Any metal in the OCV’s?
Mobil 1 FS 0w40, RAM 1500 5.7L HEMI 6000 mi, high FE
- Thread starter tcrs_circuit
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Wonder how many of these are out there??
I guess you are lucky to have gotten this many miles out of that engine. It seems to me that if the metal was not hardened properly, it wouldn't last that long. MB had some balance shaft gears not properly hardened for about a year and a half and it showed up well below 100k. Don't buy an 06-07 Mercedes V6.
Zero. Clean as can be.
D
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No... it's chelation.
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@tcrs_circuit
Is this a MDS engine? If so, are you planning on disabling the MDS? Can it be done?
Is this a MDS engine? If so, are you planning on disabling the MDS? Can it be done?
OVERKILL
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Depends on how defective the hardening is as to how long it takes to happen. It's the same issue with the lifters (improper heat treatment/hardening) and there's quite the range on how long it takes to propagate depending on how far off from where it's supposed to be, the hardening is.
Would be interesting to know the COO of the lifters and cams from the period where this was more prevalent (which the OP's falls under). It could be China, could be Mexico...etc.
Federal Mogul used to make the roller lifters for Ford back in the 80's/90's IIRC, and those things were invincible. The offshoring and declining QC with a lot of this stuff is really depressing as manufacturers scramble to deal with it after the fact once the defects are discovered.
OVERKILL
$100 Site Donor 2021
It's a manufacturing defect (improper hardening).
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Yes, it does require a tune (HP) but it can be done, and this is the perfect time for the OP to do that.
Yes it’s easy, these are non MDS lifters going in so I will disable it in HP tuners
You should have a fine running truck, when you’re done.
I hope you don’t have emissions testing in your area. Any tune will result in a CVN change and it will be detected during the inspection; in CA that is an automatic fail.
Between this and the fact that going to non-MDS lifters doesn’t materially improve reliability, I personally don’t see the point.
You just flash back to stock for the test. They aren't failing you as long as the tune isn't on at time of inspection.
Assuming your car will correctly, long enough for the monitors to set on the stock tune…sure.
Well aware of this.
You can’t use the MDS lifters with the camshaft I selected (comp 224/234.)
Yea almost zero chance this is lubrication related. This likely would have happened no matter the brand or weight used.
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Maybe I'm missing something; but MDS is probably never active when a test is in progress, because at idle MDS never activates and under any kind of a load the engine needs 8 cylinders anyway.
The "tune" doesn't have to be related to power, you can just use the software to turn off MDS and leave everything else untouched (as far as I know anyway).
When the ECM calibration is changed in any way, the CVN will change. This will be detected during emissions inspection.
Most emission testing is just plugging into the OBD port now. Needs to see all monitors complete.
Diablosport intune i3 tunes are actually carb certified, so the change in CVN will likely pass if you shut off MDS and MDS only in hp tuners. It isn’t a fail if the CVN doesn’t match factory config, it’s a fail if the CVN doesn’t a state approved CVN.
Obviously, a cam will require more tuning than just this. A lot more.
Will the truck run on the stock tune with this cam? Probably. Will it run well and not set VVT codes? Not likely.
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