Originally Posted By: SilverSnake
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.
The MDS system uses oil under pressure. I will try and explain how it works in simple terms here( mainly because I am pretty simple myself
)...
When the computer wants to engage MDS( so actually disengage 4 cylinders )special solenoids that are located under the intake manifold( where they used to be anyway )open and allow a stream of high pressure oil to travel along special oil galleries to the lifters. The lifters have a special pin on them and also a special spring inside the lifter itself. The lifters sort of collapse when the high pressure shot of oil hits the pin. The internal spring keeps enough pressure on the pushrod so everything in the valve train stays in place BUT it doesn't allow enough lift to cause the rocker to pivot forcing the valve open. Keeps it all closed up but still all in contact. Basically that is how it works.
The MDS system is designed to work using oil under pressure and was designed to do so using a 20 weight oil. Lots of people claim oil weight does not effect the MDS system. I don't want to go down that road again and argue. IMO, Chrysler designed the MDS system using a 20 weight oil and specifically tell you in the Owner's Manual not to use other weights or damage may occur. So to me it is a no brainer to stick with a 20 weight oil.
Will other weights work fine with it? Lots of owners claim that but I just fall back on the mfg's warning. They designed and built the system so in this case I will defer to them. I never even had a notion to try and see if other weights worked in my 08 Ram 1500 that had the 5.7L and MDS frankly. 5W20 works fine in the 5.7L so there is no need to use anything else. Even if you are in an extremely hot climate you can just run synthetic.
I would also strongly advise against you using any thicker weight oils in your vehicle as it is new and under warranty. You have an engine noise issue you are unsure of so do not give the car mfg any out if it worsens and engine repairs are needed. Chrysler is a stickler for following their maintenance requirements. IF you go in with an internal engine issue the 1st thing they will do once diagnosing the issue, before they do any warranty work, is to verify proper maintenance was performed and specifically oil changes.
They will see if the work was done at the dealer 1st. If the dealer has records of the correct # of OC's for your mileage/age of vehicle that takes care of it. If not they will require proof of OC's from you. They will want receipts showing what was done at an indy shop OR that you purchased enough oil and filters to cover your mileage/vehicle age. They will also check your receipts to make sure you used the right oil( 5W20, API Certified w/ Starburst, meets Chrysler MS6395 )and filter( by application ). If you can't provide the documentation they want you are SOL barring winning a long legal battle.
Even if it is a hard part failure( failed lifter or bent valve for instance ), and not the fault of the oil used, if you didn't do proper maintenance Chrysler( or any car mfg )will immediately jump on your failure to try and get out of fixing it. You might win in court but you will end up there to get it fixed under warranty almost for sure.
Just my opinion. I strongly urge you NOT to use anything but 5W20 that meets all of your warranty needs. Once warranty is out go ahead and run what you want. Until then, and especially with a vehicle making engine noises, do not deviate from the Owner's manual for oil weight, ratings, and change interval. Always use the correct filter by application as well( in other words don't use oversized filters - get the right one, from the brand you want, for your vehicle ). Even using a non MOPAR filter, with engine noise issues, can lead to warranty hassle as Chrysler will probably blame it or at least try.
I worked dealer service before and this is the best advice I can give you in your situation. Hope it helps.