O-Ring Seal LSX Block Cam Thrust Plate

The O-Ring Seal LSX Block Cam Thrust Plate from Chevrolet Performance is a precision rubber seal component engineered for GM LS-series engine blocks. This OEM-specification part maintains critical crankcase pressure control and prevents oil leakage at the camshaft thrust surface—a function essential to engine longevity and performance consistency across high-output LSX platforms used in street applications, drag racing, and engine rebuilds.

Built to exact Chevrolet Performance tolerances, this o-ring seal measures 3.95 x 0.25 x 4.7 inches and weighs just 0.04 lbs, fitting precisely into the LSX block camshaft thrust plate assembly. The elastomer composition resists thermal cycling and engine oil degradation over extended operation. As an individual seal replacement, it addresses wear or damage without requiring full engine disassembly—a cost-effective maintenance solution when sealing integrity becomes compromised during routine service or after performance upgrades.

Engine builders and enthusiasts working with LS-series platforms—whether naturally aspirated, supercharged, or turbocharged—rely on this OEM seal to prevent oil weeping and maintain proper thrust bearing preload. Chevrolet Performance components are designed for direct fitment and long-term durability. This part is essential for anyone rebuilding an LSX engine block or replacing worn seals during performance maintenance to restore factory sealing performance and prevent oil contamination in the timing drive.