White smoke coming from exhaust is coolant, it is usually the head or the intake manifold (at least I think the 4 cylinder has a coolant passage or two in the intake).
In any case, perform a cooling system test to isolate the leak, could also be a crack in block.
If still burning coolant, remove head and check block for warpage.
Bad valve seals will cause blue smoke (oil).
It may be cheaper overall, to replace the engine with a used one.
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Thursday, March 12th, 2009 AT 12:32 AM