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UPDATE: Okay so I jumped the gun and assumed I had a return lifter problem. It turns out that the Bank 2 lower roller/rocker rail was broke on the #8 cylinder (I believe the exhaust lifter). I'm not sure why, but the rocker rail keeper (what ever you call it) will break and allow the rail to...

Quote Joseph, nice to hear from you again, it's unfortunate that it appears that it may be under less than great circumstances however. If indeed the issue has returned, I think we can safely conclude that you've confirmed that it has nothing to do with the MDS, since you no longer have it. What...

Quote So you went against engineers and redesigned engine with eliminated PCM program then used a heavier (although slightly) oil than recommended and it prematurely failed. HMM Nowhere did you state block was checked or spring pressure. Sounds like parts thrown at it and hoping for the best...

Quote ~50,000 miles in ~1 year is 137 miles a day every day. That's roughly 2.5 hours of driving, every single day. 7.5w-30? crackmeup A car company "designing" engines to fail after a certain point? While yes, they do design for a certain service period, there is no way to reliably design an...

Greetings everyone! Well after about a year of repairing my 2012 Dodge RAM Hemi, it appears the lifter failure is happening again after driving about 50,000 miles since the repair. As a reminder, here is what I did: 1. Replace camshaft to non-MDS cam made by CompCam. 2. Installed MDS plugs to...

Originally Posted by tiger862 So you have 114k miles and this is Dodge's problem? You had it in at 90k then you stated they did something shady to get you pass warranty. WOW is all I have to say. I don't know any dealer that would repair one that is out of warranty by 14k miles unless there was...

Originally Posted by OVERKILL Originally Posted by JosephA Update: The MDS Delete kit has been ordered. Only time will tell. On a side note, GM recognizes the same issue, and has released this information. It is clear that GM seems to care about their customers and product owners. I wonder...

Update: The MDS Delete kit has been ordered. Only time will tell. On a side note, GM recognizes the same issue, and has released this information. It is clear that GM seems to care about their customers and product owners. I wonder when Chrysler is going to step up and do the same. As...

Originally Posted by burla Thanks Joe for showing us the bad news. When you are in the fold of the hemi circus, you realize how prevelant this is, I can't even tell you how many hemi cam lobs I have seen like this. You talk to a bunch of randon hemi owners for a period of 5 years, and it just so...

Here you go folks. The damage was worse than I thought. The cam lobe ground on its edges and part of the top was caused from intake lifter #8 (the one missing 1/3 of its roller and all needle bearings). I was able to recover a few needle bearings in the cam galley. I suspect however the rest...

Originally Posted by OVERKILL Originally Posted by JosephA Greetings all! My apologies for not having posted on here these past few days. I've been extremely busy with personal home life chores, as well as conducting tons of research on the route to take with this troubled 2012 Dodge Ram. I...

Greetings all! My apologies for not having posted on here these past few days. I've been extremely busy with personal home life chores, as well as conducting tons of research on the route to take with this troubled 2012 Dodge Ram. I was about to purchase the MDS delete kit from MMX. But...

Originally Posted by Shannow The cutaway of the lifter had me scratching my head for a while, so I pondered it as I mowed (where I do my best engineering)... Then it hit me, the hydraulic lash adjuster NRV is upside down, indicating flow from above downward...and in order for the lock pins to...

Originally Posted by OVERKILL Originally Posted by JosephA That being the case, what happens to the normal oil flow if the lock-pin hole is left open during "locked" operation? You already know what my theory suggests....but for the record, I did not come up with this myself.....This came from...

Quote 1. The above again assumes there is an oil black hole that results in pressure loss. This is not the case as I've explained. 2. Once something happens, whether it is the driver hitting the pedal or encountering a grade to increase load, the solenoid has the power removed from it, which...

And the main fact you all are purposefully ignoring is this. Since some of you claim that the failed lifters are rare, you still have not explained why both Chrysler service departments and private customers are on hold for lifters, and up to 3 months? Why is their a large demand for such a...

Quote If the lock pin does not lock, that lifter remains in MDS operation, which would be noticeable. Everything else would operate normally. And I've provided numerous examples that show lifter failure happens on non-MDS engines, you claiming that it doesn't at this juncture is utterly...

Originally Posted by Shannow Originally Posted by JosephA I disagree. And if I am wrong, then prove it. If the poppet is stuck open, and the solenoid is closed, the lifter still needs lubrication despite the fact that it's not doing much work. Are you assuming that the lifter in MDS mode does...

Originally Posted by Shannow NO the lock pin does not have to line up with the oil hole...it locks on the circumferential ledge that's machined into the outer body...that also forms a gallery, so the lock pin can be any angle away from the oil hols and still function Interesting. So then, why...

Originally Posted by Shannow OVERKILL is correct on his understanding of the MDS operation. Oil pressure applied to the pins allows the lifter assembly to collapse, but it's simply a regular style hydraulic lifter INSIDE the body of another lifter. The pins remaining stuck in would simply make...