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Old 07-13-2012, 06:07 AM   #1471
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Originally Posted by Jamantste View Post
He also said that the replacement heads are identical to the ones they are removing and he has heard of possible reengineered heads by the end of the year. Like I said...for what it's worth, not sure.
Well if that's true it sucks! I just read on the AllPar board the fix was implemented in April, I find that a little hard to believe though, based on some other reading I've done. Their article came out in late June I think, so if they fixed it in April why wait till June to announce it?

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Old 07-13-2012, 08:58 AM   #1472
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Build date 4/11, 3800 miles now, no ticking yet....

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Old 07-13-2012, 09:01 AM   #1473
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Originally Posted by demarpaint

Well if that's true it sucks! I just read on the AllPar board the fix was implemented in April, I find that a little hard to believe though, based on some other reading I've done. Their article came out in late June I think, so if they fixed it in April why wait till June to announce it?
Yup it sucks. But I told him that I actually saw an article stating that new heads are being made. He had not heard that.


I'm curios about the revving stopping the tick for a little while. May try that for try heck of it. Maybe it will force a CEL too...
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Old 07-13-2012, 11:56 AM   #1474
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Yup it sucks. But I told him that I actually saw an article stating that new heads are being made. He had not heard that.


I'm curios about the revving stopping the tick for a little while. May try that for try heck of it. Maybe it will force a CEL too...
I doubt it would take them that long to retool, not in this day and age, that they wouldn't be getting those heads until next year. Chrysler bet so heavily on this engine, they want it right, and ASAP. This could destroy then if they wait too long, and they know it. JMO
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Old 07-13-2012, 11:59 AM   #1475
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AllPar board info is pretty interesting to read. It seems the bad heads are from Mexico. Hmmmm. Being a QC guy, I have seen this before in other products.
..In addition to Trenton South, the Pentastar V-6 also is produced in Saltillo, Mexico..
PS - Head replacement fixed the problem I had. -I love my Jeep.
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Old 07-13-2012, 12:03 PM   #1476
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AllPar board info is pretty interesting to read. It seems the bad heads are from Mexico. Hmmmm. Being a QC guy, I have seen this before in other products.
..In addition to Trenton South, the Pentastar V-6 also is produced in Saltillo, Mexico..
PS - Head replacement fixed the problem I had. -I love my Jeep.
That's bad info. The Wrangler engines and heads all come from Trenton South, which is only about forty miles up the road from Toledo.

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Old 07-13-2012, 02:08 PM   #1477
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So you only lifted the engine? That is the only way that the distance between the cabin and the engine would vary.
Yeah I figured if the engine was higher I'd have better performance due to the high altitude air!
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Old 07-13-2012, 03:02 PM   #1478
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Originally Posted by demarpaint

I doubt it would take them that long to retool, not in this day and age, that they wouldn't be getting those heads until next year. Chrysler bet so heavily on this engine, they want it right, and ASAP. This could destroy then if they wait too long, and they know it. JMO
Agreed.
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Old 07-14-2012, 12:35 AM   #1479
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Updated allpar story on the "rare" head problem claims, "At this time, all heads being made are of the new design, and parts have been sent to dealers."

News: Update: Rare Pentastar problem

I hope this is true.
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Old 07-14-2012, 01:35 AM   #1480
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3.6 pentastar head problem update

Cylinder head failures

In June 2012, dealers reported that some engines had premature cylinder head failures, usually on cylinder 2. The problem seems rare considering the number of these engines produced, and nobody was stranded by the problem, which made itself known through the “check engine” light. Customers were generally given loaner cars while the issue was being resolved, though in some cases there was a considerable delay as Chrysler engineers sought root causes and an effective cure. A fix was engineered and entered production in June, and by mid-July, the backlog of replacement heads was being addressed, and all new heads were of the new design
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Old 07-14-2012, 09:49 AM   #1481
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Cylinder head failures

In June 2012, dealers reported that some engines had premature cylinder head failures, usually on cylinder 2. The problem seems rare considering the number of these engines produced, and nobody was stranded by the problem, which made itself known through the “check engine” light. Customers were generally given loaner cars while the issue was being resolved, though in some cases there was a considerable delay as Chrysler engineers sought root causes and an effective cure. A fix was engineered and entered production in June, and by mid-July, the backlog of replacement heads was being addressed, and all new heads were of the new design
My jeep has a build date of June. I wonder if I have the updated head.
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Old 07-14-2012, 11:38 AM   #1482
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Originally Posted by i82much
How long does the sound go away after you rev your engine?
Usually the ticking goes away completely and does not return until the next time I get into the jeep and start the engine. It lasts for the duration of that one singular driving session. And for that time it purrs real nice.

