engine swapped with a 2003 Liberty both are 3.7 liter. Engine swap was fine, engine ran, fluids were good but when I took for a test ride it died. No lights, no power, nothing. Does the...


It could be a change in software from 2002 to 2003. You might try to get. Hold of a 2003 black box as the code will most likely be different.

Nov 04, 2013 | Cars & Trucks

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 3.7L Engine Swap to newer 2005 engine


every year the motor had different parts and timing was moved. try and take parts off the old motor. like the fuel rail and the sensors

Jan 07, 2013 | 2002 Jeep Liberty

1 Answer

How to set the timing marks on the cams on a02 jeep liberty 3.7 engine


wow not going to say the job> ?
heads off or what?
2002 Liberty.? KJ car. (USA)
ever seen a real FSM? "factory service manual"
and all those steps? to do work on that engine.

http://colorado4wheel.com/manuals/Jeep/KJ/

here it is , read it, then ask questions?

Jan 04, 2011 | 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

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

6,143 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8140 Answers

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

Answer questions

Manuals & User Guides

Loading...