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Old 06-28-2012, 10:50 PM   #1351
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How do you find the build date?
its on the MFG sticker in the drivers side door jam.....look for the part that sayd MDH...it stands for month/day/hour...mine says something like 122012...it will be interpreted as December 20th at the 12th hour.
Hope that helps

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Old 06-29-2012, 05:20 PM   #1352
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Definitely. Mine is 013112.

Great. Dude was rushed because he was hungry. That explains a lot...

At least it was a Tuesday and not a Friday.

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Old 06-29-2012, 05:38 PM   #1353
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So have they narrowed this problem down to a particular supplier, date of manufacture or anything at all? Or are we all just waiting for it to inevitably happen to us? I'm at 11k and was built on 10/09/11 I hammer the piss out of it. Wonder how long before mine blows up.
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Old 06-30-2012, 10:04 PM   #1354
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Had a small conversation with my service adviser and parts manager today. They both admitted Chrysler does acknowledge the issue, but isn't really telling them anything more. The RL in front of the cylinder part number stands for re-labled. (He hadn't ever heard of RE.) He said its used when they make a change to a part, but it happens all the time to different stuff. They both agreed the heads they are getting are probably repaired ones, which they both thought was better.

Also, most of the head replacements they've been seeing at this dealership are rental cars (they have a decent contract with Enterprise near them). It is a bunch of models though. He showed me some of the current shop orders he has in for head replacements, Durango, T & C, wrangler, etc. So it is not just us! He also hasn't seen anyone come back yet from a replacement, even though we've seen a couple reports of that online.
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Old 06-30-2012, 10:44 PM   #1355
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The check engine light came on my JK with 12,500 Miles was purchased in Oct 2011. I was out of town for a few weeks and the wife was driving it she said the light went out once but came back on after a few trips and the ECO light no longer comes on. Wife says "its ok I read the ownerís manual and itís probably just a loose gas cap or bad gas".

I drive it the next day and noticed it was idling a little rough. Take it to an auto parts place and have them read the code, "P0302", Number 2 Cylinder Misfire. The guy then says his ďrealĒ job during the week is a mechanic at a Dodge dealership and goes on to tell me about the head problem the 3.6's are experiencing. Oh great thatís the first Iíve heard of this problem. I get home and check out the forum and sure enough I read this stuff about ticking and cylinder head replacement. Never did hear much of a ticking sound from the engine itís always been pretty noisy to begin with.

Monday I take the Jeep to the dealer I purchased it from thinking they are going to have it for awhile but all they did was a software update. It clears out the code, smoothes out the engine and the ECO light works again. Phew, Iím thinking that fixed the problem. Not so fast the next morning the light comes back on. A friend shows me how to read the code on the dash (set the trip meter to Trip B then turn the key quickly to the accessory position three times), another P0302 code. Not happy with the results from the service dept I purchased the Jeep from I drop it off at another dealer closer to my home and leave it with them overnight. The next day they tell me I need a new head, Iím number 15 on the national waiting list and it will take 3 weeks to get one in.

I guess overall only 15 other 3.6ís waiting for a new head is not so bad but itís really crappy when it happens to my Jeep. Iím just glad it didnít happen during deer season. I donít think Enterprise would be too happy with me loading a deer in the trunk of a Chrysler 300.
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Old 07-01-2012, 08:10 AM   #1356
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Curious to me how it's always 3 weeks or so right under the 4 week lemon law limit. Curious indeed. Then again not really curious at all...
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Old 07-02-2012, 07:32 AM   #1357
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Got word from a friend that works for Chrysler about the issue. Well, more about the heads that are being put on to replace the bad ones. They're not redesigned. They're new old stock. So, in other words, you're getting the same type of head with the same machining problem. The thing is that not all of them exhibit the issue. So Chrysler is gambling with their old stock. A new head with the design flaw fixed is in current production and 15-20% of those being produced are going in to the stock pool to replenish it. He also said that they are prepared to have to replace some of these heads a second time.

Just thought I'd pass this along.
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Old 07-02-2012, 07:51 AM   #1358
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Got word from a friend that works for Chrysler about the issue. Well, more about the heads that are being put on to replace the bad ones. They're not redesigned. They're new old stock. So, in other words, you're getting the same type of head with the same machining problem. The thing is that not all of them exhibit the issue. So Chrysler is gambling with their old stock. A new head with the design flaw fixed is in current production and 15-20% of those being produced are going in to the stock pool to replenish it. He also said that they are prepared to have to replace some of these heads a second time.

