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Old 03-27-2012, 11:38 AM   #31
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Lol Jesus Engine. Hopefully the problem isn't too widespread, I would think if it was affecting most or all of the engines we would have heard a lot more about it by now

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Old 03-27-2012, 11:43 AM   #32
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Old 03-31-2012, 10:54 AM   #33
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What was the outcome of this? Found out today that our 12 Sahara JKU (8,600 miles) has to have the head replaced. Engine light came on. At first said a computer update was needed than came on again two days later. Second time read a #2 cylinder misfire code.
i took mine in when my check engine light came on at 14161 miles. took it to the dealer and they found a P0300 code and flashed the computer after finding a TSB 18-007-17 that suggested a flash update. it was good for about a week then came on again yesterday. have to take it back again. i have 14586 on it now and came up with a P0306 code which i think equates to the number 6 cylinder misfiring. Doesn't sound too good. BTW, i got mine in early august and the build sheet has a print date of 19 July. looks like mine might be ready to $hit the bed.....its interesting because i see no loss of power either time. this is going to be fun....not. will keep you guys informed. have to take it in tuesday.

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Old 03-31-2012, 11:45 AM   #34
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I had my head replaced at 1,400 miles as #5 displayed code and misfiring. I was told I got a revised head installed. The service manager said reports of defective heads and replacement heads has been on the rise. My jeep runs great now, with only 2,200 (as it should) but...I would not be suprised to see the other head being replaced in the future. If this is the case, I will demand a new engine. Plenty of warranty left, so....not going to sweat it now. But..will keep a close eye on things.
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Old 03-31-2012, 03:22 PM   #35
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i have been fortunate so far. i've been reading a watching, counting my blessings but guess it finally caught up with me. will be interesting to see how the service folks work it. when i spoke to the dealer service, who seems pretty straight up during the past years and vehicles i've had done there, i mentioned that this is similar to some that have had to have their cylinders or heads replaced/repaired. he said he would have one of his better techs take a look. he seemed to acknowledge it might be a problem. so, i await tuesday. good thing i've got some other vehicles i can use.

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Old 03-31-2012, 04:34 PM   #36
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I wonder of they have identified the core issue and made changes to the most current production vehicles?.....seems like the problems surface with different mileage...some right away others after several thousand miles....are these issues happening to other models sharing the Pentastar? We will be ordering a JKU in the coming months and I really hope they have a handle on this stuff by then...not good....warranty or not.
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Old 04-01-2012, 01:46 AM   #37
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i took mine in when my check engine light came on at 14161 miles. took it to the dealer and they found a P0300 code and flashed the computer after finding a TSB 18-007-17 that suggested a flash update. it was good for about a week then came on again yesterday. have to take it back again. i have 14586 on it now and came up with a P0306 code which i think equates to the number 6 cylinder misfiring. Doesn't sound too good. BTW, i got mine in early august and the build sheet has a print date of 19 July. looks like mine might be ready to $hit the bed.....its interesting because i see no loss of power either time. this is going to be fun....not. will keep you guys informed. have to take it in tuesday.

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Old 04-01-2012, 09:40 AM   #38
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Blackened, thanks for the link. will have to wait and see what the dealer says about mine when i take it in tuesday. i imagine they will take the less expensive steps (for them) in an attempt to ward off the cost of tear down and replacement. fortunately, i only got the P0306 code, not the rest like you.

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Old 04-03-2012, 07:50 PM   #39
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Wow my check engine light came on And I took it to the dealer got it back and they said it needed a computer update. Really my jeep needs to be updated like a freaking iPhone. Anyways went home and guess what the damn light came back on I was hoping mine wasn't gonna be like te rest but I guess not I have to take it back tomorrow. So yea any advice to let the dealer know or anything.
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Old 04-03-2012, 07:59 PM   #40
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Good Lord these things are dropping like flies all with the same symptoms and problems. Chrysler's got a huge problem on their hands me thinks with these new motors.
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Old 04-03-2012, 08:03 PM   #41
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From the forums I have been reading, it sounds like most of the issues are from JK's that were built between September and November of last year. Has anyone experienced this on a January or later built JK? I know most won't have too many miles on them, but there has to be guys with 3500-5000 miles for Jeeps built after the first of the year. Something to be watching for, but I hope Chrysler has this resolved by now in production.
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Old 04-03-2012, 08:11 PM   #42
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I have 8000 miles on my 2012, I can't report any problems. Mine was delivered in July of 2011.

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Old 04-03-2012, 08:12 PM   #43
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what part of the jeep is head,,, are you talking cylinder head, or are you talking cpu or pcm... never heard any part of a jeep called a ''head''
lol haven't been around cars much ay???
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Old 04-03-2012, 08:46 PM   #44
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Wow my check engine light came on And I took it to the dealer got it back and they said it needed a computer update. Really my jeep needs to be updated like a freaking iPhone. Anyways went home and guess what the damn light came back on I was hoping mine wasn't gonna be like te rest but I guess not I have to take it back tomorrow. So yea any advice to let the dealer know or anything.

