Valve Cover Grommet Set 97-16 Chevy LS

The Valve Cover Grommet Set 97-16 Chevy LS is an essential wear item for anyone maintaining or rebuilding an LS-platform engine. These small but critical sealing components prevent oil leaks around spark plug wire tubes and sensor passages where the valve cover meets the cylinder head. If you're experiencing oil weeping around your valve covers on a 1997–2016 Chevy LS engine—whether in a truck, Corvette, or street machine—worn or deteriorated grommets are almost always the culprit, making replacement a routine part of engine upkeep.

Manufactured by MAHLE ORIGINAL/CLEVITE under part number GS33466, this grommet set uses engineered elastomer construction designed to withstand sustained exposure to high under-hood temperatures and repeated thermal cycling that the LS engine generates. The grommets compress against the valve cover gasket surface to create a positive seal while accommodating minor movement and vibration from engine operation. OEM-equivalent materials ensure that the set maintains compression characteristics over time, unlike inferior aftermarket alternatives that often harden and lose sealing ability within a season or two of use.

This grommet set fits all LS variants across the 1997–2016 model span, including LS1, LS2, LS3, LS6, LSx, and truck applications like the 5.3L and 6.0L. Whether you're freshening a stock engine during scheduled maintenance or assembling a modified LS for a project vehicle, replacing grommets during valve cover service prevents future oil contamination of spark plug boots and sensor connectors. Installation is straightforward during any valve cover removal procedure; simply press the old grommets out and seat new ones into the valve cover casting before reinstalling covers with fresh gasket material.