What is the main purpose of a valve lock?

The primary role of a valve lock is to temporarily locate the valve spring retainer and valve spring until the retainer's taper can create a collet effect, securely binding the lock and retainer together on the valve stem.

How do I know if these valve locks are the correct size for my valves?

When properly positioned on the valve stem, there should be a small gap between the two halves of the lock. If they fit together without a gap, they are too large for the valve stem.

Are these valve locks suitable for high-performance engines?

These are machined steel locks recommended for street applications with lighter valve spring loads. For applications with very high spring loads, COMP Cams offers other specialized lock options.

COMP Cams 11/32in Machined Steel Valve Locks Set of 100 648-

Name: COMP Cams Locks Eb MachD Steel 11/32in - Set of 100
Brand: COMP Cams
Price: 186.70 USD
Availability: InStock

COMP Cams Locks Eb MachD Steel 11/32in - Set of 100

$186.70

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams 11/32in machined steel valve locks, set of 100. Ensure proper valve spring and retainer seating during engine rebuilds.

Key Features

Fits 11/32 inch valve stems and 7-degree retainers.
Set includes 100 machined steel valve locks.
Designed for accurate valve spring and retainer seating.
Machined steel construction for durability and precise fit.
Suitable for engine rebuilds and street applications.

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Will this fit your vehicle?

Product Details

When you're rebuilding an engine, getting the valve train components seated correctly is crucial. These COMP Cams Machined Steel Valve Locks are designed for 7-degree retainers and fit 11/32-inch valve stems, making them a solid choice for many engine rebuilds, including those in popular vehicles like the Chevrolet Camaro, Pontiac Firebird, and Chevrolet Corvette from the 90s.

While the tang on a valve lock primarily helps position the retainer and spring, it's the taper of the retainer that truly secures the lock onto the valve stem through a collet effect. These locks are machined from steel for accuracy and durability, ensuring they work with the retainer to keep everything in place, even under significant spring loads. It's important that the two halves of the lock have a small gap when properly seated on the valve stem; if they fit flush, they're too large, and if they leave a gap in the middle, they're too small.

This set includes 100 locks, which is typically enough for a V8 engine. They are a direct replacement for stock applications and are well-suited for street use where precise valve spring location is important.