I don't know but mechanics they all have their own theories. I had my engine rebuilt and never experienced what you are describing. But hey, with mechanical stuff anything can happen. <img src="/forums/images/graemlins/smile.gif" alt="" />

Does the smoke has a distinctive smell? like a sweet candy like smell? if it does then it might be antifreeze. Have you notice any changes in your temperature? do you have a thermostat installed? My question is based in that if you have problems with the head gasket and since you don't have a thermostat you might not notice a big change in the temp. Also, have you checked the oil? have you changed the oil after the first 500 - 600 miles?

Sorry for all the questions but they might come handy in trying to isolate your concerns.

Hope is nothing serious. <img src="/forums/images/graemlins/cheers.gif" alt="" />
Javy