The passenger side valve cover has an AB at the end of the part number, is the the part number for the head itself or the valve cover? My engine build date is July 26 2012 and mfg date on the jeep is August 2012. Is there anywhere else I can check the part number on the head itself?
look at the driver side valve cover fromm the fender near the brake booster. Right at the bottom of the head just above the exhaust there is a metal stamp. Its behind the steering column. The first line is the build date in julian. 2072 and higher (the trailing 2 is the year) is an AC head.
You've got an AC head. Sorry it was 206 or higher. Here's the original note:
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
all parts end with two letters. Usually AA because most parts don't get revised. The AB sticker that you can see on the passenger side head is the part number for the plastic valve cover. This isn't related to the part number for the cylinder head, which is not visible on the passenger side because the exhaust blocks it.
Well... That's BS that Chrysler had full knowledge of this issue in the 2012 models and used the defective parts in the 2013 models. I'm going to follow up with a letter to them expressing my frustration and dismay over such bad business practices. My Jeep has 3K miles and I am about to do the lift and a bunch of other mods. But until I get this issue addressed or resolved, I'm holding off. It does make noises that don't seem right, banging or ticking or whatever you want to call it... It pisses me off.
How do you know the part is defective? Don't you think Chrysler made sure the heads going into '13's were OK regardless of part number? It's not inconceivable that older rev. heads could have been screened or reworked at the factory to ensure this issue didn't come up.
Would they purposely go into the '13 MY with what could be a huge warranty expense issue when they had a fix in place for better part of a year??
I wish we could get some straight info on this!! Any Chrysler engineers on this forum?
From what I understand based on the previous posts and other threads, the date stamped on the head indicates the design used for the valve seat area etc... That tells me that I have the part that has been riddled with issues on 2012 models...
My build date on door is July 2012, purchased Sept 11.
i cant see my head number...my jeep was built in march 2012...i hope i dont get that problem...and if they had that many problems why no recall.....maybe the government is turning a blind eye since we bailed them out lol
most recalls are for safety, I guess one will have to explode going down the highway killing a few people first. Kind of sucks they do recalls because they need to add a clip to the carpet to keep the floor matt in place or for light bulb that might start a fire but...................:banghead:
jeep should offer to replace all the aa heads with upgraded ones...even if they are out of the warranty period knowing there was a possiblity of manufacture defect. they will most likely say screw the customer though and expect them to buy from them again.....im just saying they ought to do a preventative service to them....i know i would not wanna buy another if they will not ensure they gave me top quality parts... after all its our hard earned money we spend i mean its basically the guts of the whole vechicle we're talking about here lol
can you guys describe the location of the stamp a little better? Great photos, but they are so tightly cropped I have no idea where I should be looking.
It looks like the first batch of 2013's have AB heads. My July build 2013 has a head number of 1962A. I was more curious than concerned and figured I would post my info for others to compare. 2500 miles so far and mine has been nothing short of awesome.
2013 JKU - 09/28/12 born on date - 2642B on left head
@truthiness - for the left side head, stand on the left of the Jeep (driver side) and looking at a long angle from the edge of the fender - look between the metal brake lines and the rear reservoir under the white wire clip. You should be able to see the bottom two lines easily, the top line hides more behind the wire clip.
I haven't hunted down the right side yet.
If I looked at this correct, my engine was built on Sept 21st on the second shift? I hope they did good work, that would be a Friday....
Just checked my 2013..It says 2082B... I guess Im 2 days to the good and have an AC head...Not that it probably makes any difference but its a slight peace of mind...Love The Wrangler !!!!!
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