MDS delete on 22 Ram with 5.7L

[Wild one]

thats pretty much the point that UTG in the video posted was making, the lifters are almost horizontal, it is what it is theres not much to do about it. those grocery getters running 5 or 0w20 mystery oil (with extended OCI) idling all day long and driving always under 1500 rpm will be the primary victim of lifter failure.
funny enough, even though this is the first time i have watched one of his videos, his perfect recipe for success is what I already do. drive it like you stole it, good oil (5w30 5w40 i prefer euro spec) change the oil often (3 to 4k miles max for me) avoid unnecessary idling
bingo

If you've never watched this video,it's another good one to spend 13 minutes to watch. He goes into more detail on the hemi's lack luster oiling system then Tony does.
One thing nobody ever mentions is the head gasket,the oil hole in the head gasket is a tiny little hole,and restricts oil flow to the rocker shafts even more

We look into the Hemi lifter failures and the dreaded Hemi tick

We unpack the lifter oiling issue that plague the late Hemi.Powellmachineinc.comIf you want to support us financially https://cash.app/$PowellMachine

www.youtube.com

Another one that's worth watching if you haven't watched it

Is MDS Damaging Your HEMI? The Answer May Surprise You!

I feel like MDS has been unfairly made the culprit for the lifter failures we see on Gen 3 Hemi engines. In this video I explain exactly how the system works...

www.youtube.com

 

[Biggfoot44]

Ok , l'm new to this , still rabbit hole -ing on the topic . Intuitively on the surface ( pun not intended ) of it , l'm interpretation something like this :

Scenario A - As came from factory , default operating mode , and 4 cylinders deactivated 50 % of time . ( YMMV , etc, but somewhere more or less in the middle ).

Scenario B - Driver uses gearshift ( or something else ) , such that the cylinder deactivation , never deactivated.


Intuitively - If not using the cylinder emasculation is harmful done 100 % , or 99% , then it would still be harmful 50% of the time , in automatic emasculate mode .

Or flipped around , if it's OK to run on all cylinders half the time , what's the potential damage from running on all cylinders , all , or almost all the time ?

[ The more l learn about Gen lll Hemi , the more l Jones for a 5.2 Magnum. ]

 

[Wild one]

Ok , l'm new to this , still rabbit hole -ing on the topic . Intuitively on the surface ( pun not intended ) of it , l'm interpretation something like this :

Scenario A - As came from factory , default operating mode , and 4 cylinders deactivated 50 % of time . ( YMMV , etc, but somewhere more or less in the middle ).

Scenario B - Driver uses gearshift ( or something else ) , such that the cylinder deactivation , never deactivated.


Intuitively - If not using the cylinder emasculation is harmful done 100 % , or 99% , then it would still be harmful 50% of the time , in automatic emasculate mode .

Or flipped around , if it's OK to run on all cylinders half the time , what's the potential damage from running on all cylinders , all , or almost all the time ?

[ The more l learn about Gen lll Hemi , the more l Jones for a 5.2 Magnum. ]

Watch all 3 video's,and you'll know more about the hemi's lack luster oiling system then most guys. Uncle Tony shows what happens to the lifter when you keep oil flow from it's bore,which happens when it runs on all 8 cylinders.They use oil pressure to push the pins in on the lifters to drop cylinders, aka MDS mode

 

[ramffml]

Ok , l'm new to this , still rabbit hole -ing on the topic . Intuitively on the surface ( pun not intended ) of it , l'm interpretation something like this :

Scenario A - As came from factory , default operating mode , and 4 cylinders deactivated 50 % of time . ( YMMV , etc, but somewhere more or less in the middle ).

Scenario B - Driver uses gearshift ( or something else ) , such that the cylinder deactivation , never deactivated.


Intuitively - If not using the cylinder emasculation is harmful done 100 % , or 99% , then it would still be harmful 50% of the time , in automatic emasculate mode .

Or flipped around , if it's OK to run on all cylinders half the time , what's the potential damage from running on all cylinders , all , or almost all the time ?

[ The more l learn about Gen lll Hemi , the more l Jones for a 5.2 Magnum. ]

Yeah, it makes no sense. The 6.4's in the 2500 come with MDS as well, can you imagine how much "damage" they'd be doing towing max loads with MDS not active?

It's a bogus theory, sorry guys. It just is.

