Ok, I know... I apologize in advance for repeating another thread on the subject.
2001 330Xi E46, Cold start is rough idle, lots of smoke and losing coolant. After 30 secs or so, idle smooths out, and smoke dissipates. Or if a little throttle is given, it smooths out as well. No coolant (seen) in oil, under cap, or dip stick. No wet spots in and around engine, or on ground. No smoke while driving, no over heating or even hot temps. Heat works too.
Last year I replaced radiator, expansion tank, a few hoses. All was good. AC wasn't working so took it to BMW for a fix, got it working and then this happened soon thereafter. (No relation of course).
180k+ got car 3 years ago, put the last 45k on it and a slew of typical maintenance work all done.
Haven't pulled plugs, or performed coolant pressurization or compression test. I wanted to get some insight before I dive in.
My thoughts are Head Gasket? I've rebuilt engines, so not a problem if that's what needs to be done. Would ask for any links pointing the way of course, lol, if that's the case.
Is my daily, so want to keep it going.
Thank you for your thoughts...