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What can I expect to see with a SBC that has been sitting inside a heated area for a few years? The owner said the engine has around 35K on it and the freeze plugs are rusty and need to be replaced. What is this a sign of? What usually causes freeze plugs to rust? Given the stated mileage, can I get away without a rebuild?
 

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common zinc plated soft plugs will rust through if only water has been used....

be careful here as a rusted through plug might have been a major over heat.. and cracks ensue.....
 
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