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Thread: Does my 2013 JK have an AB or AC head? Reply to Thread
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Topic Review (Newest First)
11-09-2013 06:59 PM
AGNP2013 Oh, finally I found my #.

2013 JKUS. Bought it in Dec 2012.

Built date: Sept 12 (does it mean Sept 12th or Sept 2012?)
2552B

Looks like I have an AC head.
11-09-2013 02:43 AM
AGNP2013 Can anyone upload a video in YouTube how to check the part number of the head and let me know?
11-09-2013 12:44 AM
Lusus_Naturae I'd lean towards AA, just because the rumor has been the AB lasted about 6 weeks before the AC started, which would place the AB head starting about June 13 or so. There's no way to tell for sure at this point though.
11-08-2013 09:29 AM
monte417
Quote:
Originally Posted by Lusus_Naturae View Post
Driver's side frame of the door, by the latch if I remember correct.
Thanks! cant believe I didnt see that I was looking on the body not the door itself. Looks like it was born march 2 with an engine build of 0762B which is march 16th. does anyone know if I have an AA or AB head?
11-07-2013 11:36 PM
Lusus_Naturae
Quote:
Originally Posted by monte417 View Post
Thanks the only thing I found on my door are laser inprinetd numbers reading 082 1 448. There are no letters MDH or no white label. Not sure what to make of these numbers maybe build date is august 2nd at 448? what does the 1 mean? My engine build said 0762B which I believe is in march so can that build date be right?
Driver's side frame of the door, by the latch if I remember correct.
11-07-2013 11:32 PM
Lusus_Naturae
Quote:
Originally Posted by gecko4 View Post
2013 model, built July 27 2012.
Passenger head 2012B
Drivers side 2022A
Looks like I've got problem prone heads. Missed the redesign by about 5 days. What's with the A and B? Does that just designate left and right side?
Not sure on the A and B, I haven't read up on it in awhile.

The close date though would say you are more likely to have an AB head, which is said to be less likely to have issues.
11-07-2013 09:20 AM
monte417
Quote:
Originally Posted by gecko4 View Post
It's on the drivers door beside MDH which is month day hour.
Thanks the only thing I found on my door are laser inprinetd numbers reading 082 1 448. There are no letters MDH or no white label. Not sure what to make of these numbers maybe build date is august 2nd at 448? what does the 1 mean? My engine build said 0762B which I believe is in march so can that build date be right?
11-06-2013 07:43 PM
gecko4
Quote:
Originally Posted by monte417 View Post
I guess im screwed 0762B is the build date of my head. Not sure if its AA or AB but definately not an AC according to this thread. How do you guys find out your build date. I checked around on the door I didnt see anything
It's on the drivers door beside MDH which is month day hour.
11-06-2013 10:51 AM
monte417 I guess im screwed 0762B is the build date of my head. Not sure if its AA or AB but definately not an AC according to this thread. How do you guys find out your build date. I checked around on the door I didnt see anything
09-23-2013 12:51 PM
back in the game So I am assuming all of the COD MW3s will have this issue!
08-28-2013 10:49 PM
gecko4 2013 model, built July 27 2012.
Passenger head 2012B
Drivers side 2022A
Looks like I've got problem prone heads. Missed the redesign by about 5 days. What's with the A and B? Does that just designate left and right side?
08-01-2013 08:15 AM
TrueBlueJK
Quote:
Originally Posted by Night Marcher View Post
My 201310A was built last month so I'm assuming all is good.
Well I wouldn't say the 13's are completely out of the woods, someone pm'd me saying they're buddy just bought a brand new 10A and it needs a new head with just 150 miles on it. I'm not sure if that's just a coincidence or not but shit I hope the 13's don't start popping up with these issues as well.
08-01-2013 12:02 AM
Night Marcher My 201310A was built last month so I'm assuming all is good.
07-31-2013 10:40 PM
gaylon Danke
07-31-2013 08:32 PM
m998dna 1503 ...

