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2014 V6 - Cylinder Head Failure

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2014
25K views 25 replies 16 participants last post by  MacDaddy 
#1 ·
Hello everyone,

I was on my way to work today on the highway. I had the cruise control set at ~70mph and all the sudden my engine started hesitating and the check engine light started flashing. I know that a flashing CEL is bad so I immediately pulled off to the shoulder. When I came to a stop, the CEL turned off but the Jeep was shuddering and idling very rough. I turned the engine off and tried to figure out what to do next.

I was figuring flashing CEL = Jeep was going to have to be towed. Traffic was whizzing by me at 70+ mph and I was very close to my exit, so I decided to attempt to get off the highway to a safer location. When I started the Jeep back up, the idle was back to normal and there was no shuddering. The CEL came on but, this time, it was solid instead of flashing. I started driving again and the Jeep seemed to be running normal except for a very slight hesitation, but nothing compared to the original hesitation.

I ended up making it all the way to work with no issues. I called the Jeep dealer that's local to my office and asked if I could bring it in but they told me they were too busy and couldn't take any appointments until next week. :rolleyes: So, after work, I carefully drove the Jeep back toward home and took it my local dealer since they don't require appointments for service. Again, the Jeep seemed to be running normal - just a very slight hesitation in comparison to earlier.

The dealer diagnosed the CEL and told me I need a new cylinder head. They ordered the part and said it will hopefully be in next week. They released the Jeep back to me and said it's OK to drive until the part comes in. They just said I might notice some hesitation though.

I did some searching and saw quite a few posts about this issue for 2011-2013 WK2s but I didn't really see anything for 2014+ WK2s. I was just curious if anyone else has experienced this issue with their 2014+ WK2? I'm a little surprised that a vehicle with only ~10,500 miles needs a new cylinder head. Also, is it really OK to drive the Jeep until the part comes in?
 
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#4 ·
I wonder you had a misfire code and the tech simply jumped to the conclusion that it was the head because that was a common symptom with the earlier head failures. Lots of other things can cause a misfire ( bad coil, bad plug, loose wire, sticky injector, etc.) Your rough running condition improved after a restart so I'm guessing you probably had something that caused a temporary misfire condition. If you were really having the head problem, you likely would have been hearing a valve tick at idle for a while before you got the check engine light. You definitely would have noticed the tick.


Sent from my iPad using JeepGarage
 
#5 · (Edited)
What code are you getting ? Was the tank getting low ? Sure sounds like a termorarily clogged injector or something similar.

A misfire (P030x) will set anytime one (or more) cyls slows the engine which is why the exact code (one cyl vs many and which) is important.

ps with a $10 dongle (OBD-II) and a $5 app (Torque Pro) any Android device with BlueTooth can read codes and a lot more (plug). I check mine about monthly and e-mail the results to myself.
 
#6 ·
I'm with airgas, I too believe the left cylinder head issue was resolved with the 2013s. I have a 2013 with an October 2012 build date and am supposed to be OK. get yourself a code reader with the ability to clear the codes as well, I got one from harbor freight for $80 bucks on sale, used it once to clear a code for the emissions system, which I believe was caused by my using the pressure washer under the hood, 3000 mi. later, CEL never came back on, no trip to the dealer, so it paid for itself already!
 
#8 ·
Hello everyone,

Sorry it took me so long to update this thread. Thank you all for your input. I'm not very mechanically savvy but I'm thinking I should invest in a code reader for going forward. When I initially brought the Jeep to the dealer on 12/5, they got code P0300. According to the paperwork, they found a misfire on cylinder #2. They performed the leak down test and found 60% leakage which is how they determined that the cylinder head needed to be replaced. I have the Jeep back now after having the left cylinder head replaced and so far, so good. It seems to be running a lot better than before but that could be because I've been driving a Hyundai Santa Fe loaner for the past two days. I was so happy to get back behind the wheel of the Jeep! I'll be sure to keep you posted if any other issues come up from this.
 
#10 ·
Bumping this thread to ask a question. If either of you guys are still around, did you have an engine tick before the head was replaced? My '14 V6 has a very loud tick that seems to be coming from the passenger side head area. I'll be taking it in soon to be looked at under warranty. Hopefully it's just a bad injector or something, but it makes the Jeep sound like a hooptie.
 
#13 ·
You can add me to the list of '14s with cylinder head issue. Under hard acceleration pushing it up to near red line like when climbing grade to pass or on flat road. I have been getting the flashing MIL and sometimes a shaking. Usually smoothed out within a mile. Well they did the leak-down test and need to get passenger side head. I am a June 2014 build, so it looks like they haven't resolved this yet.

They are ordering the part today..
 
#15 ·
Welp, finally got a CEL last week and it was P0305 for 'cyl 5 misfire'. Other than the loud ticking (RPM dependent), I was getting some hesitation when taking off and odd vibrations at idle. Jeep drove perfectly fine, but would just shake when idling.

