diesel or petrol

[bjm]

My two bobs worth own 2012 WK2 GC Overland Diesel,2010 WH GC Diesel Merc motor 610 nm with DP Chip since new .now 205000 klms,2014 JGC SRT hemi.6.4
The 2010 WH is a weapon towing .Will easily keep up and have passed V8 LCs
towing same size van for all their b……..t noise.! The WK2 is more refined with
better fuel consumption in all areas. Both great tow vehicles. Now the 6.4 hemi.!
This Gen 3 hemi motor has been around for 10 years,5.7L 6.2L 6.4L . Great motor let down by a lifter/ camshaft problem that still has not been solved.From around 60000 klms on your pocket might be relieved of around $7000.00 min to fix. Going on figures I got from major hemi performance workshops /dealers etc around 100 failures per year ,when a motor fails at such low klms there is something wrong.! All hemis have this problem. So, would I buy a petrol JGC hemi or 3.6 in the future ,hard decision , by the time I have made up my mind it will be electric,towing my Jayco 17.58 Outback ,dunno !!

[bjm]

There are numerous aftermarket cams,lifters for this engine.However even rebuilt
motors are having the same problem! Numerous theories put forwards for failures from less zinc in oils,motor design, etc etc.New crate motors,full dealer serviced
engines,all failing.Some motors may reach 150000 klms ,a few may never fail.mate had a new Ram 1500 ,5.7L , 3 years old lifters went.The simple fact is motors should not be failing so often especially when its the same components.!
I might add Stellantis FCA are well aware of this world wide problem.!

[jeepsgofaster]

Not the lifter issue again, how come the VM's breaking crank shafts don't get the same publicity.

Do gen 3 hemi's suffer cam failures, well yes. Does it commonly happen at 60 000k absolutely not.

Is it a design flaw with the engine, absolutely not. How can I be so sure?
Because the first gen 3's or wh never had this issue. Exactly the same design engine.

Can aftermarket components cure it, absolutely, there are hemi's making well in excess of 1000hp with no cam issues because it's not a design flaw.

Its becoming common knowledge the most likely causes of the issue and factory hemi parts combined with a better oil that can cure it.

MDS system may seem very complicated but in actual functionality it's quite simple, usually reliable.

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[bjm]

I am talking about bog standard hemi engines with failing lifter,camshafts.!When you pay or have paid around $90000.00 for a JGC SRT 6.4 hemi you shouldnt have to put up with premature engine lifter or camshaft failure.These failures are
kilometer related.eg from 60000 klm up.Many hemi rebuilders say Hellcat lifters
are the fix yet they have been used in all hemi engines since 2016 and are still failing.one Melbourne hemi specialist rebuilt fifty failed lifter engines last year alone,and states they have a problem.I know a Jeep dealer service manager and an independant Jeep operation who just this week had hemi engine lifter failures in their workshops.FCA have known about these failures for years yet have done
very little to solve it other than to fit lifters with larger needle rollers in 2016.I might add the 2009 on Gen3 Hemi motors had a number of changes internally including the camshaft height in block was lifted by one inch which changed lifter angles on the cam .!Maybe this is the smoking gun.?

[nitrobrent]

Dont mention the coolant pipe leak under the intake manifold

[Ed..]

Originally Posted by nitrobrent

Dont mention the coolant pipe leak under the intake manifold

I was going to get mine replaced when the dealer replaces my intake manifolds but they would have to order one in from USA, and that would take another 8 weeks or so. So I just hope mine is OK and lasts, I still have about a year left under my warranty so if mine fails I hope it will be within that time frame. I am staggered that FCA doesn't have these parts in stock locally.

[jeepsgofaster]

Originally Posted by bjm

I am talking about bog standard hemi engines with failing lifter,camshafts.!When you pay or have paid around $90000.00 for a JGC SRT 6.4 hemi you shouldnt have to put up with premature engine lifter or camshaft failure.These failures are
kilometer related.eg from 60000 klm up.Many hemi rebuilders say Hellcat lifters
are the fix yet they have been used in all hemi engines since 2016 and are still failing.one Melbourne hemi specialist rebuilt fifty failed lifter engines last year alone,and states they have a problem.I know a Jeep dealer service manager and an independant Jeep operation who just this week had hemi engine lifter failures in their workshops.FCA have known about these failures for years yet have done
very little to solve it other than to fit lifters with larger needle rollers in 2016.I might add the 2009 on Gen3 Hemi motors had a number of changes internally including the camshaft height in block was lifted by one inch which changed lifter angles on the cam .!Maybe this is the smoking gun.?

I understand your point, and in a perfect world there'd be zero issues with a $100000 performance vehicle but the reality is that you can spend more money than that on a LC have zero performance in comparison and a $14000 dpf failure right off the show room floor. LS engines eat cam shafts and lifters nobody seems to be howling that LS engines have a design flaw.

My problem with hemi lifter failure issues is the hysteria around it. Does it happen, yes. Do other manufacturers and engine types have issues of one type or another that are a lot more expensive to fix? Absolutely, so why don't they get howled at like Mopar does.

Reality is there are literally millions of these engines built by this time powering all manner of different vehicles and the ones that fail get a disporsionent amount of press.

I have had a cam lifter failure in my engine but it was at over 200 000k so not the end of the world.

AFAIK it's not true the cam position was changed. It was changed in the first gen 3's compared to the much earlier hemi's but all gen 3's have the same cam height.

IMO the problem is not there, its a lubrication failure caused by unrealistic, impractical efficiency targets and emission regulations. It's the same reason we are seeing chocked to death direct injection engine, chocked up diesel's and a multitude of CRD engine failures caused by egr's

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