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Old 05-04-2013, 04:04 AM   #4741
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Warning, don't bail on this post, it's got a funny ending!
I got a little odd info at the dealer today..... So here goes, I took the 2012 JKU (Altitude with AA head as far as I can tell May 12 build) in for her 10,000 mile service, you know oil change, 5 wheel rotation (you got to ask for that, btw) and 30 point blah blah blah. Anyway I asked the service dude if they could listen to the engine I said. "it seems a little loud to me on the drivers side"
{back story, if you've ever read any of my posts on this topic I've always said my Jeep sounds like a "sewing machine" I've always maintained that I'm probably doomed like a lot of us are. I was paranoid at first, but that kinda went away. And I just always have been of the mindset that if it happens, it happens and they will fix it. So today was my first real good chance to bring it up to the service guy..... End back story}
So upon paying for my service he showed me on the ticket that the mechanics indicated that the engine sounded normal. He continued and (I'll paraphrase the service guy) ...... "Yeah they almost always throw a code, we've done about 200 heads" "not just wranglers all vehicles with the new motor"
I'm kinda taken back at this point, most times they are downplaying obvious issues and insted this guy is selling me on a problem! The Service guy continued... "they're not really loud usually, but they throw that code, on drivers side #2". I said... "yeah I've read some stuff about it" He went on and this is where it gets almost comical. He said "You want to see if you got a bad one,? run the hell out of it right when you start it up!" "That can cause it to throw the code" Just get in it and run it hard without warm up. " That will usually do it."
I smiled, paid my bill and left kind of puzzled. I'm still actually a bit puzzled. I thought it was odd. No further words right now........
PS It doesn't sound like I'm going to have any issues getting a replacement if that day should come. "Run the hell out of it"
Truly words to live by. Rolf!

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Old 05-04-2013, 05:20 AM   #4742
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^^ Well at least he was honest.^^

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Old 05-04-2013, 09:16 AM   #4743
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Interesting.
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Old 05-04-2013, 10:12 AM   #4744
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Quote:
Originally Posted by Deepjeep1371 View Post
Warning, don't bail on this post, it's got a funny ending!
I got a little odd info at the dealer today..... So here goes, I took the 2012 JKU (Altitude with AA head as far as I can tell May 12 build) in for her 10,000 mile service, you know oil change, 5 wheel rotation (you got to ask for that, btw) and 30 point blah blah blah. Anyway I asked the service dude if they could listen to the engine I said. "it seems a little loud to me on the drivers side"
{back story, if you've ever read any of my posts on this topic I've always said my Jeep sounds like a "sewing machine" I've always maintained that I'm probably doomed like a lot of us are. I was paranoid at first, but that kinda went away. And I just always have been of the mindset that if it happens, it happens and they will fix it. So today was my first real good chance to bring it up to the service guy..... End back story}
So upon paying for my service he showed me on the ticket that the mechanics indicated that the engine sounded normal. He continued and (I'll paraphrase the service guy) ...... "Yeah they almost always throw a code, we've done about 200 heads" "not just wranglers all vehicles with the new motor"
I'm kinda taken back at this point, most times they are downplaying obvious issues and insted this guy is selling me on a problem! The Service guy continued... "they're not really loud usually, but they throw that code, on drivers side #2". I said... "yeah I've read some stuff about it" He went on and this is where it gets almost comical. He said "You want to see if you got a bad one,? run the hell out of it right when you start it up!" "That can cause it to throw the code" Just get in it and run it hard without warm up. " That will usually do it."
I smiled, paid my bill and left kind of puzzled. I'm still actually a bit puzzled. I thought it was odd. No further words right now........
PS It doesn't sound like I'm going to have any issues getting a replacement if that day should come. "Run the hell out of it"
Truly words to live by. Rolf!
Well did ya run the hell out of it to see if it will code?
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Old 05-04-2013, 10:29 AM   #4745
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well did ya run the hell out of it to see if it will code?
x2. Lol
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Old 05-04-2013, 03:10 PM   #4746
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Mine sounds like it's going to throw a rod for the first 2-3 seconds on a cold start. Then quiets right down. Lifter noise I'm assuming. Has done it since day one. 20k miles and hasn't gotten worse or better. AA head as well.

