You were playing with "Rohda" were you? Better be careful, your wife might get jealous. One thing about Rohda, you don't have to bribe her with trinkets to get her to work.
Anyway, you didn't say how cold it was when you started the 3710 or whether it was outside or in a heated garage or shop (like mine is).
Normally, diesels will puff a little white smoke due to incomplete combustion when the cylinder (s) are cold. They tend to sound like a bucket of bolts too. thirty seconds is a little long for a pre-heated engine (glow plugs) to white smoke. You might have a problem with the injector cups leaking.
Actually, the best way to find out exactly what is going on inside is to do a spectroscopic oil analysis If you have a heavy duty truck (class 8 diesel) outlet near you, like a Freightliner, Peterbilt or Western Star dealer, stop by the store, go to the parts counter and ask the counterman for a pre-paid oil analysis kit. Caterpillar has a really good one for about $18.00 retail. Follow the enclosed directions for obtaining a sample of your drain oil, mail it off in the neat plastic bottle and the analysis company will send you a spectra-analysis of exactly what is in your oil. That way, you will have a good idea of what kinds and substances are suspended in the oil, diesel fuel and anti-freeze included. We use it to monitor all of our tractors as well as our trucks. You will be able to tell if your cups are leaking by the fuel dilution percentage. Or, if it is antifreeze for that matter. (white smoke can be antifreeze too). There will also be percentages of lead indium, brass, bronze, steel, etc. We like spectra analysis because it will tell us when it's time to roll in a set of bearings or for that matter, if a head gasket is perforated. Minute amounts of anti-freeze can't be seen in drain oil. The antifreeze has to be in a large quantity in the oil to make it milky. The same holds true for diesel. For the diesel to effect the viscosity of the oil, well, at that point, you would need a re-build pretty bad. Whatever winds up in the combustion chamber, a certain amount will get by the rings and wind up in the crankcase. The oil analysis will show that.
