You should be fine. As for as 3.6 head issue I've done a Ton of research since my family owns a few jeeps with this motor. So far jeep vehicles built between Aug 2011 and march 2012 are affected. This was due to faulty head manufacturing when they farmed out work to Their sub equipped Mexico engine assembly plant. They did this because of increased demand as a supplement to US head manufacturing. That's why not all jeep 3.6 vehicles are effected. As for durangos they are presumably the same. With a hit and miss depending on which plant your head was made. The majority of affected vehicles are 2011-12s with just a fraction of 13s effected throughout all 3.6 models. Some throw the CODE some developed a heavy "tick" but all will be replaced eventually under warranty. Most developed the problem under 12k miles.

 

The sticker on mine says 15% of parts came from Mexico. I would not want a car that has a cylinder replaced. Resale would go down the drain if a smart buyer checked the carfax.

 

Wow. Lots of information here, but I have just one question: Would an engine with 63,000 miles on it have failed by now most likely? It seems that what I have found is that they typically fail under 20,000 miles. Am I right in this?

 

Don't worry, you will be ok.

 

Thanks. Is that because they would have failed by now?

 

I'm not going to say that you won't developed the misfire, I will say that I haven't heard or read of the 3.6 developing the problem anywhere near your mileage. The nature of the failure is why it develops early in the engines life. I wouldn't lose any sleep bud.

 

I got my misfire somewhere around 30-35K. Got it replaced, and am currently at 57K and not a single issue.

 

I wasn't very lucky and a rare one that had both engine heads replace. A good friend has 130000km on is Durango 2011 and no issue at all.

Both replace before 50000 Km (30000 miles) but now this engine is really running strong... 0$ cost

I'm pretty sure now that I would be able to hit the 200000 miles without any other major issue.

Thanks to my Dodge dealer for the service 10/10

 

The van showed up yesterday with a misfire on #2.

Seriously. I found they took it to the dealer at 63,000 with a P0302 and they were going to bring it back later for repair.

I talked to the S/A at our dealer and he told me to swap the plug and coil around and see if it moves.

Ummm. Yeah. So if I do their troubleshooting for them, how much should I charge them?

I just need to get it to throw the CEL with that code because like a dummy, I cleared it. Although it does have a miss at idle. I think that should be enough to get them to check into it. I'll run it some once we get tags and see what pops up.

 

Well, that went well. I took it in there and they said that there was a possibility that it was plugs or coils and we would have to pay for that, but it's most likely the head. I appreciated his honesty and the fact that it was possibly something else and that part would be on us.

Dropped it off Monday, late afternoon and got it back today first thing. He called me to let me know how things were going and they even changed the plugs at a reduced labor charge. Still $120 for plugs and labor is steep, but I would rather have them do it now than me have to pull the intake in 6-8 months and change them out. I'll wait until 150,000 to change them out now.

So at 63,000 miles the CEL was on (for how long, I don't know). I am guessing that it hadn't failed too long before otherwise it would have gotten really bad. My point is that it appears that these can fail later in life and just because it has over 50,000 miles, doesn't mean that it won't fail.