Impressed with the Grand Cherokee and Pentastar V6

[OVERKILL]

Originally Posted By: kkreit01
The "head issue" affects 0.5% of Pentastars.


According to Allpar:

http://www.allpar.com/news/index.php/2012/08/pentastar-head-issue-in-depth

Originally Posted By: Allpar
According to Vellequette’s story, over 1,300 vehicles were affected at one point; around 500 new cases are developing each week. The problem appears to affect around 1% f the engines made, and results in a ticking sound, with stalling in some cases, along with illumination of the check engine light. Chrysler blamed the issue on “an unusual combination of factors,” including low quality fuel.


It is ~1% according to these guys, though the article they cite lists it as ~0.5%

 

[OVERKILL]

I don't know if I agree wit this though:

Quote:
He said the malfunctions were the result of "an interaction of a lot of rare things that ultimately come together to affect a small percentage of the population." Those could include different fuel mixes and the way the vehicle is driven, he said, though he did not explain further.

Lee said there are limits to the percentage of Pentastars that will experience the malfunction because of the variables involved.

"You have to have this fuel characteristic, you have to have this drive cycle -- and all of these things have to line up in order to have this situation occur," Lee said. "That's why" the number of potentially affected engines "is so small. If it were a design defect, or if it affected [a basic component] like the integrated exhaust, we'd have issues on everything, which we don't."



Read more: http://www.autonews.com/article/20120813/RETAIL07/308139957#ixzz29yohylLQ


I certainly think it IS a design defect. Because that same "perfect storm" does not cause head failures on anybody else's engines.

 

[kkreit01]

http://www.autoweek.com/article/20120813/CARNEWS/120819959

Betts said the problem has been found in about half of 1 percent, or about 7,500 of the about 1.5 million Pentastar engines that were built over the past two years. Betts acknowledged, however, that more problem cylinder heads could surface.

Sure, if you read the forums, one would think ALL have this issue. Just because 50 people replied with the same problem -- doesn't mean all do. People often join forums simply to report problems. I wouldn't be scared to buy another one tomorrow.

 

[OVERKILL]

Originally Posted By: kkreit01
http://www.autoweek.com/article/20120813/CARNEWS/120819959

Betts said the problem has been found in about half of 1 percent, or about 7,500 of the about 1.5 million Pentastar engines that were built over the past two years. Betts acknowledged, however, that more problem cylinder heads could surface.

Sure, if you read the forums, one would think ALL have this issue. Just because 50 people replied with the same problem -- doesn't mean all do. People often join forums simply to report problems. I wouldn't be scared to buy another one tomorrow.



That's what I said, that the article they cite lists 0.5%, whilst they list 1%

But they also say:

Quote:
However, he said the average weekly demand had risen to more than 500 new requests.


And if that keeps up, the percentage is going to keep increasing.

 

[Clevy]

These people in the forums complaining remind me alot about the mustang six speed trannies. 15 people reported a problem and the forums blew up,guys freaking out,dealers getting pounded by unhappy customers who think they got a lemon. It was funny actually.
The getrag tranny did have issues but very few did and it was apparently only trannies built between a certain timeline.
Tremec never had any problems in any mustangs,and they were used since the forever almost.

 

[kkreit01]

What's even worse, and more depressing, was being on the one and only Chrysler Aspen forum. There weren't very many Aspens from 07-09. The only reason people joined, was to report issues. If you read that forum, one would think all have electrical issues, water leaking issues, etc. Mine was never on the shop once.