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Old 09-05-2013, 05:39 PM   #1
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Had a Pentastar head replaced?

So 13600 miles on my 2012 JKU. Mine ticked a bit since new. Never paid it much attention since it ran fine and really wasn't that loud. Even figured it could be normal injector noise. Never any check engine light either. Just figured I would wait until something else went wrong and it required a trip to the dealer for them to look at it. So the front axle seal started leaking and I took it in for a warranty fix and figured I'd mention the ticking valve train while it was in there. I was fully expecting to get the "that sound is normal" line since it wasn't that loud or bad. Surprisingly, I got a call back today that they are replacing the entire head. That's all fine since its under warranty.

Well I think it's fine. My question is, for those who have had this done, did it solve the issue permanently? Or is this a sign that more trouble might be on its way? What about the other head? They are only replacing one side. Any issues with a brand new head on one side and not the other?

Should I trade it in now for a new 2014 while it still has some value? Or should I rest assured that this new head fix will be the end of my trouble?

Thanks.

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Old 09-05-2013, 06:05 PM   #2
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Trade it like I did. Resale value is so high you will get most all of your money back. Not worth the BS of sloppy dealer repairs!

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Old 09-05-2013, 06:07 PM   #3
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Never heard of any issues once the head has been replaced.
New head has a different design, I wouldn't sweat it.
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Old 09-05-2013, 06:20 PM   #4
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Never heard of any issues once the head has been replaced.
New head has a different design, I wouldn't sweat it.
Do you know what is different about the new head design? So now I would have one new design head and one old. Am I on borrowed time until the old one goes bad too? And is my new one likely some remanufactured POS? I use my jeep in remote places and this makes me uneasy.
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Old 09-05-2013, 10:27 PM   #5
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Not sure if it is a new design or just correcting a flaw.
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Old 09-05-2013, 11:24 PM   #6
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Originally Posted by elToro View Post
So 13600 miles on my 2012 JKU. Mine ticked a bit since new. Never paid it much attention since it ran fine and really wasn't that loud. Even figured it could be normal injector noise. Never any check engine light either. Just figured I would wait until something else went wrong and it required a trip to the dealer for them to look at it. So the front axle seal started leaking and I took it in for a warranty fix and figured I'd mention the ticking valve train while it was in there. I was fully expecting to get the "that sound is normal" line since it wasn't that loud or bad. Surprisingly, I got a call back today that they are replacing the entire head. That's all fine since its under warranty.

Well I think it's fine. My question is, for those who have had this done, did it solve the issue permanently? Or is this a sign that more trouble might be on its way? What about the other head? They are only replacing one side. Any issues with a brand new head on one side and not the other?

Should I trade it in now for a new 2014 while it still has some value? Or should I rest assured that this new head fix will be the end of my trouble?

Thanks.
Had my left side head changed out at 14K. I've had no problems since. Just turned 29K and she's still running strong.
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Old 09-13-2013, 06:47 PM   #7
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left head being replaced when they can get the part (national back order due to high demand). 20k on my jk and already a major repair? this bool-chit! if the heads are weak, why are they only replacing one at a time? found this article about them replacing with "more robust heads". again I ask... why only one at a time? Dealers repairing Chrysler V6 engines - Autoweek
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Old 09-19-2013, 10:37 AM   #8
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still waiting for a call back from "Chrysler Cares"... should change their name to Chrysler Don't Really Give A Damn. found this, and it indicates that the new heads have hardened valve guides and seats, along with part numbers for the new heads. Pentastar Engines: Repairs and Maintenance my concern is that, since the left and right heads are virtually the same, I want both heads replaced. would also like my warranty to start over since I no longer have a factory fresh motor. my thinking is if they're confident in the fix and their mechanics, they ougtta back it up with the warranty. thoughts?
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Old 09-19-2013, 06:16 PM   #9
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still waiting for a call back from "Chrysler Cares"... should change their name to Chrysler Don't Really Give A Damn. found this, and it indicates that the new heads have hardened valve guides and seats, along with part numbers for the new heads. Pentastar Engines: Repairs and Maintenance my concern is that, since the left and right heads are virtually the same, I want both heads replaced. would also like my warranty to start over since I no longer have a factory fresh motor. my thinking is if they're confident in the fix and their mechanics, they ougtta back it up with the warranty. thoughts?
Chrysler doesn't care! They told me there was no issue with 2012 heads. Such B/S! I traded 2 2012's in so as not to deal with dealer B/S! Good news is that resale value is very high, despite head issue!
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Old 09-19-2013, 10:02 PM   #10
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Glad you brought this up. Don't think it's been discussed here on the forum before.
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Old 09-19-2013, 10:13 PM   #11
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What's a Pentastar?
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Old 09-19-2013, 10:50 PM   #12
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Old 09-19-2013, 11:57 PM   #13
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Some info on the differences with the heads - http://www.wranglerforum.com/f33/doe...ad-198794.html

