Usually white smoke will be antifreeze burning. Have you been adding any coolant latley? Or did the vehicle ever overheat? I would recommend bringing the vehicle in and we can make an inspection to determine the problem.
I'm a old school mechanics daughter. If I remember correctly, white smoke indicates your burning water or coolant. If you let it go too long, it will be COSTLY. So my best advice is go see Engine Rebuilder. They will do you good. I also deliver auto parts to them from Worldpac.
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