Just thought I'd pass this along.
Kind of stupid, but typical of the auto industry if you consider the cost of a cylinder head. I wonder if they plan on gambling with the 2013's until they use up all their new old stock.
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Old 07-02-2012, 08:35 AM   #1359
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how can there even be old stock when these heads were on national backorder for months?
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Old 07-02-2012, 09:26 AM   #1360
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I'm dropping my Jeep off at the dealership tomorrow afternoon, and will be leaving it there for a few days. They will be doing an exhaust leak down test and lifter bore measurement, at the request of my Customer Care Manager. Hopefully the results of these tests will prompt them to finally make the cylinder head replacement.
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Old 07-02-2012, 10:06 AM   #1361
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I'm dropping my Jeep off at the dealership tomorrow afternoon, and will be leaving it there for a few days. They will be doing an exhaust leak down test and lifter bore measurement, at the request of my Customer Care Manager. Hopefully the results of these tests will prompt them to finally make the cylinder head replacement.
good for you hbgirl! if you have a faulty head you will know very soon. if it fails the test you are guaranteed a head replacement.
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Old 07-02-2012, 10:42 AM   #1362
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good for you hbgirl! if you have a faulty head you will know very soon. if it fails the test you are guaranteed a head replacement.
Keeping my fingers crossed! My CCCM calls me once a week to check in so when she called last week, I mentioned the tests to her (after learning about them here), and she took it up on herself to request them from the dealership. I have to say that opening a case with CCC really was a good idea. I don't think any of this would be happening w/o it.
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Old 07-02-2012, 03:12 PM   #1363
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Do you think they fixed the problem going forward? We blew through the January build dates.
Mine was Oct2011 build date. Replacing the head fixed the problem. I do not know if, or what date, they pulled the defective heads off the line. Hmm, but I will ask my friend Zammy in Detroit. Good Question.
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Old 07-02-2012, 09:01 PM   #1364
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Exclamation 2012 Pentastar Rubicon

I got my first Jeep, a 2012 Rubicon Unlimited in the fall of 2011. It is now getting a new left cylinder head and the dealer has had it almost 2 weeks. I had taken it to the dealer 2 other times; once the light went off by itself the other they said i needed the computer upgrade. This time they are waiting on the head. It has been there since June 23 and they are saying the head won't even be in until July 10.
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Old 07-02-2012, 09:36 PM   #1365
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Originally Posted by rtguy View Post
its on the MFG sticker in the drivers side door jam.....look for the part that sayd MDH...it stands for month/day/hour...mine says something like 122012...it will be interpreted as December 20th at the 12th hour.
Hope that helps
I think your reading this wrong I think its month/day/year everyone is ending in a 11 or a 12 so unless the do nothing all day and then cram them all out in the 11th and 12th hour of the day I think its year of the build. now what this build date dose not say to me is when the engine its self was built. Im sure they get a load of engine's already pre made and shipped in from wear every they are made.
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Old 07-02-2012, 10:57 PM   #1366
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I think your reading this wrong I think its month/day/year everyone is ending in a 11 or a 12 so unless the do nothing all day and then cram them all out in the 11th and 12th hour of the day I think its year of the build. now what this build date dose not say to me is when the engine its self was built. Im sure they get a load of engine's already pre made and shipped in from wear every they are made.
sorry bud but you are 100% WRONG. mine says 12th hour. Logic dictates that my JK was not built in December of 2012 as my Month/Day/Hour reads 122012....unless of course mine was delivered through a time warp.

The MDH sticker is common knowledge. Here's a few other examples. A quick google search will set you at ease.

http://www.ehow.com/how_7468311_date...ram-truck.html

http://www.vipertruckregistry.com/VIN_MDH.html
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Old 07-02-2012, 11:22 PM   #1367
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I think your reading this wrong I think its month/day/year everyone is ending in a 11 or a 12 so unless the do nothing all day and then cram them all out in the 11th and 12th hour of the day I think its year of the build. now what this build date dose not say to me is when the engine its self was built. Im sure they get a load of engine's already pre made and shipped in from wear every they are made.
rtguy is right about MDH (Month-Day-Hour)

For example, mine was built July 20th, 2011, in the 00 hour:

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Also, Pentastar engines for Wranglers are all assembled in Trenton, Michigan, and shipped to the Wrangler assembly plant 40 miles away, in Toledo, Ohio. I doubt they have piles of engines sitting around. Just in time logistics are standard in modern plants like these. The build date for your Jeep is most likely very close to the build date for your engine.
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Old 07-03-2012, 07:24 AM   #1368
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how can there even be old stock when these heads were on national backorder for months?
You have to realize this motor was in production since 2010. It was used in the Caravan and Grand Cherokee for the 2011 MY. Both of those vehicles are having the same problem. It's a lot larger scale issue than you might realize. Only a fraction of vehicle owners are reporting it online. The plant has a warehouse with heads they've already manufactured. A percentage is used for repair orders and the rest are for new engine production. So, they are pulling from that inventory for these repairs. FIFO (first in, first out). National backorder is another term for "we're getting these heads out as fast as possible, but preparing the orders for shipment takes time going through all the corporate red tape".

