u/Dazzling_Try_4532

Hey, I have a 2016 340i with MHD Stage 2. i been on stage 2 for 2 years now and i’m currently at 110k miles. I’ve replaced some cooling components (coolant hoses) and upgraded to an aluminum oil filter housing. I haven’t done the water pump or thermostat yet but i know that i’m at the 100k mile mark and i know those tend to go out around that mileage.

I noticed on cold starts, especially in the morning, there’s a quick puff of light smoke from the exhaust. It disappears almost immediately and doesn’t continue while driving.

I have no noticeable oil loss.

Just wanted to see if this is normal for B58s (especially tuned ones), or if I should be looking into valve seals/turbo.

Appreciate any input.