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  #61  
Old 01-16-2013, 05:28 PM
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Re: Is the diesel really worth it????

According to the Jeep Australia website the CRD is quicker than the Hemi. Jeep Grand Cherokee Powertrain

I would love to buy the CRD, the thing that worries me is that many manufacturers have been having problems with Bosch high pressure fuel pumps in diesel vehicles. The damaged fuel pump sends shards of metal throughout the fuel system resulting in many (7+) thousands of dollars of damage. The cause is hypothesized by many to be the low lubricity of US diesel fuel, however bosch and the engine manufacturers have not admitted to this. You can search "Bosch HPFP" on google and read all about it. What is even more concerning is that VW has released vehicles with multiple revisions of this pump but the failures seem to continue.
I am pretty sure I read somewhere on this post that this engine uses the bosch HPFP, but am not 100% sure. Maybe someone can verify that.
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  #62  
Old 01-16-2013, 09:20 PM
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Re: Is the diesel really worth it????

at $4500 premium IMHO it is not worth it ... If you want performance get HEMI for half the price and half the headache down the road.

This is coming from a person who up until 15 minutes ago was set to get a diesel. Hoping that V6 with 8speed with have a decent reviews.
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Old 01-16-2013, 09:22 PM
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^ What he said...

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  #64  
Old 01-16-2013, 09:25 PM
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Re: Is the diesel really worth it????

I think the v6 with 8 speed will be adequate. It got good reviews in the ram, and the V6 Touareg and ML350 which have similar specs both do 0-60 in about 7.5 seconds.
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Old 01-16-2013, 11:50 PM
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Re: Is the diesel really worth it????

Well, now that the diesel is off my list, I'll give the pentastar a honest look but if I'm shopping gas v6 SUVs; there is a lot to choose from. The hemi is just plain too thirsty.

Either that or wait for more diesels to show up in the US market.

I wish Chrysler the best of luck hitting their CAFE targets.
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Old 01-17-2013, 12:08 AM
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Re: Is the diesel really worth it????

Particularly now that the 4x2 is no longer a "Light Truck". May be all 4x4 soon.
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Old 01-17-2013, 02:59 PM
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Re: Is the diesel really worth it????

Hi All,

Have not seen talk or information on here about Bio-Diesel? Is the new Jeep Diesel Bio rated or have they not gone there yet?
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Old 01-17-2013, 03:05 PM
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Re: Is the diesel really worth it????

Quote:
Originally Posted by Vern748 View Post
Hi All,

Have not seen talk or information on here about Bio-Diesel? Is the new Jeep Diesel Bio rated or have they not gone there yet?
B5.

If you go higher, you will need to monitor your engine oil levels like a hawk as the Bio does not combust at the same temps as normal diesel, so the post ignition injection they use to help clear the DPF doesn't work with high B content fuels.

The result is, it will make its way into your engine oil.

Too much engine oil = Hydro Lock.
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  #69  
Old 01-17-2013, 05:20 PM
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Re: Is the diesel really worth it????

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Originally Posted by Temerarius View Post
B5.

If you go higher, you will need to monitor your engine oil levels like a hawk as the Bio does not combust at the same temps as normal diesel, so the post ignition injection they use to help clear the DPF doesn't work with high B content fuels.

The result is, it will make its way into your engine oil.

Too much engine oil = Hydro Lock.
I always thought the issue was with the fuel pump with regard to higher bio blends, lubricity of the fuel, or at least that is the general understanding with respect to the VW TDI crowd.
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Old 01-17-2013, 06:18 PM
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Re: Is the diesel really worth it????

Biodiesel has better lubricity than regular USLD, so it will help you in that respect. The problem is that it adds more particulate matter to the DPF leading to decreased life of that component. The DPF uses a lot of expensive metals such as palladium and platinum as catalysts so this would not be good. There are ways to remove the DPF, but you would be running afoul of emissions standards.
Diesel engines in theory are a great idea, but all these emission controls make the engines very expensive to buy and to maintain/fix.
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Old 01-17-2013, 07:58 PM
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Re: Is the diesel really worth it????

That makes perfect sense, so much for my plans of brewing up a batch using Krispy creme fryer oil and the circling the cop shop...

I'm hoping that the aftermarket will respond to the DPF replacement need for passenger vehicles over time, I hear there are replacement core services available available for commercial vehicles.
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Old 01-17-2013, 08:45 PM
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Re: Is the diesel really worth it????

Here ya go... this will give you the break down on why Bio in this rig would be a bad idea:

2007+ Diesel Emissions & Biodiesel; Not All That Rosy | Utah Biodiesel Supply Blog

I believe folks have indeed confirmed that there is a post ignition injection used in this engine (though, I'm not 100% certain where the inject is occuring, if it is in the cylinder itself or further down the exhaust system.

Maybe Scott or Milous know an Engineer at CryFi that can answer.

But, in the mean time, I'd not advise anything higher then B5 (as they note in the PDF).

The other option is DPF delete, but.. yeah.. that has all kinds of other issues around it (namely, your vehicle is no longer street legal, and tampering with your emissions controls system can get you in deep poo).
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