Oil in the intake on my '16 Duramax... is a CCV reroute worth the hassle?

[GothamRanger]

I took my intake boot off today and it was covered in this nasty black sludge from the CCV system. I know the Duramax CCV system is designed to dump that back into the intake, but it looks so gross. For those who did the reroute, do you get much oil dripping on the driveway? That's the only thing keeping me from doing it.

 

[IronPump_Alpha]

I did the open reroute to the frame rail. If you use a long enough hose, you’ll never see a drop of oil on your driveway.

 

[WildernessLead]

Just get a catch can instead of dumping to the ground. It catches everything and you just empty it every oil change. No mess!

 

[SignalThief]

If you don't want to deal with the hassle of emptying a catch can every oil change, just grab an open reroute kit that vents to the frame rail. I ran one on my last truck for 80k miles—zero issues, zero oil in the intake, and the driveway stayed bone dry because I used a long enough hose to let it drip way back near the rear axle. It’s a 15-minute install if you get a kit with the factory quick-connect fittings. Save yourself the headache of future intake cleaning and just vent it to the atmosphere.

 

[AlpineDrifter]

Honestly, the peace of mind is worth a couple of spots on the driveway. After I did the reroute, my turbo vanes stayed clean and the truck felt a bit more responsive because it wasn't 'choking' on its own oil vapor. Just use a high-quality oil-resistant hose, not the cheap stuff from the hardware store that will crack in the heat.

 

[HeavyHauler]

I've got a 2016 as well, and I did the reroute the second I saw that puddle of oil sitting in the mouth of my turbo. To answer your question: Yes, it will drip, but it's not a 'puddle' unless your rings are shot. On my truck, I ran a 1-inch heater hose from the PCV ports all the way back to the rear of the cab. On a cold morning, you’ll see some 'steam' (condensation) coming from under the truck, which looks a bit like a small exhaust leak, but don't let that freak you out. As for the driveway, I might get a single dime-sized drop once a week if the truck idles a lot.
If you want to keep the driveway 100% clean, do what I did: Get a re-serviceable breather filter for the end of the hose and wrap it in a custom heat-shield boot. It acts like a sponge for those tiny droplets. The trade-off is way better than letting that sludge bake onto your intercooler walls and reduce your cooling efficiency. Just do it, your turbo will thank you.