MDS question

[Brandon-w]

Literally says do not bother to reply. What if we all do that..... would you be talking to no one???? Hmmmmm.


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It's tempting to do that. [emoji1787] There's lots of words being written but no facts whatsoever. Think I'm gonna block this guy too, I don't see any thing productive coming out of him on this forum except disturbing others.

 

[boblonben]

Think it is very interesting about those having supposedly MDS problems. When one really does any research into the subject it invariably brings up a cam lifter problem which affects the MDS set up, NOT vice versa. But the MDS gets the blame. Even non-MDS has had some similar cam/lifter problems. Do not know about eh Chev comment passed earlier. Bu talked with the head service mechanic here locally at the Chev dealer and he tells me about the same story as the Mopar folks relate to; I>E> wrong weight oil, old oil, tinkeritis by the owner, he did not say anything about cam flat spots though. Wonder????

 

[OCDTech]

It's tempting to do that. [emoji1787] There's lots of words being written but no facts whatsoever. Think I'm gonna block this guy too, I don't see any thing productive coming out of him on this forum except disturbing others.

Bhhhhhaaaahhaa.


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[boblonben]

Also interesting that some do not wish to learn from the exchange with others and seem to especially like only those who have to agree with them. Sign of our times I guess. You learn by being exposed to AL possibilities on any given subject and wading thru facts, truths, non-truths, etc. . On this subject if you go to an service department they tell you what they deal with on the subject, well some will, some will not, depends if they know you or not. Have found even at the dealerships and major repair places the breadth of stories about repairs and results are all over the map. So, do what you believe you 'know' to be the best but don't knock someone who may know as much or more. cheers

 

[boblonben]

Bhhhhhaaaahhaa.


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Not sure what 'facts y are looking for??? No one here s real 'facts' just written word. Some do research thru local dealers and major repair places, some do not they just post opinion. Even between engineers you will not always get a com answer, oh well. enjoy.

 

[OCDTech]

Im just having fun with all this. Is he a bot? Just attacks all our quotes and will not calmly chat back and forth,further evidence of his “trollness”


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[RVGuy]

I love the MDS, even with a Carven Comp exhaust I can barely tell its activating, and saving me some gas.
This video pretty much explains the lifter issue: I'm just hoping my 2019 Classic doesn't have those crappy budget lifters in it!

Interesting video, doesn't really explain why they think it's happening but good information nonetheless.
I'm starting to think it's from the engine running too low rpm whether from high idle times or from constantly driving at slow speeds in overdrive.

 

[Brandon-w]

Not sure what 'facts y are looking for??? No one here s real 'facts' just written word. Some do research thru local dealers and major repair places, some do not they just post opinion. Even between engineers you will not always get a com answer, oh well. enjoy.

I'm sorry but I am/was a tech.. I just did a cam and lifters... So basically going to a service manager you're essentially getting the same answers as a tech would give you because a svc manager is NOT on the floor and does not pull wrenches. He listens to his guys and takes their findings to the customers. He's a glorified customerservice Rep. And I want facts. If you disagree with someone's comment don't say "no" and neener neener them. Educate them!! Otherwise you look like some know it all ass behind a desk. No offense but at your age you should be sharing your knowledge (if applicable to the situation) instead of just saying wrong and continuing to test the patience of others by continuing to comment disagreements vs facts. You're probly a nice guy but you are coming off the wrong way. Not sure if intended or not but explaining what and why the system is wrong is failing and what's at fault is a better place to start. Not all these failures are the same but mine was 100% mds failure.

 

[boblonben]

Have first hand, person experience with 11 trucks with MDS issues. Range from 2009 thru 2017 models, all 5.7L. Also two Chargers with the set up. So 13 total. 5 were problem with using the incorrect oil !! Aggravating the most was three had had oil changes at a dealer (two at same dealer) and THEY put the wrong oil in. After two oil changes with the correct oil the MDS problem went away and not returned with a total of over 43K miles between them. Three (two trucks, one Charger) had flat spots on the cam, and one or more bad lifters). Interesting was the Charger fella had been adding a zinc substitute to help 'from having cam related problems - like what was done in the past on old style cam/lifter set, especially in the 60's and 70's. Not sure then why he had the problem he did, hummm. Two had an intermittent problem with MDS, but seemed to clear with no return to the problem, both using correct oil, no other indicator as to what or why. One had a major engine failure as oil pump went out, had been running low oil pressure for who knows long. Two had major oil leaks which allowed the motor to run low on oil. Sometimes you can only relate to those things you have direct contact with to deal with some have more, many more have less. Have a great New Year, and NO MDS problems.

 

[Brandon-w]

Have first hand, person experience with 11 trucks with MDS issues. Range from 2009 thru 2017 models, all 5.7L. Also two Chargers with the set up. So 13 total. 5 were problem with using the incorrect oil !! Aggravating the most was three had had oil changes at a dealer (two at same dealer) and THEY put the wrong oil in. After two oil changes with the correct oil the MDS problem went away and not returned with a total of over 43K miles between them. Three (two trucks, one Charger) had flat spots on the cam, and one or more bad lifters). Interesting was the Charger fella had been adding a zinc substitute to help 'from having cam related problems - like what was done in the past on old style cam/lifter set, especially in the 60's and 70's. Not sure then why he had the problem he did, hummm. Two had an intermittent problem with MDS, but seemed to clear with no return to the problem, both using correct oil, no other indicator as to what or why. One had a major engine failure as oil pump went out, had been running low oil pressure for who knows long. Two had major oil leaks which allowed the motor to run low on oil. Sometimes you can only relate to those things you have direct contact with to deal with some have more, many more have less. Have a great New Year, and NO MDS problems.