 

[Curmudgeon]

Ok , l'm new to this , still rabbit hole -ing on the topic . Intuitively on the surface ( pun not intended ) of it , l'm interpretation something like this :

Scenario A - As came from factory , default operating mode , and 4 cylinders deactivated 50 % of time . ( YMMV , etc, but somewhere more or less in the middle ).

Scenario B - Driver uses gearshift ( or something else ) , such that the cylinder deactivation , never deactivated.


Intuitively - If not using the cylinder emasculation is harmful done 100 % , or 99% , then it would still be harmful 50% of the time , in automatic emasculate mode .

Or flipped around , if it's OK to run on all cylinders half the time , what's the potential damage from running on all cylinders , all , or almost all the time ?

[ The more l learn about Gen lll Hemi , the more l Jones for a 5.2 Magnum. ]

It may or may not be relevant in this discussion but it is likely to matter eventually - you have a Gen 4 truck and Hemi. Gen 4 ran from 2009 - 2018 model years.

 

[Wild one]

Yeah, it makes no sense. The 6.4's in the 2500 come with MDS as well, can you imagine how much "damage" they'd be doing towing max loads with MDS not active?

It's a bogus theory, sorry guys. It just is.

When you're towing the engine is up in revs,of course it's getting more oil to critical parts as there's more oil being flung around the crankcase,it's when you're cruising down the road unloaded and the revs are in the 1500 to 1800 rpm range where mds becomes beneficial.
For some reason you have a very unfounded hate of mds,with no evidence to back up your passionate hate of the system
Yes i'll agree your theory is totally bogus

 

[ramffml]

When you're towing the engine is up in revs,of course it's getting more oil to critical parts as there's more oil being flung around the crankcase,it's when you're cruising down the road unloaded and the revs are in the 1500 to 1800 rpm range where mds becomes beneficial.
For some reason you have a very unfounded hate of mds,with no evidence to back up your passionate hate of the system
Yes i'll agree your theory is totally bogus

No sir. Crank fling is not getting inside the lifter bores. That's pressurized oil.

I don't hate MDS at all, I just don't want to use it in my truck and have seen zero evidence that using the same software to turn it off, that it does naturally all on its own, is somehow going to cause a problem. This isn't some aftermarket "hack" to make it work outside of how it was designed.

 

[Docwagon1776]

It may or may not be relevant in this discussion but it is likely to matter eventually - you have a Gen 4 truck and Hemi. Gen 4 ran from 2009 - 2018 model years.

No, he's correct. The generation of the motor does not track with the generation of the truck. All hemis 2003-present are Gen III.

 

[Wild one]

No sir. Crank fling is not getting inside the lifter bores. That's pressurized oil.

I don't hate MDS at all, I just don't want to use it in my truck and have seen zero evidence that using the same software to turn it off, that it does naturally all on its own, is somehow going to cause a problem. This isn't some aftermarket "hack" to make it work outside of how it was designed.

Well we're just gonna have to agree to disagree on this one,even though you're wrong
You're not changing my mind about the oiling benefits of running in mds mode,and it appears like i'm not changing your mind,no matter how much info i post that discredits your theory

 

[Curmudgeon]

No, he's correct. The generation of the motor does not track with the generation of the truck. All hemis 2003-present are Gen III.

I did NOT know that! Thanks for the correction.

 

[DeckArtist]

No its not, If that was the case every HEMI in norther Canada would be ticking.

The issue is the low oil pressure at idle. Not the idling itself.

Thats why every Tuner sets the idle at 750 rpm to get 50 psi at idle.

Literally just proved my point. High idle hours+low pressure=failure of the lifters and valvetrain components. Sorry to have neglected to add low pressure to the post, thought ALL Ram enthusiasts knew that part....jeez loweez...cap'n obvious has entered the room

 

[DeckArtist]

Well we're just gonna have to agree to disagree on this one,even though you're wrong
You're not changing my mind about the oiling benefits of running in mds mode,and it appears like i'm not changing your mind,no matter how much info i post that discredits your theory

Which begs the question why have they not fixed this yet?

 

[DILLIGAF]

Which begs the question why have they not fixed this yet?

EPA plain and simple, thats why you have to DIY this part.

 

[Wild one]

Literally just proved my point. High idle hours+low pressure=failure of the lifters and valvetrain components. Sorry to have neglected to add low pressure to the post, thought ALL Ram enthusiasts knew that part....jeez loweez...cap'n obvious has entered the room

Watch the 2 videos in post 41. Low oil pressure isn't really the issue. You can pump all the oil you want through the system ,you're still not putting anymore oil onto the critical parts like the cam lobe /lifter roller