So, to assume when ones vehicle is taken to the dealer with the issue that the part will be shipped the next day is just not the case given the scale of the issue affecting a vast amount of vehicles.

It is what it is. They're still shipping defective heads in the hopes that some won't exhibit the issue. Some do not exhibit the issue until 30-40k miles. So, it's a gamble and waiting game.
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Old 07-03-2012, 07:28 AM   #1369
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Originally Posted by Up Hill Bill

rtguy is right about MDH (Month-Day-Hour)

For example, mine was built July 20th, 2011, in the 00 hour:

Also, Pentastar engines for Wranglers are all assembled in Trenton, Michigan, and shipped to the Wrangler assembly plant 40 miles away, in Toledo, Ohio. I doubt they have piles of engines sitting around. Just in time logistics are standard in modern plants like these. The build date for your Jeep is most likely very close to the build date for your engine.
You all got me freaked with this engine ticking. I went on you tube and searched. There was a guy who posted a before and after head replacement. Sorry to say engine sounded the same. I recorded mine as well. Very light tic sound if standing close to it but sounds kinda normal to me. I only drive about 8k miles a year.

Called the dealer this morning and spoke to the guy I know in servicing. He has never heard of this yet and has had not one customer call until me. I'm going by Thursday for him to listen to the engine. I doubt if he hooks her up it will throw a code at this point and it may be 3yrs based on what you all are saying. I'll post back after I leave there Thursday.
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Old 07-03-2012, 07:46 AM   #1370
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Looks like I'm throwing myself into this thread. 11k & 3 P0304 codes in 2 weeks. They flashed the PCM last week and within 5 miles it was back on. I have no ticking, horrible gas mileage (down about 3 mpg) and right after the PCM flash it was idling rough but is ok now.

I opened a case with CCC just to be on top of it, my dealer has been pretty good so far. My main concern is they aren't going to give me a loaner or a rental, this Jeep is my DD, I have nothing else. The woman that opened my case said the dealer should have a loaner for me, if not to call them back and Chrysler will see what they can do about a rental.

The Jeep goes in on Friday, I'm assuming they'll be keeping it and I'm not happy I'm going to miss my wheeling trip this weekend, but it is what it is I guess.
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Old 07-03-2012, 08:53 AM   #1371
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At 0730 this morning, I get 3 lengthy text messages in a row from a salesman at the dealership that I've been documenting my tick problem at. He saw that I have a service appt for today and apparently got my cell # from there. He introduces himself, asks me if there's anything different I'd like on my Jeep, maybe a different color, 4 doors insead of 2, leather interior, etc.

I couldn't help but respond with: an engine that doesn't have cylinder head problems after 5K/6 months
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Old 07-03-2012, 08:58 AM   #1372
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That might be asking a lot!

I'd love a new Jeep - I'm kicking myself for not going with a Rubi. Maybe my dealership will screw this up and I'll be in luck.
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Old 07-03-2012, 09:09 AM   #1373
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That might be asking a lot!

I'd love a new Jeep - I'm kicking myself for not going with a Rubi. Maybe my dealership will screw this up and I'll be in luck.
Haha, yeah. The conversation went on from there; I just couldn't believe he was trying to sell me a new Jeep (or any new car for that matter). The last thing I told him was: I love my Jeep, and have quite a bit of $$ invested with upgrades; I just want her fixed.

Good luck with yours! And talk to your Case Manager about the loaner/rental. I don't have the extended warranty, but she has said they will provide a rental when my Jeep eventually gets the replacement. Honestly, Chrysler needs to step it up regarding this issue.
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Old 07-03-2012, 09:19 AM   #1374
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Haha, yeah. The conversation went on from there; I just couldn't believe he was trying to sell me a new Jeep (or any new car for that matter). The last thing I told him was: I love my Jeep, and have quite a bit of $$ invested with upgrades; I just want her fixed.

