There are two things they need to look into if the chain is not holding tension. First is tension as noted before. Second is dampening. Both need to be properly set to keep the chain tight but not so tight that the chain prematurely stretches.
I hope this report is true so we can finally get this behind us. If the assessment is true, no chain or sprocket swap will hold up in the long run. No double roller or even triplex chain.
Mine just broke...2010 mopar 10, no mods, auto, 40,000 miles, was pulling in to a gas station and the engine died and wouldnt start. Didnt hear any noise other than a few days prior heard a sound from under hood similar to alternator or water pump bearing going bad. Dealer said at first was a camshaft sensor, then changed their mind and said it was timing chain and the tensioner was broken which was probably the noise I heard. Its been in the shop 2 weeks now, waiting parts, dealer says they sent the heads out to get them inspected, didnt know why until I read this post. I didnt realize the 5.7 was an interference engine. I knew I should have kept my cummins LOL. Ill repost when I get more news. Complained online to chrysler corporate and someone called me and offered to inquire about it, but I doubt they will do squat. I know this: they better fix it right. Im retired Army and have nothing better to do than fight to the death with these bozos. I like my M10 dammit. One other thing, I've been noticing when the MDS kicks on and off a slight jerk in the driveline, similar to how it feels if the A/C compressor is kicking on and off...I shifted out of drive to 5 and the sensation stopped. This could have been an early warning sign about the tensioner? Just saw post from Savoy1964 quoted by conceptmachine.
This is the first one to break not cruising at highway speeds I've heard of
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'10 Challenger R/T
Flowmaster cat back, K&N cai
Machanic friend just called and they just got another 2010 with 39000 in today. He was returning from hunting when it died. Also heard this could become a recall/TSB customer satifaction i think he called it.
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Stone White 2009 Challenger RT-K&N Cold air kit, Billit Oil, 85mm TB, Flowmaster, Diablo 91 tune New Best 13.093 at 106.53mph
White 1964 Plymouth Savoy 512 Stroked 400 New Best 9.75 at 138.5mph
White 2003 Dodge Cummins-K&N Cold air kit, Valve body and torque converter, 4" Stanless Exhaust
Machanic friend just called and they just got another 2010 with 39000 in today. He was returning from hunting when it died. Also heard this could become a recall/TSB customer satifaction i think he called it.
Where did he hear about the possibility of a recall?? Please keep us posted on this!
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2010 Hemi Orange Dodge Challenger 5.7 Hemi
1967 RS Camaro 400 Small Block Chevy
1997 Ford Explorer V6 4.0
This is the first one to break not cruising at highway speeds I've heard of
I think that the cruising speeds with MDS on were the smoking gun. But we always inferred that if sustained MDS operation caused a problem, it didn't mean that there was no damage done during all activations. It's possible that while cruising the resonance is given enough time, and is therefore more likely to do the tensioner assembly in, but that the cumulative effect of MDS use can hit at any time. While it takes a good number of well-placed punches to get a knockout, you can get lucky and deck someone the first time you connect. Plus you have to account for differences in driving conditions and styles. Seems like 40,000 miles has been the 'magic' number, though, like steady highway speeds have been a recipe for the death blow to come.
[QUOTE=stealthes;1200583]Sounds like something positive is happening. A recall to replace tensioner and shoe would not put Chrysler out of business.
Especially if they send out the notices to the older cars first and then work their way up to the newer ones over time, they could also use oil change statistics of mileage to create a list of which ones really needed to be done right away. Certainly, anything under 20,000 miles could probably wait while higher mileage ones are done first. I also wonder what percent of cars actually get the recall work done? (for a fact they don't all get it, as cars are sold and new owners don't necessarily bring older cars to the dealers for work).
Where did he hear about the possibility of a recall?? Please keep us posted on this!
Info comes through my friend... through his contacts with repairing these failures. This gives me hope of a recall/fix before mine or his challengers go through this failure. I was considering having him replace the chain and parts before they fail now I just hope it happens that Chrysler does something.
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