For a month or two my 330i has had the telltale signs of headgasket problems, it smokes a lot (white smoke), has gotten gungey under the oil cap (even a tiny bit on dipstick now) and i think has lost some coolant but don't know details on that as I don't know the level as such months ago, but regularly checking now it doesnt seem to go down much.
I have a feeling I noticed slightly more "condensation"(at the time) from the pipe after I changed the oil, don't know if this matters.
Other than the smoke and gunge, she otherwise runs fine, silky smooth.
So today I had the day off and ran a compression test. I did two while she was pretty cold (intended to be hot but by the time it was ready it was cold again) and one hot (put plugs back in, heated up, ran it again 10mins later).
Cold (two attempts averaged).
Now to me these values look pretty good, especially for a 100k car. Can it still be head gasket faults if it's holding the pressure fine? Anything else likely to give these problems? I was thinking of the ccv valve or something but the smoke is definately white -steam. It shouldn't be just that it needs a good blast to get rid of condensation as i've taken her for a couple of half hour drives for exactly this reason.
But that leads me to a next thought: Since we've been getting this fairly cold weather (0'C), she doesn't seem to be getting upto proper temperature, no where near on the guage. She does however when sitting still ticking over. Could this possibly be a botched thermostat not letting her get hot enough on the move, and thus not clearing out all the water in the exhaust? Meh sounds desperate to me. :p