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possible problems with some 3.6 pentastar engines

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Old 08-16-2012 | 04:50 PM
  #741  
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Originally Posted by JKbender
An article in Auto Week on 8/13 stated that they just started making the new heads 6 weeks prior. So from that I would infer that the build date range goes all the way up to some point in early July... BTW this sucked to learn as mine was built in June, I almost made it.
Me too. Almost.
Old 08-16-2012 | 06:38 PM
  #742  
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You know after reading the response from Chrysler in the articles I find it completely BS about rare driving conditions and grade or Quality of fuel used. My JKU gets driven in all sorts of conditions rough hard easy I've towed over 3500 pounds with it highway trips city trips and just last weekend a couple of mountain trips and yet knocking on wood just turned 7000 miles today I have no issues.

I'm pretty sure it's going to come around one day ill have head issues and need it replaced but I'm just got to drive it as it is and keep enjoying it until I get my cel.

9/11 or 8/11 build date
Old 08-16-2012 | 06:54 PM
  #743  
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So...are we now saying that it is inevitable that all JK12s will eventually develop a bad head condition sometime in its life - sooner or later?

Or is this a rare issue with just a small percentage of Pentastar engines (but a much larger percentage of JK-Forum JK12 owners)?

Last edited by lanslide; 08-16-2012 at 06:57 PM.
Old 08-16-2012 | 07:01 PM
  #744  
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Well according to Chrysler they're now replacing the driver side heads with more heavier built heads.

So you tell me what does that mean ?

Does that mean were driving around with V-6 engines that have crappy built heads ?

Does anybody remember the code 53 Cummins diesel block that was put in the Dodge Rams ?

I guess what I am saying is I am expecting the worst and driving it and enjoying it while it is running good.

Is the real question would you have bought a 2012 when you bought it if you knew that you're going to have issues with the head ?

I must admit I am extremely attached to my wrangler and I probably still would have bough it.

So now the question is is the inevitable inevitable
Old 08-16-2012 | 07:05 PM
  #745  
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The reason CCUChris is so hostile is because unlike most of you CCUChris has recent experience dealing with Chrysler at all levels.
I have not been happy from the dealers to the 3rd tier of the cusomter service team.
SO was I paranoid?? YUP Do I have a tick YUP Do I think it will be fixed correctly NOPE

IT's not fun and from the article you should be able to read between the lines and see if they put out that kinda BS in a article imagine the BS they give to their unsatisfied customers.

One more thing show me an AB head with 5000 miles on it .

I dont understnad if I could not trust this company to sell me a quality vehicle in the first place why should I trust their so called "fix"

So if I bought a car that was suppose to average 20 mpg and it gets avg 16 mpg. Then I m loosing 4 miles on each gallon of gas. So at almmost $4 a gallon I am eating the cost of the extra milage until I get a CEL. I was not thrilled about buying a car that only got 20 mpg. I was willing to sacrifice the lower milage (talking the 20 mpg) for the Jeep Wrangler. I sure would never had bought a car that got 16 mpg not considering the high number of miles I have to drive.

Was the 90s transmission problem ever fixed? No they just kept replacing transmissions
Was the cummings diesel problem ever fixed? No they just replacing engines and weainrg people down.

a bad year is a bad year

Last edited by ccuchris; 08-16-2012 at 07:28 PM.
Old 08-16-2012 | 07:21 PM
  #746  
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The JK12 is not a bad year for the truck...just potentially a bad year for a small percentage of heads. Even if the heads need to be replaced out of warranty (worse case scenario) - how much could that work cost - less than $1,500? That's better than the loss of money you'd have by selling it or trading it in.
Old 08-16-2012 | 07:31 PM
  #747  
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Originally Posted by lanslide
The JK12 is not a bad year for the truck...just potentially a bad year for a small percentage of heads. Even if the heads need to be replaced out of warranty (worse case scenario) - how much could that work cost - less than $1,500? That's better than the loss of money you'd have by selling it or trading it in.
I am trying really hard not to come across hostile or as I think I was referred to a drama queen. But you think 5 years from now the 2012 will not be referred to as a bad year? "The year all the heads blew on those"
Old 08-16-2012 | 07:39 PM
  #748  
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At the risk of sounding overly optimistic and positive - the JK12 is a great year for the Jeep...an excellent combination of a nicely designed interior and a powerful engine. So what...an easily replaced part of the engine might need to be replaced - no big deal. I look forward to driving my jeep every day - damn fun to drive.
Originally Posted by ccuchris
I am trying really hard not to come across hostile or as I think I was referred to a drama queen. But you think 5 years from now the 2012 will not be referred to as a bad year? "The year all the heads blew on those"

Last edited by lanslide; 08-16-2012 at 08:38 PM.
Old 08-16-2012 | 08:22 PM
  #749  
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I think everyone just needs to take a deep breath, relax, learn to accept that there is a problem, and that there is a fix for it, and it's under warranty. As for me, when and if the day comes where I need to have the heads replaced, I might try to sweet talk the dealer into letting me borrow the new heads for a day and take them to a performance shop here in town and have them do a personal inspection(perform a port and polish) and maybe squeeze a few extra ponies out of it. Hell we do this all the time in the racing world and pay big bucks to have it done. Actually kinda looking forward to it. No point in getting excited over something you have NO control over.
Old 08-16-2012 | 08:36 PM
  #750  
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CCU Chris

You should have owed a wrangler with the 3.8

That thing has some noisy injectors. Pull up at a drive-thru and man could you hear it.

But the pentastar is such a massive improvement IMO from the 3.8. With a fully loaded JK Sport 6sp manual trying to do 75 in a hilly area was very challenging.

Now trying to compare it to the 4.0 is hard to do because my 2000 TJ sport with the 5sp manual moved very quick.

So ok they made a screw up on the heads. I'll wait and let them fix it if and or when it happens.

As far as what to expect from a $31,000 vehicle

To have owned an older TJ and calling it your toy because that's what they were back then. I had a TJ and Honda SUV for family trips allows you to fully respect the new JKs so much more.

I now own a 12 JKU. Sticker was 32k. Is it worth it ? Well depends which way you look at it.

Being able to switch from a soft top to a hardtop is priceless

Being able to take the top completely off is priceless removing all the doors is priceless

If it gets soaked by rain while it's naked it still will run and drive and it dries itself out.

The fun me and my family have had with our Wrangler has just far surpassed any other vehicle we've ever ever own.

However with that all said and done you still have to understand that you bought a Chrysler product and not a Toyota or Honda or whatever well made engineered auto maker there is.

Last edited by Chadc880; 08-16-2012 at 08:39 PM.


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