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Old 05-27-2016, 08:18 PM   #1
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DEF requirement in newer diesel engines

We are looking at a 2010 Itaska Meridian V 34y.

Does this engine require DEF? Can't find anything in the brochure or owners manual that mentions it.
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Old 05-27-2016, 10:42 PM   #2
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Maybe, maybe not. 2010 models was cut in for DEF needed methinks. DEF is not a blocker to purchase me me, it's not a bad thing. IMHO.
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Old 05-27-2016, 11:05 PM   #3
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2010 WAS the year of change.........

Cummins did add DEF but thought it was Fall Production on Meridian Maxum Chassis (Freightliner XCL)
Early Cummins ISC 8.3L----360 HP
Later Cummins ISC 8.3L----380 HP (SCR & DEF added)


But I thought the Meridian V Class (Frieghtliner XCS) came with
Cummins ISB 6.7L 340 HP which didn't get SCR/DEF until 2011
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Old 05-28-2016, 05:44 AM   #4
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Check and see if it has a DEF tank.
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Old 05-28-2016, 05:59 AM   #5
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Dealer says no. Owners manual online doesn't mention.

Wouldn't mind if I didn't have to manually add it. It's a 6.7.
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Old 05-28-2016, 07:07 AM   #6
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First of all, don't trust what the dealer says. They will virtually never tell a prospective sale the truth if they think it might keep them from coming in. Ask for the VIN and call the manufacturer and check. I know Fleetwood and most other mfgs can easily tell you these type of details.

As far as DEF/no DEF goes, from an openers perspective I'd prefer not having the complex anti pollution systems on modern Diesels, but I'm into my 2nd year of DPs and it's no big deal. I have a 10 gallon tank and just fill it up as required.



Quote:
Originally Posted by BoomersRock View Post
Dealer says no. Owners manual online doesn't mention.

Wouldn't mind if I didn't have to manually add it. It's a 6.7.
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Old 05-28-2016, 10:16 AM   #7
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I own a 2011 Itasca Meridian 34Y - no DEF for me. Coach was manufactured in fall of 2010 and engine in late 2009.
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Old 05-28-2016, 10:46 AM   #8
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I have a 2011 Meridian 34Y and I do have DEF. My coach was manufactured in January of 2011. Apparently, earlier production of 2011 models do not have DEF. Since you are inquiring about a 2010 model, I'm sure you don't have DEF.
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Old 05-28-2016, 10:58 AM   #9
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I think it will depend on the year of the chassis
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Old 05-28-2016, 11:05 AM   #10
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The requirements depend on the date of manufacture of the engine & chassis. There are a lot of 2010 and 2011 model year coaches built on 2009 model year chassis. They would not require DEF.
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Old 05-28-2016, 01:08 PM   #11
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Quote:
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The requirements depend on the date of manufacture of the engine & chassis. There are a lot of 2010 and 2011 model year coaches built on 2009 model year chassis. They would not require DEF.

Except........engine mfg. determines what emissions go with their engines to be EPA Compliant

Cummins.....
2010 ISB 6.7L-----no DEF
2011 ISB 6.7L......DEF
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Old 05-28-2016, 03:59 PM   #12
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I have 2010 Journey Express (same as Itasca Meridian V Class). It was manufactured in November of 2009. It has a DPF but does not use DEF. It is my understanding that the determining factor is the year the engine was manufactured. After January 1, 2010 has DEF.
My coach also has basement air conditioning (which I'm very happy with) and later units have 2 rooftop air conditioners.

PS: I'd not worry a bit about having DEF. A lot of old diesel guys denigrate it. But I've yet to hear of a problem due to DEF. After all it just goes into the DPF which is in the exhaust.
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Old 05-31-2016, 08:44 AM   #13
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Thanks all for the feedback. Gives me more info to be able to determine this.
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Old 06-01-2016, 03:44 PM   #14
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Quote:
Originally Posted by ChasA View Post
I have 2010 Journey Express (same as Itasca Meridian V Class). It was manufactured in November of 2009. It has a DPF but does not use DEF. It is my understanding that the determining factor is the year the engine was manufactured. After January 1, 2010 has DEF.
My coach also has basement air conditioning (which I'm very happy with) and later units have 2 rooftop air conditioners.

PS: I'd not worry a bit about having DEF. A lot of old diesel guys denigrate it. But I've yet to hear of a problem due to DEF. After all it just goes into the DPF which is in the exhaust.
I have a 2011 Meridian 34Y with 2 rooftop air conditioners. No DEF.
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