Meh.
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Old 05-04-2013, 09:09 PM   #4747
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Mine sounds like it's going to throw a rod for the first 2-3 seconds on a cold start. Then quiets right down. Lifter noise I'm assuming. Has done it since day one. 20k miles and hasn't gotten worse or better. AA head as well.

Meh.
Same here. But I figured I would have the service department tell me it's normal on paper.
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Old 05-04-2013, 11:34 PM   #4748
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Originally Posted by Riccochet View Post
Mine sounds like it's going to throw a rod for the first 2-3 seconds on a cold start. Then quiets right down. Lifter noise I'm assuming. Has done it since day one. 20k miles and hasn't gotten worse or better. AA head as well.

Meh.
mine did that before i had my AA head replaced. it didn't change one bit with the AC head.
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Old 05-05-2013, 04:54 PM   #4749
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Originally Posted by Riccochet View Post
Mine sounds like it's going to throw a rod for the first 2-3 seconds on a cold start. Then quiets right down. Lifter noise I'm assuming. Has done it since day one. 20k miles and hasn't gotten worse or better. AA head as well.

Meh.
Mine's only got 1500 miles and it sounds terrible sometimes when I start it cold after it's sat for a couple days.....
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Old 05-05-2013, 06:34 PM   #4750
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Mine's only got 1500 miles and it sounds terrible sometimes when I start it cold after it's sat for a couple days.....
What's the manufacturing date on the door jam?
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Old 05-05-2013, 06:59 PM   #4751
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I'm wondering if/when a company that offers aftermarket engine mods/parts will come out with performance or replacement heads for the 3.6L engine. Something like an, Edelbrock Head, a Trick Flow Head, or a Summit Head. It seems to me there'd be a market for it. I realize there's a warranty to contend with, but they are on the third revision of this head and no one knows for sure if its the fix or not. Maybe someone in the aftermarket can figure it out. LOL
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Old 05-05-2013, 07:17 PM   #4752
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What's the manufacturing date on the door jam?
I need to go look, but mine is a 2012.

Jun 2012
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Old 05-05-2013, 07:49 PM   #4753
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I'm wondering if/when a company that offers aftermarket engine mods/parts will come out with performance or replacement heads for the 3.6L engine. Something like an, Edelbrock Head, a Trick Flow Head, or a Summit Head. It seems to me there'd be a market for it. I realize there's a warranty to contend with, but they are on the third revision of this head and no one knows for sure if its the fix or not. Maybe someone in the aftermarket can figure it out. LOL

problem is the pentastar is a very unique design with the header manifold built in so probably not real easy to do aftermarket.
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Old 05-05-2013, 08:36 PM   #4754
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problem is the pentastar is a very unique design with the header manifold built in so probably not real easy to do aftermarket.
I'm familiar with the design and realize that, but if there's enough of a market anything can be done. There are other companies that use a similar design integrating the intake and exhaust manifold into one unit. Lets call it wishful thinking on my part.
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Old 05-05-2013, 09:31 PM   #4755
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Chrysler has too many of these motors on the street, and sells too many vehicles with it to do nothing. Remember a lot of these motors have a lengthy powertrain warranty so they will fix it. The revision of the head number is evidence in itself. I would bet if this keeps up Chrysler, from a reputation and customer service standpoint will end up extending the warranty on these things like other manufacturers have done with troubled items. I bet you someone at Chrysler has read, and keeps up on this thread.
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Old 05-06-2013, 03:11 AM   #4756
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There might have been some misunderstanding on this one.

The fact is I had/have CEL - P0306 and the problem was/is with the failing valve seats on 6th cylinder (exhaust valves to be specific.


Quote:
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PET77

Wasn't your head problem a stuck intake valve? I seem to remember reading that from one of your posts. If that is the case then you do not have the same problem as the rest of us. The problem that the rest of us are encountering is bad exhaust valve seats and that's causing the ticking and subsequent CEL to come on.

