Cloyes Engine Timing Cover

Cloyes Engine Timing Covers: Precision Engineering from a Century-Old Timing Authority

When it comes to protecting and completing your engine's timing system, few names carry the weight of Cloyes. Founded in 1921, Cloyes has spent over a century as the North American leader in timing drive systems, and that deep expertise is on full display in their engine timing cover lineup. These covers aren't an afterthought — they're engineered as a deliberate, precision-matched complement to Cloyes' broader timing system solutions.

The Quick Button™ Two-Piece Timing Cover

The centerpiece of Cloyes' engine timing cover offering is the iconic Quick Button™ Two-Piece Timing Cover. Constructed from precision die-cast aluminum, this cover was designed specifically to work in harmony with Cloyes' legendary Hex-A-Just® True® Roller Timing Sets. What sets it apart from a standard cover is its revolutionary access design: you can adjust camshaft end play and cam timing without removing the oil pan or vibration damper — a feature that saves hours of setup time on the dyno or at the track.

• Two-piece die-cast aluminum construction for precise fitment and lasting durability
• Built-in rollerized, endplay-adjustable cam button — no separate cam button purchase required
• O-ring sealed access button, eliminating the need for gaskets or sealants at the access point
• Timing cover bolts included for a complete, ready-to-install solution
• Available in multiple configurations, including small block Chevy with big block cam and/or crank snout fitments (e.g., part numbers 9-221, 9-227, 9-231)

Why Cloyes Timing Covers Belong in Your Build

Cloyes developed and patented the very first True® Roller timing set in 1970, and that same commitment to innovation defines their timing covers today. The Quick Button cover exists because Cloyes understands that precise cam timing adjustments are an ongoing part of performance engine development — not a one-time installation task. By building the adjustment access directly into the cover, Cloyes eliminates one of the most time-consuming pain points in performance engine tuning.

For builders working with Cloyes' Hex-A-Just® adjustable timing sets, pairing the timing chain set with a matching Cloyes timing cover ensures the entire front-of-engine system is engineered to work together. Replacement plate components (such as the 9-221B) are also available, designed specifically to fit the 9-221, 9-227, and 9-231 timing cover families — making long-term serviceability straightforward.

From the Street to the Strip

Cloyes' timing covers appeal to a wide range of builders. Weekend warriors refreshing a classic small-block Chevy, experienced engine builders chasing dyno numbers, and performance enthusiasts building for the track all benefit from a cover that keeps the timing system sealed, accessible, and properly supported. With more than 50 years of racing heritage backing their high-performance products, Cloyes brings race-proven thinking to every component they produce.

Browse the full selection of Cloyes engine timing covers above, and explore the complete Cloyes brand catalog or the broader engine timing cover category to find the right fit for your application.