Update: 5,000 miles, this catch can did not work for my application. The following is informational only
Last week I found oil in the inlet of my turbo and also in the intake piping. The oil was coming from the PCV breather on the valve cover.
After hearing the term catch can on here and texting those pics to a few friends, I researched a bit and learned a little more about using a catch can to deal with this oil in the intake. I wanted to avoid oil in my intake, turbo and intercooler and don't mind modifying my truck. I've seen pictures online of sludged up intakes and my brother was a Volvo/ euro car mechanic and he said he has pulled the intercooler hose off of a VW and damn near a quart of oil came out.
A catch can is a simple thing I could try that's totally reversible if it does nothing. I can just yank it and put the stock hose back on.
Anyway, during my research I found Mighty Mouse solutions, and turns out, he's made a catch can setup for a 2.8L duramax before. He had plenty of pics of his test vehicle on his website in the install gallery. Also, Mighty Mouse is the only catch can company out there that I found that is selling their kits in the 3/4" hose flavor. Never downsize your pcv.
I emailed the company, and I spoke to the owner. That's a huge selling point to me. He emailed back quickly and was helpful. I placed my order and it was shipped same day. Physically in USPS hands and on its way same day, not a ghost tracking number with intent to ship.
On to the kit itself.
Quality: The can is well made and of high quality materials. The can is either powder coated or anodized and is tough to scratch. The threads are flawless and every connection is o-ringed. There is a sight glass and a drain cock. The fittings I chose are -12an (3/4") and they're quite pretty. You can choose different angle fittings.
Function: the top breather has a simple, yet effective check valve. Under suction, the system is sealed and under pressure, it opens. The can "filters" in three ways. There is a drip ledge, and then there is a stainless steel filter mesh, and then a 100 micron exit, which ends up filtering to 90% efficiency, according to Mighty Mouse. To me, it looks like it will at least help since the oil has to go uphill through a maze to make its way to the intake tube.
On to install. I went with the bracket that they used on their test vehicle. I went with the larger can because of the sightglass and increased capacity. This made my install only very slightly different that's their test vehicle.
The simplest mounting solution, which is what they offer, is to hang the can off of one of the lid bolts for the air box. This works fine and puts the catch can in a great location physically. I think the large can is a little heavy to be hanging off of that bolt, and I will also be switching to an s&b intake system in the near future. For these reasons I will be fabbing up a bracket after I get the new intake and see what the clearances are like.
After you mount the can, the rest is simple. Remove the stock breather hose. I chose not to cut it, and saved it. Hook up the dirty side and clean side, reconnect stuff and clean up your work.
Initial thoughts are somewhat useless, since I won't know how well it works for a while. But, I've noticed at hot idle there is a gentle puffing of "smoke" from the breather. You can see this same puff of smoke if you remove the oil cap. I am assuming this is by design to vent off blow by.
I will report back if I find any oil in my catch can, or any oil in my turbo inlet. For now, it'll just hang out there.