Took it into Koons Jeep on Friday where they replaced the rockers and lifters on the #5 cylinder. Seems to run fine now, no more ticking or vibrations. Would have been nice to have a loaner while they kept the Jeep for the weekend and didn't work on it until Monday. I figured a big dealership like Koons would have loaners available for warranty work, silly me. :rolleyes:

So yeah, guess it's good I didn't have to have the whole head replaced, but is this just a precursor to head damage?
 
#16 ·
Just had mine replaced. Performed Leak Down Test. #6 32% Leak. We shall see where we go from here. Hope this is the last major repair, although I think the transmission will be next. It cannot be good for the transmission to continually starting from second even when towing a 23' trailer.
 
#18 ·
Well its Back.. Driving up to Vermont for the holiday, got the flashing CEL twice on way up, and once on way back which triggered the CEL light to stay on. Dropped by the dealer and same code, misfire Cyl 6. This is after replacing the head per FCA. It probably going to be something simple like injector, or coil pack.. Stay tuned
 
#19 · (Edited)
Just had my cylinder head replaced in a 2014 Limited. P0300 showed up early in December with a misfire on 4, they replaced the coil and plug. Engine light came on a week later with a misfire on 3 this time. Leakage test was at 70%. Took a few days this past week, but they replaced the entire head. 52k miles
 
#20 ·
Which head was replaced ? 2-4-6 is on the right as you face the engine from the front & 1-3-5 is on the left. 3 is on one side and 4 on the other.


I started seeing misfires long before the CEL ever turned on.


MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 193Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 679Count
PASS


Note: these were before the CEL light ever turned on but a normal run looked more like this:


MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS


Anytime you get over 40 or 50 you have a problem.


Now keep in mind that anything that can slow the engine - bad plug, injector, valve, lifter, wire, etc can trip a P030x.
 
#21 ·
Hello everyone,

I was on my way to work today on the highway. I had the cruise control set at ~70mph and all the sudden my engine started hesitating and the check engine light started flashing. I know that a flashing CEL is bad so I immediately pulled off to the shoulder. When I came to a stop, the CEL turned off but the Jeep was shuddering and idling very rough. I turned the engine off and tried to figure out what to do next.

I was figuring flashing CEL = Jeep was going to have to be towed. Traffic was whizzing by me at 70+ mph and I was very close to my exit, so I decided to attempt to get off the highway to a safer location. When I started the Jeep back up, the idle was back to normal and there was no shuddering. The CEL came on but, this time, it was solid instead of flashing. I started driving again and the Jeep seemed to be running normal except for a very slight hesitation, but nothing compared to the original hesitation.

I ended up making it all the way to work with no issues. I called the Jeep dealer that's local to my office and asked if I could bring it in but they told me they were too busy and couldn't take any appointments until next week. :rolleyes: So, after work, I carefully drove the Jeep back toward home and took it my local dealer since they don't require appointments for service. Again, the Jeep seemed to be running normal - just a very slight hesitation in comparison to earlier.

The dealer diagnosed the CEL and told me I need a new cylinder head. They ordered the part and said it will hopefully be in next week. They released the Jeep back to me and said it's OK to drive until the part comes in. They just said I might notice some hesitation though.

I did some searching and saw quite a few posts about this issue for 2011-2013 WK2s but I didn't really see anything for 2014+ WK2s. I was just curious if anyone else has experienced this issue with their 2014+ WK2? I'm a little surprised that a vehicle with only ~10,500 miles needs a new cylinder head. Also, is it really OK to drive the Jeep until the part comes in?
I had the same issue twice with mine black on black 2014 v6 limited
 
#25 ·
Just got my 2012 jeep Sahara unlimited back from the dealer, they replaced the cylinder head and all the others parts that go with it, I only had to pay the deductible, I was lucky that I didn’t have to pay the total amount of $3200 after I’ve told them that I’ve called jeep headquarters and they gave me a complaint case number due to the fact that my jeep only has 27000 miles and the extended warranty had just expired on February, because of a
cylinder head recall in 2012.
 
#26 ·
Jeep did do some redesigns but were still suffering head issue’s after 2013, they did identify issues with low octane gas causing knock sensors to fail thus causing lifter failure, yada, yada, yada, anyway they did put out a bulletin about running higher octane I believe at least 89 which seems to alleviate the problems.
I run Sunoco Premium in all my Vehicles and also use Berryman’s B-12 every other tank. I would also caution against long idle times in any vehicle over 4-6 minutes due to oil distribution. So when we sit in the Jeep and the Mrs. runs in the store for 15 minutes don’t let it run the entire time, turn it off and save your engines. Most fleet operation’s on gas engines that have long idle times Ie; Police departments have their vehicle’s replaced every 2-3 years because of long Idle times. It doesn’t allow for proper oil flow thereby prematurely wearing internals.
Mac
 
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