Smoking motor

Perform a compression or cylinder leak down test you may have some frozen piston rings,although white smoke usually means the engine is leaking coolant into the combustion chamber, is it using coolant? How does it run? If the converter is still working it won't for long, if it plugs it'll be expensive, is it using oil?

sounds exactly like a blown head gasket

Yes the car is still using oil as far as I can tell and the car is still driving smooth despite the smoke, sorry about the late reply. What is the easiet way to check for a blown head gasket?

Cylinder leak down test. A special fitting is screwed into the spark plud hole, then compressed air is put intl the cylinder if air bubbles appear in the radiator that cylinder is leaking into the cooling system, if you can hear air blowing into the crankcase the piston rings in that cylinder are letting compression leak by into the engine. If the cylinder holds up he air pressure it's OK.

I'll give it a shot!

Interesting problem, let us know how it turns out, mechanics tend to get used to instant self-gratification.