It's very weird. I'd like to hear if others can stop the tick by doing this. It's by no means a proper fix, but it may shed some light on how and why it ticks.
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Old 07-14-2012, 05:02 PM   #1483
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I guess now that the fix is in place a person with a 2012 Wrangler ought to hope to hear the ticking ASAP. In other words, get it out of the way and done with while the vehicle is under warranty and sort of new. Otherwise it's kind of ticking time bomb without a dial. You don't know when it's going to go off. I think it's going to cloud the resale value of 2012 models.
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Old 07-14-2012, 05:08 PM   #1484
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I guess now that the fix is in place a person with a 2012 Wrangler ought to hope to hear the ticking ASAP. In other words, get it out of the way and done with while the vehicle is under warranty and sort of new. Otherwise it's kind of ticking time bomb without a dial. You don't know when it's going to go off. I think it's going to cloud the resale value of 2012 models.
Nah...The vast majority of people do not frequent forums or read up on vehicles for that matter, so the resale value for the 2012's will be like any other Jeep Wrangler.

I also don't think every head on the 3.6 is tainted because if they are Chrysler will end up bankrupt as well over a million Pentastars have been made by now and are in almost every vehicle Chrysler makes.
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Old 07-14-2012, 07:43 PM   #1485
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Now does this affect all 2012s in the 7-11 to 1-12 date range that were made across all Chrysler factories that make wrangler or just the ones from the factory in Mexico?
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Old 07-14-2012, 08:03 PM   #1486
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Now does this affect all 2012s in the 7-11 to 1-12 date range that were made across all Chrysler factories that make wrangler or just the ones from the factory in Mexico?
No Wrangler Pentastars were made in Mexico. All are made at the Trenton South Engine Plant in Trenton, Ohio.

Build dates with potential for bad heads look to be 7/11 through about 6/12, IF the allpar article is accurate.
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Old 07-14-2012, 08:07 PM   #1487
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Now does this affect all 2012s in the 7-11 to 1-12 date range that were made across all Chrysler factories that make wrangler or just the ones from the factory in Mexico?
July 2011 through April of 2012 based on forums members reports. The issue has nothing to do with Mexico. The issue is with the tooling machines used to manufacture the heads. The new heads are supposed to be in production and new heads are being shipped to the dealers.
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Old 07-15-2012, 03:01 PM   #1488
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I've sold my Jeep so I really don't have a stake in this any more but I am following the continuing saga of the Pentastar head problems with great interest.

So, Chrysler has re-designed and re-tooled to produce a different cylinder head as a result of all the complaints. That must mean that this was deemed to be design problem, right? If that is true, then shouldn't ALL of the cylinder heads of the original design be defective? If it had been a manufacturing problem, then there might be some good heads and some bad ones, but wouldn't a design problem include ALL of the heads?

I'm confused. I wish Chrysler would come out with some detailed information as to what the problem really is/was.

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Old 07-15-2012, 03:31 PM   #1489
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I've sold my Jeep so I really don't have a stake in this any more but I am following the continuing saga of the Pentastar head problems with great interest.

So, Chrysler has re-designed and re-tooled to produce a different cylinder head as a result of all the complaints. That must mean that this was deemed to be design problem, right? If that is true, then shouldn't ALL of the cylinder heads of the original design be defective? If it had been a manufacturing problem, then there might be some good heads and some bad ones, but wouldn't a design problem include ALL of the heads?

I'm confused. I wish Chrysler would come out with some detailed information as to what the problem really is/was.

Tomster
I'm worried about that myself. I'm waiting on one head, but was told I had misfires in cylinders 2, 5 and 6.
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Old 07-15-2012, 03:59 PM   #1490
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Wish everyone would include build dates and mileage on each post. I monitor this but can't go back 50 screens to see your original info.

I have a build date of 10/11 with 16k miles with a "little" tick. Believe me I do not baby it and push it hard sometimes. If I can see both ways for at least a mile I let it eat!
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Old 07-15-2012, 03:59 PM   #1491
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I'm worried about that myself. I'm waiting on one head, but was told I had misfires in cylinders 2, 5 and 6.
That sucks! That means you have problems on both sides of the engine. With any luck you have a bad coil pack on the right side of the engine.
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Old 07-15-2012, 09:14 PM   #1492
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I've sold my Jeep so I really don't have a stake in this any more but I am following the continuing saga of the Pentastar head problems with great interest.

So, Chrysler has re-designed and re-tooled to produce a different cylinder head as a result of all the complaints. That must mean that this was deemed to be design problem, right? If that is true, then shouldn't ALL of the cylinder heads of the original design be defective? If it had been a manufacturing problem, then there might be some good heads and some bad ones, but wouldn't a design problem include ALL of the heads?

