Dilemma ~ thoughts? - Rubicon Owners Forum
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post #1 of 40 (permalink) Old 10-27-2017, 04:12 PM Thread Starter
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Dilemma ~ thoughts?

2005 Jeep Rubicon LJ 4.0

2nd Gen without test port on fuel rail

130K

Initial issue is jeep threw a camshaft position error SEL illuminated engine code P019

engine would not rev past 2500rpm would loose power studdering suggesting timing issue

idled like a kitten no engine noises etc

shop #1 replaced crankshaft position sensor, camshaft position sensor, TPS sensor, verified flywheel was not missing teeth, & OPDA

shop#2 Auburn, WA Jeep dealer Raped (charged) me 2K for a new PCM install (BBB ~ Complaint ID: 12445933 & Complaint ID: 12466326)

Issue still remained

I wanted the root cause to be fixed which is why I took it to pros vs just throwing parts to try to fix issue

but instead I paid about what the root cause would have cost me figuring out the issue

I myself then swapped out MAP sensor, verfied 02 sensors, CAT operation & fuel pump then retimed OPDA

noticed it was wayyyy out? hmm

Started jeep up & it ran flawless until I let engine compression slow from redline

would not start & lost its time again

pulled shop #1 replaced with less than 1K miles on OPDA & noticed significant wear



somthing was causing this?
oil pump drag?
oil pump OPDA interface?

https://photos.app.goo.gl/mUzfkrSCiz8UFa423

then noticed cam worm gear was severly worn -jumping teeth?

https://photos.app.goo.gl/87cds2SYvHef5Tc63

looks like I need a new engine :-/

https://photos.app.goo.gl/7VcxC1Uez4khy9dt2

Im concentious of keeping matching numbers for classic car status as I bought the Jeep new & rebuild OE block, buy crate motor, or just trade up to JK but dont like dimensions of new jeeps



thoughts?

05 LJ Rubicon Sahara
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post #2 of 40 (permalink) Old 10-28-2017, 08:38 AM
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How much emotional attachment do you have to your Jeep?

2014 JKU, JKS lift,Poison spyder flares, bombshell covers,Rancho D2 control arms, JKS adjustable track bars, 35" Tires. GrabBars, Crawler Conceptz rear bumper, Smitty front bumper, Winch. Rough Country inner fenders, Teraflex Disco Mud Flaps
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post #3 of 40 (permalink) Old 10-28-2017, 09:12 AM
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Time to re-power. I doubt very much matching numbers mean anything on a Jeep unlike classics (Corvettes, 55 Chev, 57 Chev, etc.)
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post #4 of 40 (permalink) Old 10-28-2017, 11:47 AM
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Keep the 04 and rip out the 4.0 motor...

Install a new V-8
i`ve owned to JK`s now ....wish I had never sold my 03 Rubi

it`s a Jeep ....no one cares about matching numbers in my humble opinion
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post #5 of 40 (permalink) Old 10-28-2017, 12:18 PM
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My vote goes to Re-Power, I would like to replace my 4.0 with a diesel so I am a little bias.
Pros: Lots of torque and great fuel economy.
Cons: Cost lots of money. Lol
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post #6 of 40 (permalink) Old 10-28-2017, 12:18 PM
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Bionicman,

Just for discussion purposes. I have pondered a replacement motor as I have had issues on my 05 Rubicon.

A used motor with high mileage but guaranteed to run can be found here for less than a grand.
http://www.buyusedengine.com/used_en...&search=Search

A rebuilt motor is less than 2 grand. https://www.ebay.com/itm/1999-06-WRA...9RcfOi&vxp=mtr

How much is a V8? Think that is a major investment and time consuming to make it work right.

2005 Rubicon
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post #7 of 40 (permalink) Old 10-28-2017, 02:30 PM
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Quote:
Originally Posted by walldo View Post
My vote goes to Re-Power, I would like to replace my 4.0 with a diesel so I am a little bias.
Pros: Lots of torque and great fuel economy.
Cons: Cost lots of money. Lol
Are you referring to this?

https://cumminsengines.com/repower.aspx

I've been contemplating one for my Scrambler.

Does anyone have input on a stroker build?
This might be an option if Bionicman is looking to rebuild his 4.0.
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post #8 of 40 (permalink) Old 10-28-2017, 03:23 PM
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Quote:
Originally Posted by FLLJ View Post
Are you referring to this?

https://cumminsengines.com/repower.aspx

I've been contemplating one for my Scrambler.

Does anyone have input on a stroker build?
This might be an option if Bionicman is looking to rebuild his 4.0.
Thats one option, or a cummins 4BT, or a swap in a CRD out of a 04 or 05 Liberty. All options are on the table, and all are a little costly at this time.
The 4BT is a heavy little motor, the new 2.8 from cummins is expensive, the swap from a Liberty is very extensive and requires major surgery of the wiring harness and a donor vehicle for all the needed electronics. All would require a new transmission.

06 LJ Rubicon with a couple upgrades
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post #9 of 40 (permalink) Old 10-28-2017, 04:34 PM
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Quote:
Originally Posted by walldo View Post
Thats one option, or a cummins 4BT, or a swap in a CRD out of a 04 or 05 Liberty. All options are on the table, and all are a little costly at this time.
The 4BT is a heavy little motor, the new 2.8 from cummins is expensive, the swap from a Liberty is very extensive and requires major surgery of the wiring harness and a donor vehicle for all the needed electronics. All would require a new transmission.
I believe the new cummins is a bolt-in affair that uses the stock transmission.

https://cumminsengines.com/repower.aspx
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post #10 of 40 (permalink) Old 10-28-2017, 05:01 PM
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The '05 and '06 OPDAs are junk. They start to bind and wear the cam and OPDA gears. If you didn't run it without oil pressure all you need is a new cam and lifters and an aftermarket Dorman or Crown OPDA.






Sounds like they pulled the old worn OPDA and didn't check the cam gear. The worn cam gear ate your new OPDA.
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