Rebuilds

Actually in many cases the rebuild is better then the original. I have torn down and rebuilt engines from the bottom end up. I can rebuild to closer than factory tolerances for Ford, Gm and Chrysler products. No need with Porsche and BMW engines. BMW engines with 300K miles the bottom end is just broken in.

With the cylinder head(s) and manifolds a rebuild allows to do some work to match the manifolds to cylinder heads and some porting and polishing.

So a rebuild can be better then stock. In most cases it is.

 

Maybe if you are the one doing the work on your own vehicle instead of a tech who is trying to get it out of the shop.

It is still unacceptable to happen at 35k/9 months old. That is my point.

BTW this is my 9th Jeep... No desire to promote loyalty from Chrysler

 

Why did they do a complete teardown?

If the tech debated whether to pull the engine I can't imagine he was thinking complete teardown; I don't see how you can reasonably do a "complete teardown" without pulling the engine..

Just kinda wondering, 'cuz if all they did was yank the heads, then the engine hasn't "been torn down that deep"..

 

An engine torn down that deep and extensive will never be the same (you guys know that)

Lol! How do you figure? Happens all the time to all kinds of engines. If the tech is not full tard then no worries!

 

I agree with Dave2002. It can sometimes come out better. I had to pull the head off my 98 TJ. I did all the work myself, and torqued the head bolts down to factory specs, and it actually ran smoother afterwards than it ever did.

As long as the mechanics aren't complete morons, you shouldn't be too worried. I'd be more worried about them scratching/denting the fenders while working on the motor. Good luck.

 

2011 Grand Cherokee Laredo 4x4

9 months old, Pentastar V6

Mileage at incident 35,000 ( I drive it as my work vehicle)

Error P0304 Cylinder 4 Misfire, Shuddering and stumbling at idle

Burnt Valves, Pitted Valve Seats Resulting in Complete Engine tear down and head replacement. Techs debated pulling engine to repair. Out of commission 15 days.

Sorry to hear this, very disappointing and I'm sure you're discouraged. I would be too. Hopefully the rebuild goes well and everything is taken care of for you.

For the rest of us - did you have any trouble, noises, knocking, warning lights, etc. before this or did it just happen all of the sudden? I hate reading these stories because it makes all of the rest of us wonder if we're next.

 

Maine- I know I dont mean to scare you but I was on my 5th oil change I believe, all done at the Dealerships and one day while driving out of a parking lot the check engine light came on. I took it straight in and they ran the code and it was P0304, reset, on my way.

Next day sitting at stoplight, starts stumbling slightly and light comes on, take it straight in, same code. They call chrysler who say they need to do compression leak down test. but need special adapter that is in shortage and has to be ordered.

Finnally comes in and result is 60% loss of compression in that cylindar.


My biggest worry is what caused the valves to wear prematurely? What caused them to pit? Running too lean/hot? is the passenger side head the next to be repaired??

 

Heath- so you would have no worries or reservations taking your 9 month old engine into a jeep dealership and letting a mechanic there tear it down to replace the head to say teach a class or something. Because "it happens all the time" Give me a break

 

Wow, that really sucks. I can't believe it just happened all of the sudden like that. Best of luck with the fix. There have been a lot of these threads relating to 12' JK Pentastars but I really didn't think the '11 Grand Cherokees were in the same boat. I guess I'll keep my fingers crossed. At least yours occurred at 35k - 1,000 miles more and they probably wouldn't have done s**t to help you.

 

An engine torn down that deep and extensive will never be the same (you guys know that) This is a 90% highway miles engine that is defective.

First, I'm sorry to hear anyone having a problem on a young engine. However, if you saw how the engine was originally mass-produced (mfr builders pumping them out as fast as they can) you might reconsider that a rebuild will never be the same when as others stated it can and probably will actually be better.

 

While this sucks and i hate to hear anybody going through this. But, Chrysler is doing what they should and I don't see how this is a disaster. These things happen and that's why there are warranties. And there is no reason to think that rebuilt motors are never the same, actually isn't that what you want as this one had issues:laugh:

 

Well to be honest with you something went horribly wrong in short order.. Only one cyclinder had an issue? But back to the warranty issue, they don't have to replace the engine to fix your issue. The warranty clearly states they will repair or replaced failed components. Your entire engine did not fail. You should have been entitled to a loaner car but again that varies based on warrantys. If you had extended warranty maybe that would buy you more. You still have the 6 year 100,000 mile power train warranty so I don't think you will suffer on that end. Problem is when we are inconvenienced we all seem to think we are entitled. Sorry but the dealer sounds like they fixed the issue. If anything the time it took is a bit excessive but.... it is now fixed. Did you ask what took so long?? perhaps they had to wait on parts??