There are plenty of threads as well addressing this issue, take some time and read them. Most of the issues were with the left head, a few had the right side replaced too but I honestly can't remember if that was a dealer precaution or there was an issue.

I would get the head fixed and then decide what to do, I wouldn't worry about keeping it, but I wouldn't feel bad about a trade in either - although I am curious what the plan is in 2016... that may force me to wait a bit longer before trading.
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Old 09-20-2013, 12:11 AM   #14
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glad you brought this up. Don't think it's been discussed here on the forum before.


ahahahaha!
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Old 09-20-2013, 12:17 PM   #15
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From Chrysler's letter: "Chrysler routinely analyses failed parts to develop product improvements in response to data received from dealers and the warranty system. No evidence currently exists to suggest a quality problem with the cylinder head components on the 2012 Wrangler model vehicles." Judge this for yourselves!
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Old 09-20-2013, 11:11 PM   #16
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Check Engine Light

Got a check engine light last week, decided to hook up my code reader. PO 302 said something about a misfire, and probably just an electrical wire. I just about crapped when the dealer called and said they have to replace a head. Glad its under warranty, but really wondering if there is more to come.
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Old 09-20-2013, 11:22 PM   #17
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Old 09-21-2013, 11:18 PM   #18
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Pentastar Engines: Repairs and Maintenance
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From Chrysler's letter: "Chrysler routinely analyses failed parts to develop product improvements in response to data received from dealers and the warranty system. No evidence currently exists to suggest a quality problem with the cylinder head components on the 2012 Wrangler model vehicles." Judge this for yourselves!
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Old 09-21-2013, 11:19 PM   #19
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Old 09-21-2013, 11:20 PM   #20
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from pentastars.com
Cylinder head failures (to mid-2012)

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 (which include “bad gas”) and an effective cure. A fix (hardened valve guides and seats) 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.
Most vehicles with this problem appear to be Jeep Wranglers, and a service bulletin was issued for Wranglers built before January 24, 2012 (MDH 0124XX) seems to be designed to prevent “false positive” check-engine lights.
Any model year 2013 and newer car or Jeep or truck should have the new heads. A “Julian” build date of 2062 (the 206th day of 2012) stamped on the cylinder head shows that it is one of the newer types. The part numbers of the new heads are RL141353AC or higher (left side) and RL141352AD (right side).
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Old 09-22-2013, 09:04 AM   #21
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The dealer shop sent my Jeep home to wait for the new head. Told him I had a 400 mile trip coming up. He said "no problem, go for it". Ok, thanks for leaving that message on my voice mail. May need it later.