According to the posts above and this calendar... May 30, 2013, which indicates AC head.

http://www.fs.fed.us/fire/partners/f...n-calendar.pdf

.
07-31-2013 07:15 PM
gaylon 1503a14520014000 - this is my buddy's head number. What head is this?
07-27-2013 02:13 PM
EricM
Quote:
Originally Posted by Xena1 View Post
Thanks, but I am not sure if anyone knows when the first design change was. Stopped in the Jeep dealer this AM and spoke to the owner, whom I know. He said they haven't had any warrantied 2012's with the head problem. Also said that if it happens, I will be covered through 100,000 miles. So why worry!
I seem to recall from one of the other threads that the switch to the AB head occurred around mid June of 2012 and had a very short run (about 6 weeks). Someone on here reported that there were issues with cam bearing journals on the AB head that caused it to have a short run before the AC head started on day 206 of 2012.
07-27-2013 12:41 PM
Lusus_Naturae A lot of dealer will tell you they don't have any problems. My dealer started telling me this too, and then he just stopped mid-sentence because he realized I already knew - they had one 3 stalls away with the head being replaced and I just walked through the shop. He meant well, in that they don't want customers to worry, but it comes down from the big boss that you don't talk about it too.
07-27-2013 11:37 AM
Xena1
Quote:
Originally Posted by EricM View Post
You have the original AA design head. It was assembled on the 345th day of 2011.
Thanks, but I am not sure if anyone knows when the first design change was. Stopped in the Jeep dealer this AM and spoke to the owner, whom I know. He said they haven't had any warrantied 2012's with the head problem. Also said that if it happens, I will be covered through 100,000 miles. So why worry!
07-27-2013 11:36 AM
scuba_steve I finally just checked my 2013 JKR (built August 2013) - 2152B

That means August 2, 2012...beating 2062 (July 24, 2012) by just a little more than a week. I hope those dates are correct.

Thanks for the info.
07-27-2013 10:58 AM
EricM
Quote:
Originally Posted by Xena1 View Post
Just checked my driver side head. Numbers are:3451A then 02980 then 001000. Can someone interpret? Build date 12/16/11. Thanks
You have the original AA design head. It was assembled on the 345th day of 2011.
07-27-2013 10:44 AM
Xena1 Just checked my driver side head. Numbers are:3451A then 02980 then 001000. Can someone interpret? Build date 12/16/11. Thanks
07-26-2013 06:47 PM
jkbarnett Just checked my 2012
Build date June 12

1572A missed 206 by 34 days

11k ok so far....
07-26-2013 06:01 PM
Xena1 Thanks for the info! I emailed Chrysler customer service who responded with this cleverly worded statement that there is no evidence of a defective head or head components on the 2012 Wranglers. Hey s***t can happen, but I was hoping Chrysler would own up to the problem and fix it. My 2012 has 15K miles and without problems, but would like to know when at 50K miles what will happen.
07-25-2013 01:08 AM
LameStory I'm getting a bit worried myself. I haven't looked at the head itself but my Jeep has a build date of Feb. 14th, 2012 so I'm definitely at risk. I'm at almost 9000 miles so far. Sucks because I want to put a supercharger on it next year but I'm sure they'll use that to get out of covering my head under warranty if it blows - even if it is a known problem.
07-25-2013 12:43 AM
Lusus_Naturae
Quote:
Originally Posted by Xena1 View Post
The question I would like to know is; When did Chrysler change the A head to the B heads? My 2012 was made on 12/16/11. Does it mean I have the defective head?
You are at risk - your build date is early to begin with and I don't think anyone has confirmed when the AB heads began. Use the photos is the prior pages to ID your head's build date.

How many miles does it have now? There is a wide range of when the head problems are showing up, and a variety of symptoms as well. If you are in warranty they will replace it under warranty - once diagnosed, which can be a battle in itself.

Here's a few to start -

http://www.wranglerforum.com/f33/201...-a-143071.html

http://www.wranglerforum.com/f33/upd...ad-137608.html

http://www.wranglerforum.com/f33/eff...re-255473.html

http://www.wranglerforum.com/f33/dis...ak-251705.html

http://www.wranglerforum.com/f33/p0302-249709.html

http://www.wranglerforum.com/f33/has...ne-190348.html
07-23-2013 06:24 PM
Xena1 The question I would like to know is; When did Chrysler change the A head to the B heads? My 2012 was made on 12/16/11. Does it mean I have the defective head?
07-23-2013 05:33 AM
JBADV Thanks.
07-22-2013 03:31 AM
Lusus_Naturae
Quote:
Originally Posted by JBADV View Post
Another one : Jan 13 on the door tag

Left head : 0043A
10620
013000

Right head : 0043B
09390
014000

Thanks for the help , JB
Head date Jan 4, 2013
07-22-2013 03:27 AM
Lusus_Naturae
Quote:
Originally Posted by truthiness View Post
That is July 25th, 2012 in case anyone wants to know the specific date.
It's a bit interesting that this date is also the usual date for change of year after they close the factory for retooling. Makes sense too, in that if there was a bad tool or blade that wasn't set just perfect, they would have caught it during this downtime and fixed or replaced it, therefore fixing the issue. Just a thought.
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