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    Vortec Head 5.0 vs 5.7 question

    Can someone help me understand an issue Im having with cylinder head options. My boat is listed as having a 97 5.7LX which has vortec cylinder heads. Last year I bought this boat with a blown engine. Removed the cylinder heads and they looked clean and in good shape with casting numbers...
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    Air in cooling system, any ideas?

    I am dealing with an interesting air in the cooling problem. garden hose directly connected to water intake hose with a clear vinyl bubble and i can see no air bubbles are going into the engine. I have 2 pieces of clear tubing on the exhaust houses as well. At idle no air bubbles are present, at...
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