Chevy Timing Cover Bolts

The MOROSO Chevy Timing Cover Bolts (Part No. 38590) is a Grade 8 steel fastener kit engineered for small-block and big-block Chevrolet V6 and V8 engines. This 10-piece set delivers the hardened fastening solution required for secure timing cover installation, with each bolt featuring a 1/4-20 inch thread, integral serrated face washer, and zinc plating for corrosion resistance. Purpose-built for engine rebuilds, restorations, and performance upgrades where OEM fastener specifications demand superior clamping force and reliability.

Grade 8 classification indicates these bolts meet SAE J429 standards for tensile strength, delivering approximately 150,000 PSI—critical for maintaining timing cover seal integrity under engine vibration and thermal cycling. The integral serrated face washer prevents fastener rotation and backing-out, a common failure point in high-vibration engine bays. Zinc plating provides baseline corrosion protection, essential for engine compartment longevity. The 1/4-20 inch thread specification matches OEM requirements for Chevrolet V-series engines, ensuring proper fit without modification.

This kit addresses a critical pain point for engine builders and restoration shops: sourcing matched fasteners that meet both OEM geometry and Grade 8 strength ratings. Using undersized or degraded fasteners on timing covers risks oil leaks, loss of engine vacuum sealing, and potential catastrophic coolant or oil bypass. The 10-piece set covers full timing cover bolt requirements for most Chevy small-block and big-block applications, reducing the need for multiple sourcing trips.

MOROSO is recognized in the performance engine community for fastener specification accuracy and quality control. Whether performing a street rebuild, race engine assembly, or restoration on a classic Chevrolet, matching fastener grade to OEM specification prevents future sealing failures and maintains engine reliability. Stock Grade 8 fasteners in the correct thread size and washer design cannot be assumed from generic hardware suppliers.