Hi, all, and thanks for the input. It is probably the head gasket. The car is old and tired enough that it isn't worth spending the money on a new head if the head is cracked. I think as soon as the rain lets up I'm going to finish cleaning the mating surfaces on the head and block and torque down the head with the new gasket. Before I do all the work of putting it back together I'm going to hook up all the coolant lines and pressure test the cooling system. Hopefully it will hold pressure; if not, I can investigate further.

Max Behensky

__________________
1981 Datsun King Cab Diesel pickup
1982 240D 4 speed manual
1987 300TD wagon
1991 300D 2.5 turbo