I'm confused. I wish Chrysler would come out with some detailed information as to what the problem really is/was.

Tomster
It is not hard to figure out. Chrysler is trying hard to quiet the "issue" at the lowest cost possible, and as little PR damage as possible. They are saying the best line to keep cost and PR damage to a minimum. But it is becoming apparent that this is going to be a bigger and longer problem than they can control, as they are not going to just replace the heads on every Wrangler with the bad design (as they should). And as it is not quite a "safety" issue, no government agency will likely force them too. In my opinion they have just decided to quietly fix them as they break, hope most at least outlast the warranty, fix the flaw going forward, and let the '12s take the hit on ratings, reviews, resale if it goes on blast with the reviewers. The bean counters rule on corporate decisions, not customer satisfaction. Of course all this is just my opinion and I hope they make me wrong and do what is right. By the way, I own an '11 JK, loving it, but Chrysler should make it right for those who took the risk in faith with them on the new build. I almost did.
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Old 07-16-2012, 09:22 AM   #1493
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I've sold my Jeep so I really don't have a stake in this any more but I am following the continuing saga of the Pentastar head problems with great interest.

So, Chrysler has re-designed and re-tooled to produce a different cylinder head as a result of all the complaints. That must mean that this was deemed to be design problem, right? If that is true, then shouldn't ALL of the cylinder heads of the original design be defective? If it had been a manufacturing problem, then there might be some good heads and some bad ones, but wouldn't a design problem include ALL of the heads?

I'm confused. I wish Chrysler would come out with some detailed information as to what the problem really is/was.

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Old 07-16-2012, 04:42 PM   #1494
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Regarding this tick... If there was a problem with a cylinder head and you hear the tick, wouldn't the tick get louder as you accelerate? Please only answer if you know for sure. Rather stay away from opinions. Looking for a mechanic or knowledgeable person. Who knows for sure. Thanks guys.
Prior to my vehicle's head replacement, the tick definitely got louder with acceleration.
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Old 07-16-2012, 04:49 PM   #1495
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So my rubi was made in June 2012. I should be ok right?
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Old 07-16-2012, 06:29 PM   #1496
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Originally Posted by Up Hill Bill View Post
Updated allpar story on the "rare" head problem claims, "At this time, all heads being made are of the new design, and parts have been sent to dealers."

News: Update: Rare Pentastar problem

I hope this is true.
Me too. CEL came on again, going in Wednesday. Might still be evap leak.

As for the ticking, mine is still pretty minor @ 12,500 miles and a build date of July 2011.

Question 1: do the parts guys have a way to know the manufacture date of the parts? If I do have a misfire, I plan to ask them to do everything they can to make sure it's a head that was manufactured as recently as possible. Hell, I'd even agree to wait to make sure I got one manufactured this week or later, just to be sure.

Question 2: does this issue impact gas mileage? Because mine dropped this past week. I know it's not cause of the evap leak, that does not impact mpg as far as I know.
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Old 07-16-2012, 07:13 PM   #1497
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I wouldn't be so sure all 2013 will be corrected. There hasn't been any official statement. I haven't seen anyone state their dealer got a a new fixed head. Even if there is a new head who says it really fixes the problem completely. Wouldn't a discounted 2012 with lifetime warranty be safer bet?
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Old 07-16-2012, 07:16 PM   #1498
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I wouldn't be so sure all 2013 will be corrected. There hasn't been any official statement. I haven't seen anyone state their dealer got a a new fixed head. Even if there is a new head who says it really fixes the problem completely. Wouldn't a discounted 2012 with lifetime warranty be safer bet?
Sounds like 2013 envy. Mmmmm
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Old 07-16-2012, 07:27 PM   #1499
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Called Chrysler today, I got an appointment to have it brought it but they said they'd need it for a few days. So I said, where's my rental? The dealer referred me to Chrysler who basically said take it into the dealership first, AFTER they have a look we can talk about rentals. I brought up all of the reports on the internet with this very issue to the reps at Chrysler and of course they said there was no known issues with the wranglers.

I only have 1 vehicle so I can't wait a couple days for the dealership to do a leak down test or whatever they are putting people through these days. Hopefully they can turn this around quick, us single guys are left stranded when this stuff happens =/
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Old 07-16-2012, 07:30 PM   #1500
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Originally Posted by g8trdad

Prior to my vehicle's head replacement, the tick definitely got louder with acceleration.
Thank you. Mine disappears as I accelerate and is a very low tick which I'm starting to think is normal.

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