Pulsar 2023 Ram 2500 Power wagon

[Wild one]

As a follow up, I found the video back from Sky where he refutes Uncle Tony and then very clearly states "the block did not change in 2009". A lot of great comments by him in the 5 mins following, and he basically sums up "it's my contention that this failure is due to improper hardening of cams/lifters, this is not a design/oiling flaw".

The END of the HEMI TICK?

The END of the HEMI TICK? As a former Chrysler technician I've worked on Hemi engines for over a decade and I've seen a lot of camshaft and lifter failures. ...

youtu.be

I agree with alot of Sky's video's but i don't agree with his idea of the vvt tunnel totally blocking off the splash that hits the cam. Anytime the engine is running there's a pile of oil flung around inside the block,that's bore out by the fact a catch can will fill up,and if you look at how much higher the pcv system sits in comparision to the cam,there's got to be pile of oil flying around the crankcase,and some of that oil will be making it's way onto the lobe.Sure the cranksplash isn't maybe as much as we'd like,but it's still there.This is part of MMX's article,and they still say there's crank splash,and they're into the hemi more then pretty well any outfit,and way more then Sky ever has,as the hemi is all they specialize in.

In my opinion the root cause of failure is a two-part problem. Issue #1 is the design of the needle bearings of the lifter. The very early HEMI engines had large roller bearings (and a smaller axle) on their lifters. For some unknown reason, Chrysler went away from this design, and made the needle bearings much smaller, and the axle larger. These small bearings do not seem to take the load of being constantly activated and deactivated as well as the early design lifters. The second issue is lubrication. As I mentioned earlier, the only way the actual lifter bore in these engines receives any oil is when the MDS solenoid opens to deactivate the 4 cylinders worth of lifters. This means that during idle, and when the MDS is not active, the body of the G3 Hemi lifter receives NO OIL! (Mild caveat here, the lifter does receive some splash lube up from the crankshaft, but it is VERY minimal as the main oil galley blocks a very large portion of the potential splash lube. Combine this with the very high cam/crank centerline (7.464 Inches-compare that to a small block chevy at 4.521”) and the potential for the lifter to get any splash lube is near zero.

 

[Wild one]

@Wild one , dude you might just need to go back and read my first comments. You keep trying to say I'm some internet guru genius. All of my first comments were literally questions. If I knew the answer I would not have been asking how is this possible? I mean again your original comments were they get low or no oil with MDS disabled. I just asked how that was possibly true. Your answers are just to read another post, and in that post people are giving out super scientific answers, like people who disable MDS are stupid.. or dinosaurs. And when someone else asks you how their motor ran for 200k miles with MDS disabled its just you got lucky... I just questioned how MDS disabled would be causing the cams to fail. I like the video @ramffml just posted above this. The guy, states oil pressure is a problem. at idle. not driving, he also says opposite of what you have been saying about the cam being lubed with oil splash, which I also thought was ridiculous. Watch the video, and I will agree with him, the cams were cheaply made, and they are failing prematurely causing the issues. Not the "low" or "no" oil on the lifters with MDS disabled. Thanks!

Well "dude" if you had an eye and &$$hole you'd have figured out there's no answer to his question,doesn't take much common sense to figure that out.
You couldn't even figure out the head gasket is a big restriction to the upper valve train oiling,even though you're the one who dug up the pictures from an old post