Good luck with yours! And talk to your Case Manager about the loaner/rental. I don't have the extended warranty, but she has said they will provide a rental when my Jeep eventually gets the replacement. Honestly, Chrysler needs to step it up regarding this issue.
Yea, like you, I have so much invested in mods it would really suck. But I'd be willing. The rep sounded like even if the dealership wouldn't give me a loaner Chrysler would help me out. They better.
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Old 07-03-2012, 11:09 AM   #1375
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You have to realize this motor was in production since 2010. It was used in the Caravan and Grand Cherokee for the 2011 MY. Both of those vehicles are having the same problem. It's a lot larger scale issue than you might realize. Only a fraction of vehicle owners are reporting it online. The plant has a warehouse with heads they've already manufactured. A percentage is used for repair orders and the rest are for new engine production. So, they are pulling from that inventory for these repairs. FIFO (first in, first out). National backorder is another term for "we're getting these heads out as fast as possible, but preparing the orders for shipment takes time going through all the corporate red tape".

So, to assume when ones vehicle is taken to the dealer with the issue that the part will be shipped the next day is just not the case given the scale of the issue affecting a vast amount of vehicles.

It is what it is. They're still shipping defective heads in the hopes that some won't exhibit the issue. Some do not exhibit the issue until 30-40k miles. So, it's a gamble and waiting game.

all speculation...allpar says that the "new" heads are being produced and are in distribution. they are a reliable information source. what do you have to back up your specualtive statements such as "they're still shipping defective heads"?

So you are saying that the backorder is due to shipping logistics? thats a joke.

maybe this will help.

Definition of 'Backorder'

An order for a good or service that cannot be filled at the current time due to a lack of available supply.

not due to a fully loaded warehouse with no shipping labels

Read more: Backorder Definition | Investopedia

yep...lack of supply. that means they don't have the heads. they are building these engines and the heads as fast as they can since, like you stated, it is used in so many vehicles and the demand is greater than the supply at this point.
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Old 07-03-2012, 12:43 PM   #1376
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all speculation...allpar says that the "new" heads are being produced and are in distribution. they are a reliable information source. what do you have to back up your specualtive statements such as "they're still shipping defective heads"?

So you are saying that the backorder is due to shipping logistics? thats a joke.

maybe this will help.

Definition of 'Backorder'

An order for a good or service that cannot be filled at the current time due to a lack of available supply.

not due to a fully loaded warehouse with no shipping labels

Read more: Backorder Definition | Investopedia

yep...lack of supply. that means they don't have the heads. they are building these engines and the heads as fast as they can since, like you stated, it is used in so many vehicles and the demand is greater than the supply at this point.
I get my information direct from a friend that works for Chrysler Corp and a good friend that is a master mechanic installing these heads. He does several a week and has yet to see the newly manufactured head show up. So, if I may ask, where are you getting your sources that the newly manufactured heads are the ones showing up at dealerships? He surely hasn't seen one. He's had several returns for replaced heads starting to tick.

I never said lack of shipping labels. We're talking about a 2 week delay to get the parts shipped out. On top of the other parts their warehouse has to ship out to thousands of dealerships across the country.
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Old 07-03-2012, 12:53 PM   #1377
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several a week? there are tons of dealers that haven't seen one yet.

Allpar is the source...check it out yourself....the link to the article stating the facts is posted a page or so back in this thread.

p.s. the shipping label line was sarcasm....don't take it personally...lol

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Old 07-03-2012, 02:10 PM   #1378
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several a week? there are tons of dealers that haven't seen one yet.

Allpar is the source...check it out yourself....the link to the article stating the facts is posted a page or so back in this thread.

p.s. the shipping label line was sarcasm....don't take it personally...lol

News: Fix coming for rare Pentastar problem
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Old 07-03-2012, 06:27 PM   #1379
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Also...information on Pentastar head manufacturing from 2010.
Chryslerís New Pentastar V-6 Plant Green, Highly Automated

I believe the issue is identified and the fix is in process at the manufacturing level. Typically new parts would first go to the line to stop the bleeding followed with sparing. I'd feel it reasonable to expect if I had a 2013 on order that the new part would be in it. They will start manufacturing 2013's in the next 2-3 weeks I think.
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Old 07-03-2012, 07:55 PM   #1380
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Also...information on Pentastar head manufacturing from 2010.
Chryslerís New Pentastar V-6 Plant Green, Highly Automated

I believe the issue is identified and the fix is in process at the manufacturing level. Typically new parts would first go to the line to stop the bleeding followed with sparing. I'd feel it reasonable to expect if I had a 2013 on order that the new part would be in it. They will start manufacturing 2013's in the next 2-3 weeks I think.

agreed. people act like they KNOW the facts. Chryslerdoes NOT have a warehouse full of extra cylinder heads waiting to go out for repairs. That is not going to be a high stock item as normally they don't need replacing often if ever.

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