Funny thing, the next day the CEL went away.
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Old 09-22-2013, 05:11 PM   #22
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Told him I had a 400 mile trip coming up. He said "no problem, go for it".
First 200 mile leg done. No CEL, no tick, no problem. What's up with that?
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Old 09-22-2013, 08:04 PM   #23
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Glad you brought this up. Don't think it's been discussed here on the forum before.
oh I'd say it's been discussed ALOT on here. Here's more than 5K posts in one thread:

http://www.wranglerforum.com/f33/upd...ad-137608.html
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Old 09-22-2013, 08:26 PM   #24
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RL stand for RELABEL = Brand New

Left side head 7.30.2012 # RL141353AC

This is the part# on my (RL141353AC) invoice
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Old 09-22-2013, 08:36 PM   #25
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still waiting for a call back from "Chrysler Cares"... should change their name to Chrysler Don't Really Give A Damn. found this, and it indicates that the new heads have hardened valve guides and seats, along with part numbers for the new heads. Pentastar Engines: Repairs and Maintenance my concern is that, since the left and right heads are virtually the same, I want both heads replaced. would also like my warranty to start over since I no longer have a factory fresh motor. my thinking is if they're confident in the fix and their mechanics, they ougtta back it up with the warranty. thoughts?
I read the link and found this interesting. QUOTE from the link: The part numbers of the new heads are RL141353AC or higher (left side) and RL141352AD (right side).

Note the word new HEADS, if my reading skills are on par that means they did something to the left and right heads. But there are really no complaints about the right heads failing are there? I guess maybe a precautionary measure? At least they are addressing the problem. I think I'd try and get both heads done too, but I don't think they'll do it.
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Old 09-22-2013, 08:43 PM   #26
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if the heads are weak, why are they only replacing one at a time? found this article about them replacing with "more robust heads". again I ask... why only one at a time?

With first year engines, there are always issues getting things perfect.

Think about it, when things need to match up down to the fraction of a millimeter in these new engines, things need to be perfect and there is more room for error. Tolerances get tighter as the manufacturing process is improved over time, as the robots and machinery are adjusted, and as they learn to avoid problems and do things more efficiently.

IMO - first year engines and vehicles are always a crap shoot because of this process. Your new parts are going to be much more refined and better than your initial heads.
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Old 09-23-2013, 12:22 PM   #27
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I read the link and found this interesting. QUOTE from the link: The part numbers of the new heads are RL141353AC or higher (left side) and RL141352AD (right side).

Note the word new HEADS, if my reading skills are on par that means they did something to the left and right heads. But there are really no complaints about the right heads failing are there? I guess maybe a precautionary measure? At least they are addressing the problem. I think I'd try and get both heads done too, but I don't think they'll do it.
I remember a few people had the right side replaced. Most issues are just in the left side, the head or lifters, or both.


Case Number: S1209000022
Release Date: 10/16/2012
Symptom/Vehicle Issue: Identifying Service Replacement Cylinder Heads
Diagnosis:
3.6L cylinders have been improved for durability by upgrading the valve seat and valve guide material. In order to verify that the latest upgrade is incorporated in to the cylinder head received from service parts verify the part number and Julian build date of the cylinder head
Part Number- RL141353AC or higher - left side head
Part Number -RL141352AD or higher– right side head
And a Julian build date of 2062 (206th of 2012) or higher .The build date is stamped on the outboard side of head at the center just below the rocker cover sealing rail

If you look at the photo, the top line is 2172G - which means the 217th day of 2012 = 217(2)G

If it is 0043G it would be the 4th day of 2013.

You can see the left side stamp on the head if you look under all the hoses at an angle, I think I did have to hold one hose aside a little to get a better view of mine.

Credit to davefr and Blastek for some of the info I used.
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Old 09-23-2013, 12:56 PM   #28
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With first year engines, there are always issues getting things perfect.

Think about it, when things need to match up down to the fraction of a millimeter in these new engines, things need to be perfect and there is more room for error. Tolerances get tighter as the manufacturing process is improved over time, as the robots and machinery are adjusted, and as they learn to avoid problems and do things more efficiently.

IMO - first year engines and vehicles are always a crap shoot because of this process. Your new parts are going to be much more refined and better than your initial heads.
Except the engine has been in use for a while before it started getting plopped into the Wranglers...
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Old 09-30-2013, 10:14 AM   #29
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yup. 2012 was not the first year of the pentastar, just the first year of the pentastar in jk's. on a personal note, chrysler has agreed to replace BOTH my heads, and they're giving me a generous gift to make up for the way this was handled at first.

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