Please confirm....
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Old 05-06-2013, 03:14 AM   #4757
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And yes, I can confirm that the "drive it like you stole it" advice to get the fault code works. Mine came up right after I drove it for some 600 miles at speeds ranging from 85 to 100 mph...
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Old 05-06-2013, 04:39 AM   #4758
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And yes, I can confirm that the "drive it like you stole it" advice to get the fault code works. Mine came up right after I drove it for some 600 miles at speeds ranging from 85 to 100 mph...
It appears like you mentioned earlier you have the same problem, and it spilled over into 2013.
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Old 05-06-2013, 06:03 AM   #4759
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Forgive me if this has already been mentioned, but is it an AB or AC head?
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Old 05-06-2013, 06:14 AM   #4760
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IIRC his dealer told him he had the AC head.
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Old 05-06-2013, 11:51 AM   #4761
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IIRC his dealer told him he had the AC head.
PET77, is this correct?
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Old 05-06-2013, 02:12 PM   #4762
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I believe the new Pentastar is direct injection which will produce a louder than normal injector tick because of the high pressure at which they run. Similar to a diesel engine running the high pressure injectors. The clanging you here on these videos out there is more like a lifter or valvetrain noise. My JKU has a build date of July 2012 and so far no loud clanging , just injector tick and sometimes smokes on startup. Kinda weird it only has done it like three times in 10 months and seems to be after I start it drive into the garage turn it off and then re-start it within an hour. Not burning any oil and I use Castrol 5W-30 conventional motor oil and filter guard oil filters from O'Reiley's.
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Old 05-06-2013, 02:19 PM   #4763
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Dealer was unable to re create the smoke and I am just concerned about valve seats allowing oil to sit on top of the piston and burn off on start up. JEEP needs to honor these beyond their warranty knowing there is a problem. Love the power of this new motor and 5 speed auto I just want it to hold up to off road driving and spirited on road excursions.
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Old 05-06-2013, 03:45 PM   #4764
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I believe the new Pentastar is direct injection which will produce a louder than normal injector tick because of the high pressure at which they run. Similar to a diesel engine running the high pressure injectors. The clanging you here on these videos out there is more like a lifter or valvetrain noise. My JKU has a build date of July 2012 and so far no loud clanging , just injector tick and sometimes smokes on startup. Kinda weird it only has done it like three times in 10 months and seems to be after I start it drive into the garage turn it off and then re-start it within an hour. Not burning any oil and I use Castrol 5W-30 conventional motor oil and filter guard oil filters from O'Reiley's.

The Pentastar is not direct injection yet, however there are plans for it.
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Old 05-06-2013, 03:51 PM   #4765
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Ok so I went to another dealer cause the first one said it was injector noise and didn't want to replace the head if there was nothing wrong with it. They wanted to wait for the cel light. I said bs it is ticking and it's not injector noise I know what injector noise sounds like. Second dealer did a compression check and said it had low compression in cylinder so they are replacing the head with the latest revision and the have the heads on hand and have been doing at least a few each week. Should have my jeep back tomorrow and will let everyone know what the revision is.
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Old 05-06-2013, 04:20 PM   #4766
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PET77, is this correct?
Here's what he said a while back. HTH

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Ad 2) Not sure about your line "left side heads are not having problem" ? Isnt that the drivers side aka just the one, that is having problem? Or are you just trying to say, that AC design is ok in your opinion?
Btw, its kinda misleading speaking about the number RL141353AC since you see this number only if you order the head separately. If its on the car, all you can see is Julian date and some other part number, which obviously does not change.
Also, as I have written before, I have 2013 model, made September/October 2012 which, according to my dealer already had the new head design and I still got the same failure as the older models. I therefore can not agree to your conclusions that AC design remedies all...

Ad 3) How would they do that? redesign or change in processing?
Ad 4) Would be really happy to hear some more infor about this. One way or another, you are the one that sees the old and new heads, can you tell any difference visually?

Apart from that, one persisting question: What exactly are/represent the 16B, 19A etc. numbers?
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Old 05-06-2013, 04:41 PM   #4767
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Thanks!
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Old 05-06-2013, 04:45 PM   #4768
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^^ No problem!^^
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Old 05-06-2013, 05:05 PM   #4769
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Let us hope this is an isolated issue for the 13s. I would love to be able to run my 3.6 up to 300k like the 4.0s would do. Time and miles will tell.
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Old 05-06-2013, 06:13 PM   #4770
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Let us hope this is an isolated issue for the 13s. I would love to be able to run my 3.6 up to 300k like the 4.0s would do. Time and miles will tell.
Synthetic oil is your best friend.

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