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  #205  
Old 07-18-2011, 12:26 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

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Originally Posted by bigpanda View Post
I saw a WK2 at the dealer last week and it had its engine totally taken a part. I asked them what caused the problem and they said "leakage of water coolant".
I am guessing it was a 3.6 not a 5.7?
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  #206  
Old 07-18-2011, 12:42 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

Wow must have been some high revs going on.
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  #207  
Old 07-18-2011, 01:12 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

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Originally Posted by Bigv8jeep View Post
Wow must have been some high revs going on.
Or a design flaw with the head gaskets, heads or block castings. Foam cast blocks and heads are famous for porosity issues and other imperfections. Sand cast is better process as it yields fewer imperfections and porosity. Not sure which way the pentastar heads and blocks are made. The aluminum heads on the 5.7 are definitely sand cast.
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  #208  
Old 07-19-2011, 01:52 AM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

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Originally Posted by xj31 View Post
Here's something new.Maybe Chrysler took a second look at this.
Does any of youguys know the part # of this plastic bumper thingy and the front hood seal on driver side referred in this thread somewhere?

Can't find it from trademotion.com. Thanks.
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  #209  
Old 07-20-2011, 02:04 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

The seal on the hood is 68084597AA,it's actually called a "snow blocker".
The little one in the front of the air inlet,I can't find that number.
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  #210  
Old 07-22-2011, 02:00 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

I just stumbled upon this thread. Reminds me of a (somewhat) similar issue I had several years ago...

I had '98 Ford Explorer that I'd been driving for maybe close to two years.

One day at the office, I went out to lunch. Drove to the restaurant just a couple miles away and when I pulled into the parking lot and stopped moving, I suddenly noticed tons of smoke coming up from underneath. Looked under, and I was leaking oil. It was not just dripping; it was pouring. If I'd driven it much further, it would have been catastrophic. The smoke was the oil burning up that had sprayed on hot engine block.

I got it towed to the dealership. After they looked at it, they could find nothing wrong other than it was obvious that the oil filter had been blown out from the inside. (So that was the oil leak source.) Because no particular part could be pointed to as failing, they were pulling the "we can't cover this under warranty since we don't know for sure that a warranteed part is what failed" line on me. They basically wanted to just replace the filter, fill her back up with oil send me home.
Luckily, i didn't have to fight much. They gave Ford Engineering a call and the engineers felt that pressure must have built up inside the engine so high and fast that something had to give and it was the oil filter that gave. Engineering's attitude was that it should not have happened and they wanted to know why it did. Because of that, they wanted the engine so they could do an 'autopsy'. So my dealership swapped out my engine and dropped in a new one, and shipped the old one off to Ford Engineering. The whole thing was paid for by Ford.
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  #211  
Old 07-24-2011, 01:25 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

I was closely involved in a situation where a 2005 WK diesel inadvertently was driven through deep water (over 3 feet) and ingested more water than was good for it. The engine blew a lot of white smoke and stopped. The inexperienced driver (a car salesman from the Jeep dealership) just wound the key and it fired up again and apart from a slightly off beat idle, the engine appeared to have suffered no serious damage.

However, this vehicle which at the time was a used trade in owned by the dealership with 73,000kms, continued to sound a little "off beat" so it was pulled down and found to have one quite noticeably bent connecting rod, which ended up as a paper weight on the dealer principal's desk as a constant reminder of the incident.

The subsequent repair, that was covered by the dealerships insurance ended in excess of NZ$30,000!!! The connecting rod could not be purchased on it's own. It had to come as a set with a crankshaft and pistons!! - That was close to NZ$20000 on it's own.

A friend of mine now owns that Jeep which now has 127,000km on the clock and is still purring like a kitten.

I have been avoiding any water crossings deeper than damp grass ever since

Cheers Chris
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  #212  
Old 07-31-2011, 10:59 AM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

Went through this, very interesting read!!

I just bought a 70th WK2 V6 and I have the "snow blocker", the plastic cover that is supposed to come with the front skid plate? (without the hole, just blocked) and the hood rubber seal.

Am I safe from a hydro blockage in normal driving conditions? Who knows!!!

Anyway, I love my WK2!... but I am biased as hell since I am still in honey moon... basically, only 48 hours with me!
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  #213  
Old 07-31-2011, 03:28 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

Well 70th, since I'm the one who started this particular posting, I too am biased, and can say that my Aug2010 built WK2 had no hood (snow) seal, no dam next to the air intake and no cover over the hole in front of the engine, despite being trail rated. Since water was ingested after driving thru a foot of water and the engine blew 700 miles later, I had no success with Chrysler in convincing them they may have a design flaw. I just find it interesting that all these extra parts started showing up on new vehicles about 2 months after my engine blew up. As of today I still have only been able to get the hood seal added (and Chrysler WOULD NOT COVER THE $7.00 part under warranty)!! The dealer can't find a part number for the other parts. So if it plans to rain, I leave the Jeep in my garage and drive my trusty 2003 Pontiac Bonneville, which has the air intake correctly designed, inside the fender well!!
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  #214  
Old 07-31-2011, 08:37 PM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

Wow COST554... I just can't believe that they did not cover that.

Truly interesting all recent additions. Since I have one of the "latest 2011 batches"... I uploaded those images exactly to point that... those additions.

Sad about your case, but glad you post your experience here since we can learn... thanks for sharing you story.

Best wishes to you man!
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  #215  
Old 09-09-2011, 01:59 AM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

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Originally Posted by rdalcanto View Post
Time to lawyer up....
I know someone who did just a few months ago on a denied warranty claim. They ended up getting a check for $10,000 in the mail from Jaguar.
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Old 09-09-2011, 02:06 AM
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Re: 2011 Jeep Grand Cherokee 3.6L Pentastar V6 BLOWN-UP ENGINE!

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Originally Posted by MSCA View Post
The only way the connecting rod could have possibly punched that hole in the pan is if it were able to drop down completely. And if that's the case, it would have had to been broken due to hydro-lock before it could have ever punched a hole in the pan. I guess it's possible for the broken end of the rod to slip down enough to make that hole.

I actually don't see that much of a bend in the rod itself. It's hard to tell from the pictures, but it looks pretty straight to me. Usually a snapped rod is bent big time. This rod seems to have snapped without bending very much. It's definitely cast (not forged) and doesn't seem all that robust.
I'd be glad it broke and not and everything else. When I threw a rod it not only broke the block, oil pan but also the crankshaft.
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