Generally,
yes, head bolts should be replaced when changing head gaskets on a 2003 Chevrolet Malibu with a 6-cylinder engine. While some might argue that reusable bolts are acceptable, the significant stress placed on the head bolts during the head gasket replacement process increases the risk of stretching or weakening them. Reusing them could lead to a compromised seal and subsequent head gasket failure in the future, requiring even more extensive repairs.
The cost of replacing the head bolts is relatively small compared to the labor and potential damage caused by head gasket failure. Using new head bolts ensures proper clamping force and a reliable seal. Consult your repair manual or a qualified mechanic for specific recommendations and torque specifications, as incorrect torque can cause damage.
