My newly-rebuilt 3.8 (1960 Mk IX) sure throws out a lot of water during warm-up, and it's loaded with soot. This happened in the summer when warm-ups didn't need the starting carburetor engaged, as well as in the winter when the starting carb is absolutely required. My mechanic is pretty sure the carbs are set properly because the car idles and runs beautifully without loading up. Once the car is warm, the exhaust is nice and dry, and doesn't throw soot. But no kidding, when warming up, the amount of soot that's deposited on my driveway or garage floor is ridiculous.

Has anyone run in to this before? My '69 XJ didn't do this; my '74 EType didn't do this. Not sure what's going on with the 3.8.