Engine Valve Cover Hold Down Tab
Proform Parts 141-757 Valve Cover Hold Down Clamps Black Crinkle Small Block Chevy
Proform Parts 141-782 Engine Valve Cover Hold-Down Clamps Orange with Black Bowtie Logo Small Block Chevy 4-Piece Set
Representative Photo, actual item may vary
What Are Engine Valve Cover Hold Down Tabs?
A valve cover hold down tab is an essential component used to secure the valve cover in place on an engine, designed to prevent the valve cover from coming loose during operation and to help maintain a proper seal. Often overlooked during engine builds and restorations, these small but critical brackets are the difference between a dry, well-sealed engine bay and a frustrating, recurring oil leak.
Hold down tabs are typically made of durable materials such as steel or aluminum and are installed on top of the valve cover, securing it tightly to the cylinder head. On stamped steel valve covers in particular — common on classic small block and big block Chevrolet engines — the thin sheet metal flanges around the bolt holes are prone to distortion when fasteners are overtightened. Hold down clamps spread the load over a wider area, minimizing the distortion of the valve cover flanges, which greatly decreases the possibility of oil leakage.
Why They Matter for Your Engine
These brackets help prevent oil leakage from stamped valve covers, allowing you to tighten down covers while helping to prevent bending the flange. A bent or distorted flange breaks the seal between the gasket and the cylinder head surface, leading to leaks that can coat engine components in oil, create fire hazards, and result in costly cleanup. Replacing or reinforcing your valve cover hardware with quality hold down tabs is one of the most cost-effective ways to maintain a clean, properly sealed top end.
High-quality hold down tabs are often made from sturdy materials to withstand the vibrations and heat generated by the engine, and may also feature corrosion-resistant finishes to maintain their appearance and durability over time. For enthusiasts building a show engine or a hot rod, chrome-finished tabs also add a polished, purposeful look under the hood.
What to Consider When Shopping
Different engines may have varying valve cover designs and mounting hole patterns, so it's important to ensure that the hold down tab is compatible with your valve cover and can be properly aligned with the mounting holes on the cylinder head. Key factors to evaluate include:
- Bolt hole size: Common sizes include 1/4 in. and 5/16 in.; match this to your valve cover bolts or studs.
- Cover style: Ensure that the hold down tab is designed for the type of valve cover you are using, whether it's for a small block Chevy (SBC) or a big block Chevy (BBC) engine.
- Tab width: Wider tabs distribute clamping load over a greater surface area for better flange protection and a more consistent gasket seal.
- Material and finish: Chrome-plated steel tabs offer corrosion resistance and visual appeal, while black-finished options suit stealth or custom engine builds.
- One-piece vs. individual tabs: One-piece holddowns are fast to install, eliminating the need to fumble with four separate flange reinforcement clamps.
Top Brands for Engine Valve Cover Hold Down Tabs
Proform Parts is the leading name in this category, offering a wide range of valve cover hold down tabs purpose-built for GM performance applications. With dozens of patents, thousands of SKUs, and millions of satisfied customers, Proform has brought innovation, quality, and affordability to enthusiasts for over 30 years. Their GM-licensed tabs featuring the iconic Chevy Bowtie emblem are a popular choice for small block and big block restoration and performance builds alike.