That sucks! They're following procedure, hoping the computer flash fixes the problem but knowing it won't. I bet you'll be getting a revised cylinder head shortly. Funny thing is they are only revising one cyl head. I wonder what happens when some carbon starts building up in these engines after lets say 40,000-50,000 miles. Will the other head need a revision? Someone in Chrysler engineering messed up with this engine design, big time. I hope they can correct the problem going forward, and in short order, or it could have a major impact on them.
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Old 04-03-2012, 08:54 PM   #45
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People here act like brand new engines never have problems. All manufacturers have problems. Designing an engine is not as easy as a, b, c. Lots of stuff is learned only after extensive testing.

Some manufacturers do more testing that others, but even then, large scale production issue happen (like a bad batch of castings).

The internet and its forums are huge magnifying glasses for any automotive problem.
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Old 04-03-2012, 09:01 PM   #46
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People here act like brand new engines never have problems. All manufacturers have problems. Designing an engine is not as easy as a, b, c. Lots of stuff is learned only after extensive testing.

Some manufacturers do more testing that others, but even then, large scale production issue happen (like a bad batch of castings).

The internet and its forums are huge magnifying glasses for any automotive problem.
A big enough problem NO ONE should have to deal with.
I'd be ripped if this happened to me
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Old 04-03-2012, 09:04 PM   #47
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i took mine in when my check engine light came on at 14161 miles. took it to the dealer and they found a P0300 code and flashed the computer after finding a TSB 18-007-17 that suggested a flash update. it was good for about a week then came on again yesterday. have to take it back again. i have 14586 on it now and came up with a P0306 code which i think equates to the number 6 cylinder misfiring. Doesn't sound too good. BTW, i got mine in early august and the build sheet has a print date of 19 July. looks like mine might be ready to $hit the bed.....its interesting because i see no loss of power either time. this is going to be fun....not. will keep you guys informed. have to take it in tuesday.

cass
Your case is very similar to mine if you read the ticking pentastar thread. Similar build date, similar mileage, and similar codes. Good luck with your fix. I was in a loaner for a week, got it back, and all has been well since.
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Old 04-03-2012, 09:05 PM   #48
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People here act like brand new engines never have problems. All manufacturers have problems. Designing an engine is not as easy as a, b, c. Lots of stuff is learned only after extensive testing.

Some manufacturers do more testing that others, but even then, large scale production issue happen (like a bad batch of castings).

The internet and its forums are huge magnifying glasses for any automotive problem.

True, but here it looks like the extensive testing is at the consumers expense. Also if there are 100,000, 200,000, 400,000 [pick a number] of bad engines already made waiting to be installed, is Chrysler going to scrap them, rebuild them, repair them, or let them out and deal with them as problems arise? We'll never know that's for sure.
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Old 04-03-2012, 09:07 PM   #49
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A big enough problem NO ONE should have to deal with.
I'd be ripped if this happened to me
I agree 100%, I would not be happy with them swapping a head on a new vehicle............
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Old 04-03-2012, 09:11 PM   #50
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Oh, I'd be pissed if it happened to me, but I'd be pissed if anything happened to any car I bought, even if it was the most reliable car in the world (statistically)

And if you really feel this way, the best thing to do is keep driving what you have (given its reliable).
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Old 04-03-2012, 09:55 PM   #51
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Oh, I'd be pissed if it happened to me, but I'd be pissed if anything happened to any car I bought, even if it was the most reliable car in the world (statistically)

