Re: 68 Z/28 Engine Smoking - Any Ideas?
If the smoke is black, I would look at the carb, while a bluish smoke would be oil related. As suggested earlier, pull all the plugs and check the color. A dry black sooty residue indicates a rich condition, possibly a carb problem. An oily black residue indicates oil passing through the Intake Valve guides or Rings. Oil passing through the Exhaust Valve Guides will cause blue smoke but may not affect the plugs. If a particular plug shows these symptoms, look to that cylinder for the problem, such as rings, valve seals, or leaking Intake Manifold Gasket. Reading the plugs is the first thing I would do.
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's
69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD
69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
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