2011 Ram CTD 3500 fuel filter question

not stock, but there is a severe service option that adds an additional filter. Pretty rare as far as I know.

A second, 2~3 micron filter is an excellent addition and was stipulated by Bosch.
Glacier Diesel makes some very high quality kits to add it.

Yes, the 2018s have a primary (chassis) and secondary (engine) fuel filter/water seperator.

As far as the micron thing goes. Knowing the micron rating of the filter media is just half of the info. The rest of what you need to know is the efficiency at that micron. Generally the efficiency will increase as the micron size increases. You can have a filter that is advertised at 2 microns, but with a 98% efficiency. This means it will stop 98% of contaminants that are 2 microns. That same filter may have a 99% efficiency at 3 microns(stops 99% of contaminants that are 3 microns) and a 99.9% efficiency at 4 microns(stops 99.9% contaminants that are 4).

Some companies will advertise whatever micron their filter stops at 99% efficiency while others might advertise whatever micron is at 95% efficiency so be aware of these micron ratings and the efficiency at that rating as well.

Also, per Cummins the primary purpose of the chassis filter is NOT to filter out everything with a very low micron rating. The purpose of that filter is to filter out enough contaminates so the secondary engine filter will not get damaged and can filter out the rest. You can contact them and they will tell you exactly what micron rating and efficiency the filtration before the engine filter needs to be.

I guess my question was do the 2011s have one filter or two

They only have one filter under the hood. I believe the second filter was added to the models with DEF starting in 2013.

Ron3rd wrote:
I guess my question was do the 2011s have one filter or two

Sorry, I don't know why I got 2018's in my head. No, you only have one filter on the engine.

My son has an 2011 with one under the hood. Pre def requires 67000 or about that many miles egr cooler/ egr valve cleaning. I have heard $1200 dollar service but not sure. I did my sons for him.

The answer to your question is "No". My 2011 has one filter under the hood. I get mine off line from Ebay

southernsky wrote:
The answer to your question is "No". My 2011 has one filter under the hood. I get mine off line from Ebay

That's what I thought. My 2016 has the two filters but I thought the 2011 had one. My son in law bought the filters at the dealer for his 2011 and said they sold him two filters so he's probably was give thge later model filters.

not to add to the confusion, but the later model engine fuel filter is much better than the original fuel filter used in the before the 2013 trucks. He can use the engine filter just fine (in fact it is a superceding part I believe), only return the rear fuel filter.