A car blows blue smoke usually when it is burning oil most of the time it is a burnt valve. Which requires pulling the head and machining it followed by reseeding the valve.
===answer== blue smoke is caused by oil burning more likely to be worn out valve stem seals than a burnt valve if valve is burnt, you will get backfiring in engine seals just allow oil to run down valve stems into combustion chamber a good mechanic will have a special tool to hold valves in posotion with out removing the heads a lot less costly than removing heads
If the turbo is intercooled it may have a blown seal allowing coolant to pass into the intake flow.
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White smoke is usually an indication of a blown head gasket. Stop driving the car immediately until this is looked into. Serious engine damage will occur if th head gasket is blown.
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if is not the head gasket you are in for a cracked block or cylinder head $$$$$$
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A blown seal in the turbo is a possibility.
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you could just be running to lean
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i blew white smoke when i used racing octane gas. also when i used octane booster of fuel injector cleaners. if it is consistent, probably head gasket.
