first off, what color is the smoke? blueish or white. Are you losing any coolant?
Do a compression test, if one or more cylinders is low put a little oil in that cylinder, if compression raises it's the rings. Or you can do a leak down test but that tester is more expensive.
Do a compression test, if one or more cylinders is low put a little oil in that cylinder, if compression raises it's the rings. Or you can do a leak down test but that tester is more expensive.
