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Old 10-23-2012, 08:31 AM   #3001
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^So folks who use different fuel mixes and drive a certain way won't have the ticking head. LOL

I know......bad joke.

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Old 10-23-2012, 08:38 AM   #3002
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^So folks who use different fuel mixes and drive a certain way won't have the ticking head. LOL

I know......bad joke.

The thing that came to mind when I read that was I hope they dont have the nerve to be insinuating that if you wheel your Jeep you can develope this problem.

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Old 10-23-2012, 08:46 AM   #3003
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What frustrates me is Bob Lee's vague "corporate speak" just creates more questions.
What fuel mix? What type of driving cycle? Etc. Some owners experience this issue within a few thousand miles, a few have 15K or more and no problem. What is the common denominator? If it happens to me it happens. I would just like to know the root cause.
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Old 10-23-2012, 08:54 AM   #3004
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Originally Posted by SilverSport View Post
What frustrates me is Bob Lee's vague "corporate speak" just creates more questions.
What fuel mix? What type of driving cycle? Etc. Some owners experience this issue within a few thousand miles, a few have 15K or more and no problem. What is the common denominator? If it happens to me it happens. I would just like to know the root cause.
^This...

I just want to know what is wrong...and what I can do to prevent it.

It is the guessing game that pisses me off because "gas and driving habits" make too easy for Chrysler to weasel out of a work once my warranty is up.

I'm not interested in buying another warranty to cover Chrysler's ass.
That would be BS.
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Old 10-23-2012, 08:58 AM   #3005
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Yeah, I mean if its too high octane or too low octane it would be nice to know. My first impression would be to put high octane to avoid problems but what if thats the problem. Maybe the high octane runs to hot and we should be using low octane? Would be nice to know.
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Old 10-23-2012, 09:01 AM   #3006
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I find this interesting.

Chrysler currently builds the Pentastar V-6 at its Trenton Engine Plant in Trenton, Michigan and Saltillo South Engine Plant in Coahuila, Mexico; it also will begin building them at its Mack Engine Complex in Detroit, Michigan later this year.
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Old 10-23-2012, 09:10 AM   #3007
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Originally Posted by stans1stjeep

I called my dealer today regarding this issue.
The service adviser referred me to:

Tech Tip: TT 900-2479.

I will paraphrase the discussion:
If fault code T0302 is present, do a compression check.

If low compression is found call the Tech Hot Line for further instructions, provide the following information, from the customer, to the hot line:
driving cycle (city, highway, etc)
type of fuel used
mileage
and some more.

I didn't ask what happens if low compression is not found, likely the fault code will be cancelled and the Jeep returned to the owner.

The Tech Hot line can authorize a head replacement. The heads will be returned to Chrysler for further analysis.

A Tech Tip is a notice sent to dealers to help them diagnose & repair problems. These are often stand alone documents, with no further follow up. They are some times used, as it sounds in this case, to collect field data for possible future Service Bulletins. depending on the results of the data collection & analysis, a follow up bulletin may, or may not be issued.
I'll refer to this post again. If you want to know if your Jeep is in the suspect list, ask your dealer service advisor if TT 400-2479 applies to your Jeep, by VIN. If you get fault code T0302 and you have low compression Chrysler will get a call from your dealer, asking for a head replacement authorization.
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Old 10-23-2012, 09:11 AM   #3008
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Quote:
Originally Posted by SilverSport View Post
What frustrates me is Bob Lee's vague "corporate speak" just creates more questions.
What fuel mix? What type of driving cycle? Etc. Some owners experience this issue within a few thousand miles, a few have 15K or more and no problem. What is the common denominator? If it happens to me it happens. I would just like to know the root cause.
It is probably to large and thats why they wont release the information. I'm sure they have identified a certain run of engines that came off the assembly line that are affected. Maybe a certain plant, and the run was so large that if they released the stretch of vin numbers to many people would flock to the dealers for the fix. People that may not even have the problem. So it's in their best interest to let these problems develope and handle them as they come. They would be opening up a messy can of worms if they said "every vehicle between this number and that number have to have this fix"

The initial numbers listed where 1700 cases with 500 new cases each week and that Chrysler had 3000 heads made and waiting while still making more. So they pretty much know what to expect.
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Old 10-23-2012, 09:14 AM   #3009
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Quote:
Originally Posted by Lucy Brown
I find this interesting.

Chrysler currently builds the Pentastar V-6 at its Trenton Engine Plant in Trenton, Michigan and Saltillo South Engine Plant in Coahuila, Mexico; it also will begin building them at its Mack Engine Complex in Detroit, Michigan later this year.
That's a good thing. It demonstrates both the popularity of the Pentastar V-6 and Chrysler's commitment to it.
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Old 10-23-2012, 09:25 AM   #3010
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I wish Chrysler would just issue a TSB and come clean about the issue. If detonation is causing the valve/sleeve damage in #2 and #6 cylinders, they should recommend people fill with mid-octane rating(89) to reduce the unwanted detonation. I realize it is a crappy thing to do, since we all bought the Jeep assuming it could run on regular gas. However, if this will prevent damage and ensure the longevity of the engine, I am all for it.

