diesel or petrol

[drover]

Yeah @jeepsgofaster , pulled that in after watching it a couple of times, god they jabber, I do knock down a cog or 2 downhill and wish for a Jake or exhaust brake at times, something the 8 speeder is more happy to do than the 5's................
The Toowoomba Bypass has a grade of about 6% or something and is like 15km so could be close but I doubt we could find a road that high up since Kosicusko is 7,000ft...............

On a convoy run with a small truck it would slow down as the day got hotter, rest of us would leave it behind, so when we got to SA we found a bit of pipe that was only about 3mm wider internal, jammed it into the air box and managed to get the air scoop back on, stayed with us after that no problem, ability to breath can make all the difference.

[SouthernComfort]

I wouldn't knock the V8's capability but just don't see what "where the diesel signs out" means either. If a direct comparison of GC's were done on exactly equal V8 & diesel models, same specs, same day, identical conditions, some proper conclusions might be drawn. All I know is it takes real discipline to hold my diesel back when I ask it to skate. The damned thing never runs out of steam, even its towing grunt is amazing. But each to their own, the main evaluation I'm interested in is what happens at the seat of my pants and the diesel does it plenty well for me.

[jeepsgofaster]

The signs out bit is more of an observation of the power spread more than a precived lack of power. CRD diesels make a lot of torque at lower rpm which makes them feel fast and accelerate very well but they hit a wall at about 3500rpm giving them an effective power spread of about 2500rpm where as the hemi is still very good down low but at 3500rpm where you expect the diesel to start flattening out is actually right where the vvt retards the cam timing and starts the hemi's top end charge to more or less 6000rpm giving it a power spread of 5000rpm and the nice side effect of that extra rpm in a motor like the hemi is more hp which is what you use overtaking and climbing steep grades at speed.

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[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