possible problems with some 3.6 pentastar engines
07-13-2012, 11:52 AM
#501
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Ugh. 9/22/11 build date 2012 Wrangler Unlimited Sport, bought in Dec of 2011. Yesterday, with 19,550ish miles on it (yes, I drive it), I got the CEL. Dealership reported code p0300-p0302, indicating cylinder 2 misfire. Like other reports I've heard, they reprogrammed the PCM per a Chrysler TSB.
Interestingly, I've asked them on my last two visits if they had changed any heads on 2012 Jeeps. "Nope." I'm afraid that's going to change soon. Seems like I've got some reading to do.
While I was there I had them balance and rotate the tires. In the process they gave one of my 3 month old ProComps a deep gash in the lip of the rim, 1.5" long. Wonderful experience all in all.
Interestingly, I've asked them on my last two visits if they had changed any heads on 2012 Jeeps. "Nope." I'm afraid that's going to change soon. Seems like I've got some reading to do.
While I was there I had them balance and rotate the tires. In the process they gave one of my 3 month old ProComps a deep gash in the lip of the rim, 1.5" long. Wonderful experience all in all.
07-13-2012, 09:55 PM
#503
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A awd 2012 gmc terrain the first time, a awd 2012 gmc Acadia the second time, and a 2012 Buick lacrosse the third time but we had 2 throw a fit 2 get them. Apparently they don't give loan a cars for jeeps so they say. They where ok but the ain't a jeep by no means the gmc's would not even climb the hill at the end of my road. My jeep goes up it in 2wd with out spinning. I thought we tore the oil pan out of the Buick car pulling into the gas station.
07-15-2012, 08:53 PM
#504
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3.6 engine Valve problems
hi all . just info for those that have the new engine , just had a conversation with a good friend of my son . this guy is a certified mopar tech for the last several years and naturally a huge mopar fan . any way he related to me about some of his factory training he had and said that there have been cases showing up of these engines dropping valves on the left bank for an as yet to be determined reason . he said thus far it is gc and wranglers this has been proceeded by wisps of smoke from the tailpipe . not huge numbers of these engines but enough he said that it is being looked into as possible parts / materials or assembly defects
07-15-2012, 09:05 PM
#505
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2012 3.6 Valve Problems
guys - go back and read my "update to my nightmare" post #477. If you can't figure out from the noise whether you have an issue or not, or if you can't be sure whether the noise is originating in cylinder head or somewhere else, put your hand on the cylinder head. The feel of bare metal hitting metal is pretty unique - and the feel of the left-side cylinder head will definitely be different from the feel of the right-side cylinder head - IF you're having the issue we've been talking about here. No need for any tools, no need to video and review, you don't need to rev the engine, just touch the sucker and you'll know something's wrong.
07-16-2012, 12:35 PM
#506
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I remember reading about a oil plug in the head that mechanics were forgetting to transfer from the old head to the new. With it MIA there was a lot of noise and kept the variable valve timing from working right. The issue became so predictable that Chrysler changed their procedures and began including the plug already installed in the replacement heads.
I'm not saying I know for sure that's your problem but it might be. There would probably be codes stored for poor or nonexistant variable valve timing function. If it was my Jeep I'd take it back and ask them to check it with the starscan tool. I'd even be willing to pay for the diagnostic service it that's what it took to get them to check it.
I'm not saying I know for sure that's your problem but it might be. There would probably be codes stored for poor or nonexistant variable valve timing function. If it was my Jeep I'd take it back and ask them to check it with the starscan tool. I'd even be willing to pay for the diagnostic service it that's what it took to get them to check it.
07-16-2012, 11:19 PM
#507
Is this still something I'll need to look for if I go buy a brand new 2012 tomorrow?
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
07-17-2012, 08:16 AM
#508
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Is this still something I'll need to look for if I go buy a brand new 2012 tomorrow?
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
If it was me, I'd stick with the 2011 for now, let the dust settle on this issue.....then make your move. 'If it aint broke...don't fix it'
Im happy with my 08 and the auto, stock...oil consumption problem is fixed...good to go.
Just my 2 cents...good luck
07-17-2012, 08:37 AM
#509
Is this still something I'll need to look for if I go buy a brand new 2012 tomorrow?
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
Last edited by jkrubcon; 07-17-2012 at 02:20 PM.
07-17-2012, 12:33 PM
#510
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Originally Posted by MeatCurtains
Is this still something I'll need to look for if I go buy a brand new 2012 tomorrow?
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.
My 2011 is rock solid with no oil consumption, but even with the 3.73 gears the lack of power makes me wonder why its even got a 6th gear. Unless I'm rolling on flat ground or down hill I can't use it. I don't want to trade a vehicle that is running fine for one destined to be in the shop endlessly.