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The Best And Worst Years For The General Motors Vortec 5.3 Engine
In addition, the positive crankcase ventilation system (PCV) featured a faulty valve cover design ... citing Gen IV 5.3 Vortec engines. Not only could the burned engine oil foul spark plugs ...
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Vortec Heads Can Unleash The Power Of Small-Block Chevrolets
Since any knowledgeable performance engine builder will tell ... Vortecs also require center-bolt valve covers and gaskets. Photo: Jeff Smith The factory Vortec head can be quickly identified ...