For a 1998 Buick Century with a 3.1-liter engine, the torque specifications for the cylinder head bolts are typically around 65 ft-lbs (88 Nm) for the initial pass, followed by an additional 90-degree turn. The intake manifold bolts generally require around 18 ft-lbs (24 Nm) of torque. Always refer to a repair manual for the exact specifications and sequence to ensure accuracy.
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