A great way to get a cold diesel with sick glow plugs to start is with a propane torch. On most diesels if you remove the plumbing to the intake , light the torch and hold it inside for about 20-30 seconds then have someone crank at the same time it will fire right up. On the engine in our SD's it is a little hard to gain that kind of access to the intake, but you should be able to simply heat the area where the turbo attaches to the manifold. I've never had my turbo off before, but looking at the service CD there doesn't appear to be any kind of gasket or oring in there. If you want to play it safe heating the manifold further downstream will work well. It only has to heat the air a little. Diesel fuel needs to be at least 600 or so for good combustion. It will ignite as low as 450 but you'll have lots of smoke. This will clear up as the engine warms.