How many reports of blown head gasket on Northstar motor?

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Have a 2003 Seville SLS, 98386 miles on it. Learned that a "Steel into aluminum" bolt on heads problem develops when steel bolt strips aluminum threads in head cover, causing blown head gasket and $5000. repair bill. How common is this occurrance?

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in Selinsgrove PA

Sep 15, 2022

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