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This is happening mainly on MDS equipped cars, correct? I have a co-worker that is a mechanical engineer that used to work in the design group of a major auto mfg. The MDS system induces a lot of vibration into the engine. You dont feel it because they put a lot of design time into dampening the vibration with the drive line mounts. Think of what would happen with a 1970 motor if you disconnected half of the spark plugs.
So it might be that if you hit a certain combination of RPM's and load, that you could cause part of the timing chain system to vibrate at a harmonic frequency that causes premature fatigue failure.
Mine is in the shop with a broken timing chain as I write this and I am hoping it is not the beginning of things to come. It has been in there for a week. I have an "10 RT Challenger with 46k miles on it. I would be happy to answer any questions that I know the answer to.
|failure , problems , timing chain|
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