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Old 11-15-2012, 12:49 PM
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Exclamation Disturbing Hemi Catastrophic Failure Rumor

As most of you already know, I am a Ram, Dodge, Chrysler, Jeep tech at a dealership. Occassionally, we talk to Chrysler technical support and hear a few rumors about upcoming recalls, bullitens, and things that just happen.

The other day a coworker was speaking to a tech rep and it seems that some of the newer Hemi engines have a problem with the timing chain guide/tensioner assembly and it's causing the chain to fail in some fashion and evidently it's causing catastrophic engine failure (valves and pistons coming together at high speed).

Now, when asked what "newer" meant, the rep says it is unclear at what point these guide assemblies were installed but he did say that the part is a redesign that was intended to save money. Looks like that's going to backfire.

As of this point, it is also unclear what will be done to identify affected vehicles and what will be done to remedy the problem. I don't know if this is a problem limited to the 5.7 engines or if the 6.4 is also included. I will keep an eye out for more info on this matter and post anything I find. Keep in mind that though the source is a Chryslelr tech rep, it's still just a rumor at this point and I have yet to see this failure for myself.
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Old 11-15-2012, 12:50 PM
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Thanks for the heads up. I hope this isn't true for their sake.
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Old 11-15-2012, 12:59 PM
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Well I'm glad I have completely voided my warranty yet lol
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Old 11-15-2012, 01:20 PM
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Could this be related to the issues with the challengers?

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Old 11-15-2012, 02:00 PM
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Man RamTech, you really know how to start some worrying with this one. But my honest feelings about this rumor is this..........Was it really the fault of the tensioner or was it the fault of the operator's maintenance habits. Low to no oil pressure to the cam chain tensioner sounds more like the path to this failure. Because I really think we'd have a whole batch of locked up, tooth skippin', Hemi's by now. Especially with the one's nearing 100K bud. Seriously though, you think if our 345's fail, we can opt for the 392 installed instead?
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Old 11-15-2012, 02:24 PM
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As I understand it, this isn't an isolated incident and it's happening on "newer" engines. I would assume by newer, they are referring to the Eagle engine and possibly a production run from the last year or two. The Hemi tensioner isn't hydraulic, but rather a spring against a guide shoe.





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Old 11-15-2012, 02:47 PM
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Soooooo...what year owners should be worried here?
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Old 11-15-2012, 03:18 PM
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No idea. They only said newer Hemi's but haven't been able to narrow it down yet.
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Old 11-15-2012, 03:29 PM
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Well, thanks for the heads-up, I am glad you are around. I will take a peek at mine and see how she's doin next oil change. With only 30k I can't imagine I need to be worried yet.
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Old 11-15-2012, 03:35 PM
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Thanks for the info! I am looking forward to updates!
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