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Old 01-18-2014, 09:19 AM   #1
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Awaiting catastrophic failure

OPDA, CPS Squealing and awaiting a catastrophic failure. Beware if you own a 2005 or 2006 TJ. Never read much about any other years having the issue?.?. Mine is a 2006 and I took care of this quickly. Didn't drive it after it started making the noise in fear of the failure that would be devastating. I had it towed to dealer and it was covered under warranty. My fear is that it will likely happen again.

Video of OPDA Issue..

OPDA or CPS Ticking Time Bomb - YouTube

Anyone have this issue and let it go to long? Destroy the cam? if not, what did you guys do..replace with factory? Aftermarket? Modify?

Thanks!

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Old 01-18-2014, 11:49 AM   #2
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Lots of threads on here about the '05-'06 OPDA issue. Congrats on getting it fixed under warranty but most on here will tell you the factory replacement will fail as well. I replaced mine with the Dorman unit from RockAuto. I'm not much of a mechanic but it was an easy swap. I did that and new plugs in about an hour (1.5?).

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Old 01-18-2014, 09:17 PM   #3
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Mine is a 2004 , what exactually is the part problem called and used for what ? Sure is a nasty sound , I know a little about car stuff , never heard that noise !!
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Old 01-19-2014, 07:47 PM   #4
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My son's 2005 Sport had this problem last fall. Laughing monkeys. We bought the Doorman unit, too. Around $190, I think. Took about 20 minutes to install.
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Old 01-19-2014, 10:29 PM   #5
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Now that's a Mall Crawler if I've ever seen one. I've never seen a jeep engine that clean!
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Old 01-19-2014, 10:44 PM   #6
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Mine 05 made the laughing monkey noise for first time today at 60,008 miles. Parked it and ordered the dorman. Will be here mid week, $79 + shipping. Nervous about replacing it properly but tried to read as much as i could on it

Not sure why its so much cheaper now at rockauto 689-201 unit
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Old 01-22-2014, 01:25 PM   #7
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Quote:
Originally Posted by frankturbo View Post
Mine is a 2004 , what exactually is the part problem called and used for what ? Sure is a nasty sound , I know a little about car stuff , never heard that noise !!
Quote:

The cam shaft position sensor is also part of the oil pump drive assembly.
The cam has a gear on it, that turns a gear on the cam sensor, which rotates a shaft.
The top of the shaft has a rotating disc that the sensor reads.
The bottom of the shaft inserts into the oil pump and turns it.
So if it gets bad enough, the gear will fail, the shaft wont run the oil pump, and about 2 minutes later your engine will be toast.

03 to 06 Jeeps are VERY prone to have these gears prematurely wear.
There is even an official letter that was issues to dealers on this, called the E05.
For the most part, dealers seem to be replacing these under the drive train warranty.

Symptoms Include:
Ticking
Squeeking/Squealing (especially at startup)
Long Cranks to Start
Low/Rough Idle

The Cause:
Many cam sensor/oil pump drive assemblies made in 04 were defective.
They are not shimmed properly, which causes the gear to ride funny, and not mesh with the cam gear properly.
The eventually causes premature wear on the sensor gear. The cam gear is a harder metal, so typically it wont see nearly as much wear.
Which is a good thing, replacing a camshaft is about a $1100 repair.

You can pull the sensor and visibly check it yourself, BUT.
be aware that this works like a distributor cap, you have to put it back in the EXACT orientation it was.
If its turned slightly, it will be out of time with the cam, and the sensor will read wrong.

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Old 01-22-2014, 01:28 PM   #8
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Originally Posted by Firehound12 View Post
Now that's a Mall Crawler if I've ever seen one. I've never seen a jeep engine that clean!
I picked this jeep up less than a year ago from a guy in central Florida. No road salt = clean engine. Give it time. Love it though. Its stock, yes, for now. Very Very Clean and thats why I snatched it up.
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Old 01-22-2014, 01:29 PM   #9
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Thanks!
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Old 01-22-2014, 06:43 PM   #10
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Just did mine tonight.

Busted knuckles and all. Install went well, hardest part was getting to the hold down bolt. I did swap the oem cam shaft sensor into it knowing some people have had issues with the dorman sensor. Started right up. I did get the P0016 code once it reached 160 degrees which meant the cam shaft sensor was off a few degrees over 7.5, loosened the bolt and turned the opda just a tad. Reset the code by disconnecting the battery each time. Did this 3 times until the no CEL light appeared. Starts better, idles more smoothly, less ticking and no laughing monkeys lol
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Old 01-22-2014, 09:12 PM   #11
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Originally Posted by 05LJTampa View Post
Just did mine tonight. Busted knuckles and all. Install went well, hardest part was getting to the hold down bolt.
I tried to get that dang bolt off with no luck. It's a pain in the a$$. I heard that a 16 point wrench works well, but I don't have one. Oh well. Dealer did it free for me this time, but next time I'll upgrade to the Dorman.

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2006 , cps , jeep , oil , opda

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