Coalescing Filter: Where is it?

[Sixpack98]

Chef Guy,
Our '06 Endeavor has the Meritor Wabco System Saver 1200 and oil coalescing is integrated into the desiccant filter and a separate coalescing element is not needed. The Meritor filter cartridge can be crossed to a Paccar AD-SP which is much cheaper available at Kenworth and Peterbilt dealers. Found one on sale for $39 at the local Peterbilt dealer. The Meritor is almost double.

mark

[Sixpack98]

Originally Posted by Robin_M

Sacs and Chef Guy,

I don't believe that older chassis (before 2008) would have a coalescing filter on the engine for the crankcase ventilation system. I believe that filters like the Racor pictured above are part of the "new emission standards" systems that diesel engines now have to have. I may be wrong about that.

Rob,
Before the latest EPA emissions, which mandated closed crankcase ventilation, Cummins did install their Enviroguard on '05 (maybe '04 as well) and above engines. My '06 ISA has the Enviroguard which is a open loop crankcase ventilation which has a oil coalescing element and returns oil back to the crankcase. Before I knew this I installed a coalescing tank on the crankcase vent tube and have never seen a drop of oil in it.

here is a link to the Cummins pdf for the Enviroguard. Your '07 probably has this as well. It sits on top of the valve cover.

http://www.cumminsfiltration.com/pdf...LI33046-GB.pdf

mark

[Robin_M]

Originally Posted by Sixpack98

Chef Guy,
Our '06 Endeavor has the Meritor Wabco System Saver 1200 and oil coalescing is integrated into the desiccant filter and a separate coalescing element is not needed.

Hmm. Mine should be set up that way too, then. That explains why I've never read anything about changing the coalescing filter in any of my manuals that came with the Dip. I'm going to have to crawl under there and see if I can read a name on the side of the air dryer.

[Robin_M]

Originally Posted by Sixpack98

Rob,
My '06 ISA has the Enviroguard which is a open loop crankcase ventilation which has a oil coalescing element and returns oil back to the crankcase. Before I knew this I installed a coalescing tank on the crankcase vent tube and have never seen a drop of oil in it.

here is a link to the Cummins pdf for the Enviroguard. Your '07 probably has this as well. It sits on top of the valve cover.

Mark,

I didn't know that, but come to think of it, I've never seen any oil residue building up on the undercarage around the back of the coach. The "slobber tube" on my old coach with a Cummins ISB made an awful mess, until I extended the tube almost down to the road.

I'm going to look for that crankcase ventilation gadget. If it sits on top of the valve cover, I ought to be able to easily see it through the bedroom hatch, right?

[Sixpack98]

Originally Posted by Robin_M

Mark,

I didn't know that, but come to think of it, I've never seen any oil residue building up on the undercarage around the back of the coach. The "slobber tube" on my old coach with a Cummins ISB made an awful mess, until I extended the tube almost down to the road.

I'm going to look for that crankcase ventilation gadget. If it sits on top of the valve cover, I ought to be able to easily see it through the bedroom hatch, right?

Rob,
Yes, you will be able to see it through the bedroom hatch. It sit on top of the rocker panel at the back (toward front of coach) of the engine. Has a couple of tubes running to it and it says "Enviroguard"

mark

[pipedream2]

Robin and Rex are right on
I have a 1999 Monaco Exec. and yes there is a coalescent filter inside the Pure Air Plus air dryer spin on descant filter..I know....i have changed them