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Topic Review (Newest First)
Yesterday 12:49 AM
Lusus_Naturae The theory that Bob and I had discussed was that the inside channels in the AA were too small, and the coolant flows from the right head to the left head, making the left head receive warmed coolant. The left head's narrow channels can't cool the head fast enough, which leads to the issues, and eventual replacement of the head. This has been proven by either of us, it's simply what we are seeing and determining from what's seen.

So, going by this theory, the defective left head, if not warped or otherwise damaged, could possibly be remanned to remove more of the inside channel and open up the coolant flow. The thing is, we do CNC and milling in my family - this isn't a small task to do and the engine channels are cast throughout I believe - I honestly haven't looked closer at it, maybe next time. If they are cast throughout - the amount of work needed to measure and machine it out would probably be more than scrapping the metal and replacing it with a new designed head.

I pulled these from another post awhile back, I don't have a credit for who took them, sorry, but these show a AA head that was pulled (the dirty one) and a AC head that was replacing it. Link to my Photobucket as I'm out of bandwidth again here.

http://s1318.photobucket.com/user/Lu...?sort=3&page=1

I did have the photos noted, the used one is AA head Julian date 1321A, and the new one is AC RL Head Julian date 0613B. Which brings back the mention above of RL being a remanned head.
Yesterday 12:38 AM
Lusus_Naturae
Quote:
Originally Posted by bbtj View Post
My first question would be, when did the Durango come off the assembly line? Vehicles can sit on the lot for months, before being sold, so the mileage has little to no bearing in the issue.
This I can't answer, but why would a 2012 head show up on a 2014 vehicle after two revisions were already done, AB and AC? Why would or how would a trouble prone AA head get installed? Is someone looking the other way, or telling people to use whatever is on the shelves we have to keep production up. Go go go!
08-26-2014 11:59 AM
Blastek Well, way back when they were replacing heads in 2012, this issue of part re-use came up. I was assured mine was "absolutely not a re-manufactured part" at the time it was replaced.

The heads part numbers that we got as replacements are prefixed with "RL", which means the dealer must send the head back to Chrysler so they can create a re-manufactured head from the core. From those two cases posted above, it seems like they are using the re-manufactured heads in new production vehicles. That assumption relies on the julian date being the <NNN> day of the year followed by the <Y> year.

Unless the trailing number on the julian date does not indicate the year, it kinda looks like they are reusing heads. Need more evidence from 2013 and 2014 owners to see if they have 3 and 4 for 13 and 14...
08-26-2014 07:54 AM
m998dna
Quote:
Originally Posted by bbtj View Post
My first question would be, when did the Durango come off the assembly line? Vehicles can sit on the lot for months, before being sold, so the mileage has little to no bearing in the issue.
Its a 2014.. And it has 2012 heads on it. If my moral compass is pointing north that tells me they stockpiled and are using new old stock or reworked the returned heads.. Either way it's wrong.

At this point I would classify Chrysler Fiat as scum bags.

.
08-26-2014 05:37 AM
gecko4 If you take a look at the other pentastar head thread, a member just got her head changed under warranty. The tech left out some bolts and she took a pic. The julian date is 3041a, so chrysler is definitely using up the old heads. Possibly reworked??
It's possible they stopped selling the old castings until they came up with a fix to put them back in service.
08-26-2014 05:36 AM
bbtj My first question would be, when did the Durango come off the assembly line? Vehicles can sit on the lot for months, before being sold, so the mileage has little to no bearing in the issue.
08-25-2014 10:56 PM
m998dna
Quote:
Originally Posted by Lusus_Naturae View Post
Yes, or you work too many years on graveyard shift and can't sleep like a "normal" person anymore.

So, I talked to my tech at the dealer this afternoon, I'll call him Bob. I told him a bit about this thread and asked if he would take a look at the Julian dates on 'problem vehicles' coming in and take a few notes if he could. He said he would try to help out.

So today he showed me a 2014 Durango with a 3.6 engine. The vehicle had about 7,000 miles on it, and both heads were being replaced under warranty. So he showed me the heads, both were out already, and I took some photos.

Both heads are early manufacturing dates. So the question becomes - are they remanning the heads they are pulled off as defective and sending them out again on new vehicles? Or are they using up a stockpile of defective heads for some reason, like hoping to keep production up and figuring they'll fix them later if they have issues.

In any case here are the photos for the 2014 Durango today. Both from January 14, 2012 - AA heads.
I think you just uncovered a major no no. If these were returned as defective parts and Chrysler reworked, reconditioned or remanufactured them and installed the old heads on new vehicles, I think Chrysler can get in a load of deep do do over this.

Especially since a new 2014 vehicle is having both replaced at 7,000 miles under warranty.

This sounds like a class action waiting to happen.

Damn... This may be jail time worthy - misrepresenting and selling a new vehicle with used or reworked parts?

Any consumer product lawyers in the house?

.
08-25-2014 10:02 PM
Old Dogger ^^^This is not good..........
08-25-2014 09:40 PM
Lusus_Naturae Yes, or you work too many years on graveyard shift and can't sleep like a "normal" person anymore.

So, I talked to my tech at the dealer this afternoon, I'll call him Bob. I told him a bit about this thread and asked if he would take a look at the Julian dates on 'problem vehicles' coming in and take a few notes if he could. He said he would try to help out.

So today he showed me a 2014 Durango with a 3.6 engine. The vehicle had about 7,000 miles on it, and both heads were being replaced under warranty. So he showed me the heads, both were out already, and I took some photos.

Both heads are early manufacturing dates. So the question becomes - are they remanning the heads they are pulled off as defective and sending them out again on new vehicles? Or are they using up a stockpile of defective heads for some reason, like hoping to keep production up and figuring they'll fix them later if they have issues.

In any case here are the photos for the 2014 Durango today. Both from January 14, 2012 - AA heads.
08-25-2014 04:15 AM
m998dna This is what happens when you have insomnia...



.
08-25-2014 04:10 AM
Lusus_Naturae
Quote:
Originally Posted by m998dna View Post
Wow... ancient thread brought to life.

.
BOooooo!
08-25-2014 04:10 AM
Lusus_Naturae Raising this from the dead to add some new info. I was working on my Jeep last week in the driveway, and I live near a dealer, and one of the tech's stopped over to see if everything was ok after work. Nice guy, eh?

So, we start chatting a bit about stuff and he's 'the' guy that does engine work there. So I ask about the head issues, trying to make light talk. He then tells me he's seen an uptick in 2014's with head issues coming in. I have heard of a few, including seeing a few posts on this forum, but I didn't think it was becoming a known issue like the 2012's.

I didn't have the brainpower to process some of what he said at the time, but he was telling me about how it's across the models using the 3.6 engine, not just Wrangler. I showed him the julian date system this post explains, and he said they use that often for parts - but he hadn't heard about using it for the heads before (makes me wonder).

Anyhow, if there are people out there with a 2014 and it's having a head problem, or lifters, etc. would you please add your info to this list?

JK or JKU
head date
left or right side or both
dealer diagnosis and/or fix for the issue
08-25-2014 04:06 AM
m998dna Wow... ancient thread brought to life.

.
08-25-2014 04:00 AM
Lusus_Naturae 255 - the day - Sept 12 /// the following 2 is for 2012. The B means nothing.

Should be an AC head.
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?
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