Engine Valve Rotator

The older style standard shims will not hold up to the extreme spring pressures and high RPM found in racing engines being built today. COMP Cams offers a simple but effective solution to this problem - a thin, hardened steel alloy seat which will not only protect the head and shim but also locate and hold the spring in place. Previously, this part has been available only in a cup form with the retaining portion being on the outside of the part. This required that the head be machined a great deal to accept this cup so COMP now offers an I.D. locator with the locating shoulder on the inside, as well as the spring cup. Many sizes are available to locate from the inside or outside diameter.

Part Type

Engine Valve Spring Seat

Product Overview

*Valve Spring Shims and Kits*
• Equalize installed height of valve spring
• Engineered from the highest quality shim stock
• Heat-treated to withstand radical camshaft lobes
• Available in three different thicknesses to help achieve proper valve spring height
• Shim kits contain (16) pieces of each thickness listed

*Big Block Chevrolet Seat Spacers*
Late model Big Block Chevrolet engines are originally equipped with exhaust valve rotators. Until now, the only way to make up for the rotator was to stack .300" of shims under the spring. This was not only sloppy, but they also didn't fit well. These seat spacers offered by COMP Cams will locate the spring with an outside step so the spring cannot “walk” around on the head.

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Product Details

Product Downloads

#	Document Type	Download
1.	Catalog

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Reference Information

Valve Spring Locator, Outside Locating Shoulder, Steel, 0.300 in. Thick, 1.732 in. O.D., 0.623 in. I.D., 1.568 in. Spring O.D., Set of 100

As with all other areas in the valvetrain, the area where the spring sits also takes a beating. The old standard shims and/or seats simply will not hold up to the extreme pressures and high rpm found in today's performance engines. COMP Cams valve spring locators solve this problem and eliminate failures.