'91 GM - milk and smoke

[86VickyLX]

hmm, are there any bubbles in the coolant when the car is running?

[Rodentkiller]

Hope it is gaskets not heads or block gaskets are easy fix not cracked block or heads and good luck to ya.

[86GmLsCoupe]

Oil level doesn't seem to be changing. Nothing noticeable, at least. This engine has never been pulled apart, as far as I know. The oil is staying clear and the smoke show seems to have disappeared (just checked it again tonight). No other abnormal behavior other than the rough idle after it's warmed up.

Since the car is parked outside in an already messy parking spot, there's no real way to tell if it's an external coolant leak without poking around. I'm just going to keep a close eye on the car for now and keep driving it.

You can stick a big flat piece of cardboard under the car overnight and it might give you a better idea of whats going on. I've done that tons of times.