Five minutes after starting up this morning I was on a divided highway doing about 50 and plumes of white smoke started pouring out the back of the car. I had some loss of power intermittently with the plumes. Oil pressure and temp looked okay so I limped home (five to eight minute drive).

Got it in the garage and shut it down. There was coolant sprayed around the engine compartment. Oil level looked the same and I didn't see water on the dipstick. I had some pinhole leaks in the radiator before but there was water in a number of places and my radiator overflow had quite a bit of water in it. There were wisps of evaporating coolant coming off the hot parts of the motor.

What steps shall I take to diagnose this tonight? Drain the oil and look for coolant? What else might it be besides the head gasket?

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1965 190D
1980 240D