What is the size of the bolt on a crankshaft of a 3.8l in a 98 Buick regal?

The crankshaft bolt for a 3.8L engine in a 1998 Buick Regal typically has a size of 15mm. It's essential to ensure you use the correct specifications and torque settings when working with this bolt to avoid damage to the engine. Always refer to the vehicle's service manual for precise details and guidelines.