At 5k miles, I don't have noticeable engine noise on my '12 JKU. I plan to keep the Jeep for a very long time. I just want to know what the issue truly is and how to prevent damage in the future.
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Old 10-23-2012, 09:49 AM   #3011
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Originally Posted by aypanthony
I wish Chrysler would just issue a TSB and come clean about the issue. If detonation is causing the valve/sleeve damage in #2 and #6 cylinders, they should recommend people fill with mid-octane rating(89) to reduce the unwanted detonation. I realize it is a crappy thing to do, since we all bought the Jeep assuming it could run on regular gas. However, if this will prevent damage and ensure the longevity of the engine, I am all for it.

At 5k miles, I don't have noticeable engine noise on my '12 JKU. I plan to keep the Jeep for a very long time. I just want to know what the issue truly is and how to prevent damage in the future.
Refer to TT 400-2479. This is a Tech Tip on the issue. Identified by VIN the suspect population.
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Old 10-23-2012, 09:54 AM   #3012
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Refer to TT 400-2479. This is a Tech Tip on the issue. Identified by VIN the suspect population.
How can I get a look at this? I tried Googling it but that did not work so well.
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Old 10-23-2012, 10:08 AM   #3013
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Originally Posted by bbermann

How can I get a look at this? I tried Googling it but that did not work so well.
Call or visit your dealer service dept. With the last 8#s of your VIN, the service advisor can see if your Wrangler is in the suspect population. I have a Wrangler with a build date of 8/11, early 2012 build & in the suspect group.
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Old 10-23-2012, 11:09 AM   #3014
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Call or visit your dealer service dept. With the last 8#s of your VIN, the service advisor can see if your Wrangler is in the suspect population. I have a Wrangler with a build date of 8/11, early 2012 build & in the suspect group.
Any chance you can post the TT here? I am curious if those that actually had the head issue, fall within the date period listed.
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Old 10-23-2012, 11:10 AM   #3015
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Mine goes in tomorrow for engine ticking. Hopefully my dealer isn't made up of douches. We shall see....

2012 sahara 8/11 build 7500 miles NO CEL
Wow I'm loving my dealer. I dropped my wrangler off last night. Got a call this morning telling me the driver side cyclinder head needed replacing. No muss no fuss. I just hope she runs like a top for the rest of her life now.
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Old 10-23-2012, 11:13 AM   #3016
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Forgot the best part. They have one in stock so my jeep will be ready tomorrow. Fast turn around for a good amount of work.
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Old 10-23-2012, 11:18 AM   #3017
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Wow I'm loving my dealer. I dropped my wrangler off last night. Got a call this morning telling me the driver side cyclinder head needed replacing. No muss no fuss. I just hope she runs like a top for the rest of her life now.
I dont see why a dealer would give you a hard time. They get paid to do it. I realize it's not the same amount as if it was a head job off the street without warranty but I cant believe these dealers would be so busy that they would poo poo warranty work. The only thing that would worry me is that since warranty work pays less they wouldnt put an A tech on the job and you have to be at the mercy of a lesser tech making less money.
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Old 10-23-2012, 11:24 AM   #3018
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I dont see why a dealer would give you a hard time. They get paid to do it. I realize it's not the same amount as if it was a head job off the street without warranty but I cant believe these dealers would be so busy that they would poo poo warranty work. The only thing that would worry me is that since warranty work pays less they wouldnt put an A tech on the job and you have to be at the mercy of a lesser tech making less money.
you have to be trained and certified for the head replacements. a lot of dealers only have 1 tech that can actually do it because the training is not as easy to get. this is one contributing factor for delays on head replacement.
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Old 10-23-2012, 11:38 AM   #3019
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Detonation will not cause a valve guide failure. No way, no how.

