Keep expectations real. I heard a rumor this powertrain will be close to $18k (could be a rough estimate), add labor and an install kit and your talking $30k to get it in a JK. Hope I'm wrong. This is more than a LS3 or 6.4 Hemi.
In stock trim the 4x4 GC Pentstar is rated at 24 mpg and the 3.0 diesel at 28 mpg. Factor in the cost of diesel fuel and there is not much fuel savings. The Pentstar has 290 HP vs the diesel's 240 and costs a lot less to purchase which should be factored into value for money. Modern 8 and 9 speed transmissions allow smaller engines to run more effectively in their power bands.
Fact is modern petrol engines have got much better and diesel's have been chocked down with emissions equipment which adds greatly to the cost of the vehicle and maintenance. I think the 3.0 VM would be in the mid 30's mpg if set free.
Also consider the availability of diesel fuel if you live or travel far from an Interstate; unlike Europe diesel is not as prolific in the US and can cost 20% more than petrol.
That being said I think a diesel JK would be great. I have high hopes for the GM baby Duramax if is ever released, since tuning will be easy and GM will produce large numbers of them driving the cost down. Plus it should have some level of interchangeability with the LS if used in the 1/2 ton trucks.
So to make sense in a JK the diesel engine must be affordable, tuneable, lightweight construction, have power on par with the petrol engine(I have customers in Europe and Australia disappointed with the 2.8 crd performance and cooling), and offer efficiencies over the petrol engine when it comes to range and cost of operation.
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I agree with the above. Why?
Well currently my VM 2.8 Common Rail Diesel (CRD)
stays with the engine block blown apart. Hope in August I will get the answer to this.
Everything started with a clocking sound coming from the engine (initially I thought the injector is faulty again) for a couple of minutes, no dash indicator (oil, engine sign, etc) went on and than after 5 minutes the engine blows. Blue smoke and I had to get down to recover from the road some parts of the JK's engine block and other parts blown away. However, we were lucky to be on an asphalt highway driving about 80 km/h; steering was lost and I merely was able to control the JK outside the road to wait for the platform to winch it up. With 1000 km before this incident I just had the maintenance done (fluids change, etc etc).
Anyway until now as sole owner of a JKU with a 2009 VM CRD, mild off-road, 33" tires, 3:73, and I can say after 178.000 km on the odometers (done exclusively by me) the following:
- 2.8 CRD VM are not a reliable option in terms of cooling: currently if outside temperatures are above 25C I can NOT drive the JKU above 130 km/h assuming a 2700 rot/min (33" and 3:73 gear ratio); above 130 km/h the temperature indicator on the dash goes beyond 90C; I monitored via the OBDIII the engine parameters several times and this is a construction problem and not something else;
to this it seems I found a solution: pairing a special adapter kit for a HD electric SPAL fan engine with higher output power which allows on high circuit to cool better the engine (will see if this will work after repairing the engine
- 2.8 CRD VM are not reliable option in terms of injectors: currently I had to replace injectors twice assuming I used only best diesel on the market and there is no need4speed in terms of my JK; BOSCH injectors are crappy and this was also confirmed by the folks which are refurbishing these injectors (to sensible to current diesel norms); new Bosch injectors are pricey (not refurbished) about 800-1000 EURO/pcs.
To all the above add the DPF (Diesel particulate filter), EGR (the infamous I know) and other complications requested by the European norms for a diesel.
There were also other smaller issues with this VM (turbo hoses blown before 80.000, popping out from the 3rd gear sometimes, etc) but which I consider minor things against the above two major and serious issues with these VMs.
Every 10.000 km this engine was receiving by the book maintenance including original parts and and best quality filters every time.
Anyway TRUST/RELIABILITY are away in my case when it comes to VM paired with a JK.
The electronic is killing unfortunately the diesels these days so my friendly advise is to stay away from VM as much possible if you want to pair them with a Jeep.
Personally I would choose by far a VW Diesel swap instead of a VM for a JK. I drove VW/Audi/Skoda (old VW PD engines or newer engines & totaling approx. > 500.000 km) and NEVER ever had "surprises" similar with this VM.