And if you really feel this way, the best thing to do is keep driving what you have (given its reliable).
It's time for a change, this is the homework phase. If I feel satisfied with the Chrysler resolution to this problem, I'm a buyer, if not its back to the drawing board. I don't want to make a $35,000+ mistake.
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Old 04-03-2012, 10:10 PM   #52
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True, but here it looks like the extensive testing is at the consumers expense. Also if there are 100,000, 200,000, 400,000 [pick a number] of bad engines already made waiting to be installed, is Chrysler going to scrap them, rebuild them, repair them, or let them out and deal with them as problems arise? We'll never know that's for sure.
This engine isn't new, it's been around since 2010. They've built one million of them as of January 2012. It seems from what I've seen that most of the problems were with engines from July to November 2011, so it looks like a bad batch of heads in that time frame. I haven't heard of any issues with 2012 builds, so it looks like they've solved the issue. I'm sure it was a top priority as it isn't cheap for them to be replacing heads on a frequent basis.
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Old 04-04-2012, 05:42 AM   #53
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This engine isn't new, it's been around since 2010. They've built one million of them as of January 2012. It seems from what I've seen that most of the problems were with engines from July to November 2011, so it looks like a bad batch of heads in that time frame. I haven't heard of any issues with 2012 builds, so it looks like they've solved the issue. I'm sure it was a top priority as it isn't cheap for them to be replacing heads on a frequent basis.
That's good to hear, hopefully when the 2013's roll out they'll have it totally resolved and we'll see if any others have problems. As much as I hate to scrap the idea I will if I don't feel comfortable. Time is on my side this time around. Maybe I'll look for an older one with a 4.0L engine instead, or better yet they'll offer the diesel version a buddy showed me from a German site. A person can dream, LOL
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Old 04-04-2012, 09:02 AM   #54
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How long did it take for your dealer to figure it out. I took my jeep back to the dealer this morning. And e just said nothings popping up no codes. Well my remote start doesn't turn the car on now. So they kept it. I told him it was the cylinder head but he doesn't think so. So what do I do now. Just keep running it till it blows the motor or what.
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Old 04-04-2012, 09:10 AM   #55
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How do you find out when your engine was built?
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Old 04-04-2012, 09:35 AM   #56
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How long did it take for your dealer to figure it out. I took my jeep back to the dealer this morning. And e just said nothings popping up no codes. Well my remote start doesn't turn the car on now. So they kept it. I told him it was the cylinder head but he doesn't think so. So what do I do now. Just keep running it till it blows the motor or what.
Unfortunately they are not going to get paid on your diagnosis of the problem. So yes you'll have to let them fiddle with it until they make their own diagnosis of the problem and then hopefully resolve it.
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Old 04-04-2012, 09:47 AM   #57
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I just went outside and hugged my 'Old-School' 2011 JK Sport "S" 3.8L
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Old 04-04-2012, 10:21 AM   #58
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I just went outside and hugged my 'Old-School' 2011 JK Sport "S" 3.8L
Don't forget to suck on it. Jk ahh these mechanics at the dealer suck
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Old 04-04-2012, 07:57 PM   #59
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People here act like brand new engines never have problems. All manufacturers have problems. Designing an engine is not as easy as a, b, c. Lots of stuff is learned only after extensive testing.

Some manufacturers do more testing that others, but even then, large scale production issue happen (like a bad batch of castings).

The internet and its forums are huge magnifying glasses for any automotive problem.
I spent a few years working at another OEM in one of their engine plants, and I can say that the machining processes and assembly on modern engines is very complex. You have no idea how difficult it is to ensure that the machines stay within the VERY tight tolerances and making sure all the parts play nice with one another. It gave me a very strong appreciation for the design, engineering, and work that goes in to taking the raw, unfinished parts and having a nice new engine come off the end of the line.

Things don't always go as planned, and we worked like hell to ensure that any issues were quarantined and prevent them from getting out. Sometimes issues aren't found until a few get out, but that was certainly a rare exception and not the rule where I worked. I feel for the folks that are having issues with their Pentastar engines, and I really hope Chrysler has their hands around this one. Unfortunately, that is one of the downsides to having an engine that is being used across an entire brand's lineup as volumes and production scale ups are quite large and a small defect can be spread very quickly across the lineup before it gets fixed or identified.

Good luck to those who are having issues, and hope that you get a satisfactory outcome on fixing your new Jeeps. At least we all have a long powertrain warranty to help cover any problems along the way, even though I hope to never have to use it.
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Old 04-05-2012, 04:28 AM   #60
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I spent a few years working at another OEM in one of their engine plants, and I can say that the machining processes and assembly on modern engines is very complex. You have no idea how difficult it is to ensure that the machines stay within the VERY tight tolerances and making sure all the parts play nice with one another. It gave me a very strong appreciation for the design, engineering, and work that goes in to taking the raw, unfinished parts and having a nice new engine come off the end of the line.

Things don't always go as planned, and we worked like hell to ensure that any issues were quarantined and prevent them from getting out. Sometimes issues aren't found until a few get out, but that was certainly a rare exception and not the rule where I worked. I feel for the folks that are having issues with their Pentastar engines, and I really hope Chrysler has their hands around this one. Unfortunately, that is one of the downsides to having an engine that is being used across an entire brand's lineup as volumes and production scale ups are quite large and a small defect can be spread very quickly across the lineup before it gets fixed or identified.

Good luck to those who are having issues, and hope that you get a satisfactory outcome on fixing your new Jeeps. At least we all have a long powertrain warranty to help cover any problems along the way, even though I hope to never have to use it.
I'm patiently waiting for the 2013's to roll out. I'd rather not scrap the plans I have for buying. Would you be fairly certain this issue will be resolved before the 2013's roll out, or think that Chrysler has tons of these engines already made and will use them up first not to waste time and money? Over the years all car companies messed up, and some used the same poorly designed engine for years, and a lot of people got stuck with them as a result. That's in the back of my mind in this case, I'm hoping it's not the case here. Thanks

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