Originally Posted By: Clevy
Originally Posted By: SilverSnake
Originally Posted By: Clevy
K. Whatever man. We've had hemi trucks in our family since 04,and currently there is an 08,a 2010,a2012 and a 2014 in our familial stable,in ram trucks and an 06 rt charger so I do have quite a bit of experience with the 5.7l engine and its capabilities over many hundreds of thousands of miles.
If it does clatter then get out and blow it up so warranty will replace it,otherwise you'll be stuck with a clattery engine for 350000 miles or til you sell it.
My dads 2014 was noisy when new but it was purchased last February so winter was in full effect.
Anyways it's been my experience that noisy or not the hemi is a very long lasting reliable engine,but get whatever concerns you have documented by the dealer just in case.
We've never had an engine problem in any of our hemi engines. The front ends though seem to need complete replacement at or around 200000 miles.
Clevy: I appreciate your inputs and experience. I have no doubt that the 5.7L Hemi is strong and durable. However, I have never had an engine of any kind (and I have owned over 80 vehicles in my life)clatter on start up. My 2014 Ram with the 5.7L does not make a sound on start up (at least not a clattering sound)no matter how long it sits. I want to fix it if on the Challenger if I can. If not, then I will live with it or trade it. I was hoping it might be an oil issue since the factory fill is not full synthetic. Thus the reason for this thread.
Fair enough.
Originally Posted By: SilverSnake
Originally Posted By: wemay
I doubt this is a syn v conv or xw20 v xw30 issue. I'm with Clevy here. But seeing that this is troubling you (understandably so) if anything, start with the filter. Of coarse, we all know that without the ability to hear it, these recommendations hold very little merit unless it were a common issue discussed on various boards. Have you visited any HEMI/Dodge/Mopar Forums?
Agree that I will start with the filter. I will also switch to a full synthetic at the same time. According to multiple sources, switching to a heavier weight oil is not an option. Using anything but 5W-20 will cause problems with the MDS. I also belong to 2 Challenger forums as well. Some of the members swear that changing to a full synthetic (Redline was one example) cured the problem. Others claim that a full synthetic oil made the problem worse. So far, I have discovered no consensus on this issue.
Whoa.
K. Mds and vvt are unaffected by using a thicker grade of oil. I currently have a 0w-40 in my charger,and have been using 40 grades in it for the summer since I acquired it and MDS isn't affected,nor is vvt.
Think about it. An Xw-20 cold is way thicker than an Xw-40 hot,yet the mds and vvt both work just fine when the oil is cold,so please explain.
And don't give me the dodge says so nonsense. There are many reasons dodge wants you to use a 20 grade,not that there's anything wrong with them,it's just that I hear and read all the time on how the hemi needs a 5w-20 for the systems to work which is utter nonsense.
If that were true the vehicles mds and vvt wouldn't work until the oil was up to operating temp,which in the winter can take 30 minutes.
I've proven that mds will engage as soon as I set cruise on flat highway on a cold engine and oil.
And just to be clear my chargers fuel economy is unaffected whether using a 20 grade or a thicker 40 grade. Both grades net me the same fuel consumtion on the highway,and I got my best highway mileage of 31mpg using a 0w-40.
So if I'm capable of getting that kind of mileage and mds isn't working then just imagine what a 20 grade will do.
That whole nonsense of "requiring" a 5w-20 or the mds won't work is nothing more than a scare tactic. All engines are built to run a range of viscosities,not just 1.
Anyway getting back to the 5w-20 grade my 04 got totalled at 280k. It got dealer oil changes every 5000 miles using conventional oil and that truck ran stellar,and didn't consume a drop of oil between changes. So I'm not knocking the 20 grades whatsoever. I've seen many modular ford engines and hemi engines get stratospheric type mileages from the engines using 20 grades all their service lives,I'm just clarifying that a hemi doesn't require a 20 grade for the systems to work.
If that were true the engine would be inoperable until up to operating temp which we know isn't the case.
Truth be told if it is valvetrain then try a can of liqui-moly mos2. I've used it in every engine I've owned for many years.
Maybe that's why none of mine tick.
Up until a couple of weeks ago, I did not know anything about the MDS (still do not know much). Actually the dealer never said anything about oil weight and the MDS. I got that from a lot of posts on various forums. Interesting that you are the first that said oil weight has no impact on the MDS (which would be good news). I saw one technical post that did a pretty good job of explaining the situation. I will try to see if I can find it again.
Tell me more about liquid-moly mos2.