MDS lifters ?

[nickpohlaandp]

Ok, so I did a search and didn't quite come up with enough info to substantiate what I would consider a good answer. I know these type of posts usually end up in the OP getting flamed by someone, but I can take it, so I'm going to ask anyway.

In regard to MDS, I've read a few horror stories of people having some major issues with the MDS lifters. I'm curious to know what others feel in regard to this. Are the failures due to abuse, bad tunes, lack of maintenance (I guess that could fall under abuse)? I'm just trying to make an educated decision on whether or not it would be worth the effort to tear the top end apart and replace the MDS lifters with non-MDS lifters.

I'd like to thank you in advance for your replies. Thanks all.

 

[Hemi450hp]

Just a bad design of the lifter. I know guys who have had them fail on bone stock and well maintained trucks, and guys have had them fail on highly modified trucks as well. This is why I recommend the non MDS lifters for the guys that are going into the motor to swap their cam out. You are already in it that far, might as well take care of this while you are in there.

 

[nickpohlaandp]

Just a bad design of the lifter. I know guys who have had them fail on bone stock and well maintained trucks, and guys have had them fail on highly modified trucks as well. This is why I recommend the non MDS lifters for the guys that are going into the motor to swap their cam out. You are already in it that far, might as well take care of this while you are in there.

Ok, but what if you're not going into the motor? Is it worth tearing it apart just to replace them?

 

[yoda]

I have had non MDS lifters fail as well as MDS lifters.
It's the needle rollers that fail, not the MDS portion of the lifter.I think its just poor parts. Personally I wouldn't worry about it unless you have a issue. Then fix it.
Chances are it will never be an issue for you.

 

[nickpohlaandp]

I have had non MDS lifters fail as well as MDS lifters.
It's the needle rollers that fail, not the MDS portion of the lifter.I think its just poor parts. Personally I wouldn't worry about it unless you have a issue. Then fix it.
Chances are it will never be an issue for you.

10-4. Thanks for the input.

 

[Mossybloak]

Honest to FSM, my truck had an MDS failure at 48 miles. Repaired under warranty of course, but man that made me leery. No issues since.

 

[ladiesman217]

It's not always the roller that fails. I had one "collapse".
Truck had 56k miles. Hard miles hah.

Lifter on the right is the bad one.

 

[yoda]

It's not always the roller that fails. I had one "collapse".
Truck had 56k miles. Hard miles hah.

Lifter on the right is the bad one.

Interesting was it a mds lifter? did it damage the camshaft?

 

[ladiesman217]

Idk if it was a mds or non mds. But it was for cyl #7.
Cam shaft was unharmed, but I replaced it while I was already that deep into the motor.

 

[Broke pilot]

On my 2010 I had one collapse... Wiped the exhaust lobe. Complete nightmare to fix it...

 

[Huskerland]

Have a non MDS lifter failure on #7, part of the roller is missing, took out the camshaft lobe as well! Anybody know where a guy can get a cam that is not hi performance as this is my road office as I travel for work and want MPG over the 395 HP+. Truck has 107K and always had synthetic oil. I was amazed at how clean the valve train was after getting VC off.

 

[Ramnewbie]

Have a non MDS lifter failure on #7, part of the roller is missing, took out the camshaft lobe as well! Anybody know where a guy can get a cam that is not hi performance as this is my road office as I travel for work and want MPG over the 395 HP+. Truck has 107K and always had synthetic oil. I was amazed at how clean the valve train was after getting VC off.

Someone said that rock auto had stock Mopar marked cams. If you don't mind me asking what brand and weight oil were you running?

Sent from my XT1650 using Tapatalk

 

[meedom]

Husker I believe we would all like to know what brand, weight, and even oil filter and OCC you were using. Please respond when you can sir....

 

[meedom]

Sorry, meant to say OCI above as in oil change interval, not oil catch can...

 

[Huskerland]

Someone said that rock auto had stock Mopar marked cams. If you don't mind me asking what brand and weight oil were you running?

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AmsOil 5W20 and Wix Gold Filter. I changed oil at 10K as I followed oil life monitor

 

[69GWC]

Did you evet do a UOA on the oil running it that long ?

That OLM just runs out at 10k and has no idea what shape your oil is really in, myself I would never rely on it.

 

[yoda]

Did you evet do a UOA on the oil running it that long ?

That OLM just runs out at 10k and has no idea what shape your oil is really in, myself I would never rely on it.

I agree. But in my opinion a few failures could be oil/weight/change interval related, but the majority of failures are just poor parts.

 

[Ramnewbie]

AmsOil 5W20 and Wix Gold Filter. I changed oil at 10K as I followed oil life monitor

Which version of Amsoil? OE, XL, or SS

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[Mints]

This is one of my biggest fears of owning this damn truck. Its always in the back of my head.

 

[rwreuter]

I'd love to hear more about his oil.