Blowing white smoke after long idle

2019 Freightliner Cascadia Evo
228,000 miles

Problem: After long idle/opti idle white smoke blows in through ventilation system and out through hood vents when coming to a stop. It will persist for about 10-15 minutes then not happen again until after another long idle.

I’ve tried stopping and inspecting under the hood during this time and cannot pinpoint an origin. Smells like oil or when the truck is in the process of a regen. The engine will sound groggy but then normalize after smoke clears. I’m assuming it’s burning off excess fuel or oil accumulation during a long idle but I cannot pinpoint the origin or what is causing the buildup.

Outside of this, the truck runs perfectly. This only occurs after a long idle and I take off for the day. Any ideas on what the problem is?

Possibilities: Bad injectors, timing off, gadgets, bad turbo seals?

Note: No alerts or fault codes are popping.

 

Thank you, I’ll take a look at it and let you know.

 

So it turns out it was the bellows/flex pipe that was cracked. Found carbon tracking all along the pipe.