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Old 03-19-2016, 08:43 PM
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just bought a 2008 diesel Jeep.. What do I need to know?

Just bought the wife a 2008 Diesel JGC

I have owned a few duramaxes and I have always done my own work on them included programming them, removing DPF and EGR etc..

I am very comfortable with diesels.

That being said, what do I need to know about these Jeeps?

-fuel filter replaced x2 a year?
-Do they have a spin on transmission filter to replace x2 a year?
-stock air filter ok?
-I'm not going to chip and rip out emmisions on this Jeep since its the wife's lol.. But is there any mod's that should be done?
-I was reading it's very important to change out the timing belt on these after 100,000kms. True?

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Old 03-24-2016, 01:58 AM
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Re: just bought a 2008 diesel Jeep.. What do I need to know?

Fuel filter, once a year depending on mileage driven. Trans filter is inside pan, not external. There are timing chains on these Mercedes OM642 engines. The Libery CRDs had timing belt issues. These engine are in Sprinter vans with well over 300,000 miles. Stock air filter is okay, stick with a good brand paper filter, no not put a K&N in if you like the compressor blades on your turbo.

1. Green Diesel Engineering EcoTune ASAP
This removes any future issue of the swirl valve motor crapping out, also turns off the EGR, which is never a bad thing!

2. Look into what is called the Elephant Hose Mod, it reroutes the CCV from going back into the intake preturbo, sucking all the misted oil with it, to either atmosphere or like mine, tied into the exhaust post DPF.

If you do nothing other than general maintenance, you'll be fine. Watch what oil you use, this engine has a specific spec'ed oil due to the particulate filter. MB229.51 I believe it is. I run amsoil low saps european formula. I change my oil every 15,000 miles but my oil filter (super easy) every 5,000 miles.
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Turbo Res Delete, 171,000+ miles
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Old 03-24-2016, 07:58 AM
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Re: just bought a 2008 diesel Jeep.. What do I need to know?

Quote:
Originally Posted by ggrassmid View Post
Fuel filter, once a year depending on mileage driven. Trans filter is inside pan, not external. There are timing chains on these Mercedes OM642 engines. The Libery CRDs had timing belt issues. These engine are in Sprinter vans with well over 300,000 miles. Stock air filter is okay, stick with a good brand paper filter, no not put a K&N in if you like the compressor blades on your turbo.

1. Green Diesel Engineering EcoTune ASAP
This removes any future issue of the swirl valve motor crapping out, also turns off the EGR, which is never a bad thing!

2. Look into what is called the Elephant Hose Mod, it reroutes the CCV from going back into the intake preturbo, sucking all the misted oil with it, to either atmosphere or like mine, tied into the exhaust post DPF.

If you do nothing other than general maintenance, you'll be fine. Watch what oil you use, this engine has a specific spec'ed oil due to the particulate filter. MB229.51 I believe it is. I run amsoil low saps european formula. I change my oil every 15,000 miles but my oil filter (super easy) every 5,000 miles.
Thanks!

Who tunes these? WIth my duramaxes I paid for custom EFI live tunes. Or is the tunes for these jeeps canned tunes like you buy a pre loaded programmer? What's the best to use?

I read about the elephant mod. I'll be doing that as well.

I also use ams oil in everything. I'll be switching over all the fluids to ams shortly.

What km/miles shoudl the internal trans filter be changes?

Thanks
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Old 03-24-2016, 08:05 AM
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Re: just bought a 2008 diesel Jeep.. What do I need to know?

Green Diesel Engineering has the tune. He ships you a scanner tool, you download your stock tune, email the stock to GDE, he adjusts the peogramming, send back via email, and you load it onto Jeep. Its quick and easy!
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Old 03-25-2016, 07:49 AM
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Re: just bought a 2008 diesel Jeep.. What do I need to know?

Quote:
Originally Posted by ggrassmid View Post
Green Diesel Engineering has the tune. He ships you a scanner tool, you download your stock tune, email the stock to GDE, he adjusts the peogramming, send back via email, and you load it onto Jeep. Its quick and easy!
Has anyone had any problems with their tunes?


Do I need to remove the DPF if I get him to turn it off?


Do I need to block the EGR if he is turning it off?
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Old 04-08-2016, 11:03 AM
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Re: just bought a 2008 diesel Jeep.. What do I need to know?

Changing the oil:

Filter is inside the engine bay. Drain the oil and let stand for at least half an hour (I let it go overnight). You NEED MB229.51 spec oil. Chrysler recommends 5w30, Mercedes recommends 5w40. I use the former.

Filling the engine takes 10 liters of oil. Half of it has to go down the filter side (it goes in slow) to lubricate the bearings. The other half goes where oil normally goes. It's not too hard all said and done, just have to make sure it's been done right.

Don't forget to take the rubber seals off the filter and swap them to the new one.

There's a lot of good information I had found here: https://conflictedracer.wordpress.co...erokee-diesel/

And here: http://www.wkjeeps.com/wk_maintenance.htm

Should cover just about everything on the CRD.
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