Pioneer Automotive Industries Engine Cylinder Head Bolt Set P/N:S-173-A

Keep the cylinder head clamped tight and the head gasket sealing with the Pioneer Automotive Industries Engine Cylinder Head Bolt Set (P/N S-173-A). This set installs as a direct-fit replacement across a wide list of 1980s GM cars, including the 1982-1986 Buick Century, 1980-1985 Buick Skylark, 1982-1989 Chevrolet Camaro, 1982-1989 Chevrolet Celebrity, 1985-1989 Chevrolet Cavalier, 1986-1989 Oldsmobile Cutlass Ciera, 1985-1989 Pontiac 6000 and more — see the Buyer's Guide tab for the full application list.

• Head-to-block clamping: the bolts fasten the cylinder head to the engine block, applying the clamp load that compresses the head gasket to seal combustion, coolant, and oil passages.
• Sold as a set: supplied together to replace the head bolts for the covered engine during head gasket or top-end service.
• Application-specific: matched to the listed vehicles so it drops in for the covered applications.

Cylinder head bolts are a wear item during any head gasket job. If leaking coolant or oil at the head, combustion gases in the cooling system, or overheating trace back to a compromised head gasket, replacing the bolts along with the gasket is part of a proper repair — diagnose the underlying cause first. Always torque to the vehicle service information's specification and sequence.

Interchange: Manufacturer part number S-173-A (also S173A).