Pistons, yes, but it has to be some very extreme detonation.
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Old 10-23-2012, 11:41 AM   #3020
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Forgot the best part. They have one in stock so my jeep will be ready tomorrow. Fast turn around for a good amount of work.
Glad to hear you had an easy experience!! Makes me confident Chrysler is now streamlining the process and taking care of it right away! I actually spoke to the head tech at the dealer I'm taking my Jeep to on Friday, he says they haven't replaced any heads on a wrangler yet.. So I'm hoping they don't put me through the loops.. Seems others who are going to dealers who have seen it before are getting all the BS cut out. Lets us know the results!
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Old 10-23-2012, 12:05 PM   #3021
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tech i rode with today that replaced my head 1.5 months ago said he hadn't done any since.
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Old 10-23-2012, 12:09 PM   #3022
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Originally Posted by aypanthony

Any chance you can post the TT here? I am curious if those that actually had the head issue, fall within the date period listed.
No I can't it's in the dealer service system. You have to give the service tech you vin to find out if you jeep is involved.
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Old 10-23-2012, 12:19 PM   #3023
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When I take mine in tonight,is there anything I should say or not say.like should I play it like I don't know any of this stuff on the forum or should I just come out and ask if I'm in the suspected public ? any advice will help
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Old 10-23-2012, 12:29 PM   #3024
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When I take mine in tonight,is there anything I should say or not say.like should I play it like I don't know any of this stuff on the forum or should I just come out and ask if I'm in the suspected public ? any advice will help
Nope. They know it's a problem and you know it's a problem. Do you have any symptoms? if not, then you shouldn't really be worried about it right now.
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Old 10-23-2012, 12:32 PM   #3025
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Definitions about my head replacement:
When I said ticking, it was first noticed when I was next to the garage wall, this was at <5,000 miles. Upon further inspection, it was clear that it was coming from one place, cylinder #2. There was no ticking from the other side of the engine, and that still remains true today. It set a misfire code at a little over 12,000 miles and it went in for head replacement at 14,000 miles. 4,000 miles later the ticking has recurred, ticking on cylinder #2, no code yet, but I fear its coming. If if happens again, I'm done.

When I said the one of the exhaust valves on #2 cylinder was burned, I meant that both the valve and seat had been burned away leaving a carbon trail up into the head where it was leaking. The section was about 3/8" wide, not real deep, maybe 1/16" max. but you could see where it was compromised. Odd that it ran smooth, never skipped or pinged or stalled.
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Old 10-23-2012, 12:34 PM   #3026
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When I take mine in tonight,is there anything I should say or not say.like should I play it like I don't know any of this stuff on the forum or should I just come out and ask if I'm in the suspected public ? any advice will help
Being an educated consumer is the best approach and sometimes can be a Dealers (or any buisness for that matter) worst nightmare. If you let them know that you have done your're research there is less chance the will BS you.
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Old 10-23-2012, 12:37 PM   #3027
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Definitions about my head replacement:
When I said ticking, it was first noticed when I was next to the garage wall, this was at <5,000 miles. Upon further inspection, it was clear that it was coming from one place, cylinder #2. There was no ticking from the other side of the engine, and that still remains true today. It set a misfire code at a little over 12,000 miles and it went in for head replacement at 14,000 miles. 4,000 miles later the ticking has recurred, ticking on cylinder #2, no code yet, but I fear its coming. If if happens again, I'm done.

When I said the one of the exhaust valves on #2 cylinder was burned, I meant that both the valve and seat had been burned away leaving a carbon trail up into the head where it was leaking. The section was about 3/8" wide, not real deep, maybe 1/16" max. but you could see where it was compromised. Odd that it ran smooth, never skipped or pinged or stalled.
When was your's done? I'd like to know if you can get the part# off the 2nd bad head. It may be the 1st redesign they used. Hopefully the 2nd redesign will be the fix. If its the 2nd redesign that went bad again there are some serious questions that need to be answered by Chrysler.
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Old 10-23-2012, 12:38 PM   #3028
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Thanks...I do have a loud ticking,but thought nothing of it til reading this Forum on the weekend.will post when I get some more info from dealer. 11 500 Km built Feb 12/12
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Old 10-23-2012, 01:20 PM   #3029
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Does anyone who HAS had there head replaced know if the dealer they went to for repairs had done one in a wrangler, previously to doing yours? I'm hoping that I have a quick resolution in regards to head replacement! Preparing myself for... " sounds normal to me" reading these forums really does make more educated and prepared for any JEEP situation. Also what is the full AC part #? The third revision? Wanna make sure if it goes down I'm getting the correct part!
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Old 10-23-2012, 01:49 PM   #3030
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My 2012 rubicon got the check engine light this weekend at 12,700 miles. my OBD scanner was showing it throwing code P0306 (cylinder 6 misfire).

Called the local dealer, told her my code and that it ticks like a diesel (pretty much always has) and she immediately said it needed a head replacement and to bring it in. Dropped it off this morning and they gave me a rental for the time being. They had 6 of the "newly designed" heads in stock and 3 techs certified on this repair....Should have the Jeep back in a couple days.

I thought I'd tick along but never actually have this problem, but to be honest I'm sort of glad it's being resolved, especially since I've heard horror stories of dealers giving the runaround and mine went straight to the problem. I feel like since that press release they're more apt to fix the head on the front end.

For reference: I use regular gas (rarely premium) and drive easy to save the tires.

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