C7 Blow By

[GeneralDisorder]

I have noticed over the last couple thousand miles, with the engine now fairly broken in, and with ECO hubs and stock gears I'm not getting any blowby and not losing ANY engine oil. Checked it on a level surface a couple times recently at about 2500 to 3000 miles (on the oil) and it is DEAD NUTS on the full. Has not moved a millimeter.

I think this is primarily a break-in and high RPM effect. Being farther along in break-in or reducing RPM both help it seems in my experience. Eventually leading to elimination of the issue.

Yet another example of an issue that isn't if you actually use the machine - like tire flat spots, dead batteries, and all the other trappings of trucks perpetually covered in dust and spider webs.

 

[MatthewWBailey]

i routed my breather line outside the frame as mine had made quite a mess of the plumbing and wiring inside the drivers frame rail with supposedly only 8500MI on the truck... The larger the flow the larger the surface area/volume needed to condense/settle the vapor out of the stream. it probably doesn't matter what the material is as it is not super high temp, just needs a routing that will allow it some opportunity to collect the liquid and a way to drain it off... An old A0 air dryer canister might work well with some modifications to direct the flow properly inside to make best use of the heat sync casing.

I think I would leave the cat "breather" in place on the engine as it is probably separating out some oil and keeping it in the engine, and run its output thru the "catch can"...

I'll be replacing my old dryer with the new Purest I bought. So maybe that'll work. I like the idea of the heat sink.