Thank you!

 

[boblonben]

I'm sorry but I am/was a tech.. I just did a cam and lifters... So basically going to a service manager you're essentially getting the same answers as a tech would give you because a svc manager is NOT on the floor and does not pull wrenches. He listens to his guys and takes their findings to the customers. He's a glorified customerservice Rep. And I want facts. If you disagree with someone's comment don't say "no" and neener neener them. Educate them!! Otherwise you look like some know it all ass behind a desk. No offense but at your age you should be sharing your knowledge (if applicable to the situation) instead of just saying wrong and continuing to test the patience of others by continuing to comment disagreements vs facts. You're probly a nice guy but you are coming off the wrong way. Not sure if intended or not but explaining what and why the system is wrong is failing and what's at fault is a better place to start. Not all these failures are the same but mine was 100% mds failure.

Actually do not talk so much with just the service manger but the mechanics mostly as I know several at multiple dealerships - Mopar, Chev, and Ford. Although I don't do as much now as I used to. Like to learn about what is really happening ion the service bays with stuff. That is how you learn things.

 

[rcgod]

I have read many posts about this issue, but what’s the fix? Hellcat lifters? Are there any other lifter options? My 2014 with 56k miles is getting pretty noisy when up to temp, so I suspect this is happening to my engine. I want to fix it myself, so I’m thinking non-mds lifters and cam, and turning off mds with my tuner. I’ll probably just stick with a stock 5.7 non-mds cam from a 2500.

 

[Brandon-w]

I have read many posts about this issue, but what’s the fix? Hellcat lifters? Are there any other lifter options? My 2014 with 56k miles is getting pretty noisy when up to temp, so I suspect this is happening to my engine. I want to fix it myself, so I’m thinking non-mds lifters and cam, and turning off mds with my tuner. I’ll probably just stick with a stock 5.7 non-mds cam from a 2500.

Texas speed makes non mds lifters for our hemis. They're cams are pretty good too from what I've heard.

 

[Wild one]

Little tip for anybody doing a compression test on their truck,other then leave one plug in each hole and follow Brandons tip about a wet/dry test,is pull the starter relay in the fuse box under the hood and use a #12 jumper wire across the main pins #30 and #87.Saves unhooking injectors etc.and you can do the test yourself usually.Leave the key off if you do it this way,and it doesn't hurt to have a battery charger hooked up to help keep the battery charged during the test.

 

[turboguard]

Interesting video, doesn't really explain why they think it's happening but good information nonetheless.
I'm starting to think it's from the engine running too low rpm whether from high idle times or from constantly driving at slow speeds in overdrive.

From what I gather from his video series, the roller bearings in the lifters are failing, causing a lot of slop and eventually wearing down the lobes. Has nothing to do with MDS, and more to do with cheap crappy bearings (passing the saving onto yoooouuuu!)

 

[RVGuy]

From what I gather from his video series, the roller bearings in the lifters are failing, causing a lot of slop and eventually wearing down the lobes. Has nothing to do with MDS, and more to do with cheap crappy bearings (passing the saving onto yoooouuuu!)

Yes but why do some people get 300k+ no issues, and others only get to 70k. Is there a condition that causes more wear than others? Maybe idling not allowing oil to reach proper locations in the engine causing the needle bearings to seize (purely a guess I know next to nothing about vehicle engines, I work on generators). A lack of fluid film on the cam at low rpm causing metal on metal?

If it were faulty or low quality parts I'd expect they'd all fail at similar points, but people are getting over 3x as far as others which makes me think there's a way to prolong the life of these parts.

 

[OCDTech]

Yes but why do some people get 300k+ no issues, and others only get to 70k. Is there a condition that causes more wear than others? Maybe idling not allowing oil to reach proper locations in the engine causing the needle bearings to seize (purely a guess I know next to nothing about vehicle engines, I work on generators). A lack of fluid film on the cam at low rpm causing metal on metal?

If it were faulty or low quality parts I'd expect they'd all fail at similar points, but people are getting over 3x as far as others which makes me think there's a way to prolong the life of these parts.

Well said. Its what im doing nerdy as it may be. Minimizing my idles, trying different oil. Not cranking without going a few miles down the road. Ill do anything if i think it will help my chances of lengthening the engine life. These things dont bother me.


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[Brandon-w]

I'm looking into making an oil filter relocate and running a much larger filter with a bypass element built into it as well. Get the fines filtered out of it and it should help just that much more.

 

[RVGuy]

If there were a way to keep the oil from bleeding down from the top of the engine when it's not running I think that'd probably make a huge difference too.

 

[Brandon-w]

If there were a way to keep the oil from bleeding down from the top of the engine when it's not running I think that'd probably make a huge difference too.

I was thinking that too. A check would work fine I think.