Repl. Rocker Arm Bearing GM LS 1997-2017

The COMP Cams Replacement Rocker Arm Bearing for GM LS engines (1997–2017) is an essential component for anyone maintaining or rebuilding a high-performance LS platform. Whether you're diagnosing worn valve train noise, completing a full engine rebuild, or swapping rocker arms after years of track abuse, this bearing assembly restores proper clearance and eliminates excess play in the rocker arm pivot. LS engines are known for durability, but the rocker arm bearings endure constant radial and axial loads from valve spring pressure—replacement becomes necessary when metallurgical wear compromises bearing surface finish.

This bearing is engineered to OEM specifications and designed specifically for the LS rocker arm assembly geometry found across 5.3L, 6.0L, 6.2L, and larger displacement variants. COMP Cams manufactures this bearing to maintain precise pivot tolerances that directly affect valve timing accuracy and lifter preload consistency. The compact dimensions (1.9 × 0.9 × 5.4 inches) ensure proper fit within the rocker arm cavity, and the lightweight construction (0.02 lbs) reflects precision machining rather than bulk material. Proper bearing clearance is critical: excessive wear allows rocker arm rocking, which introduces valve train flex, compromises cam lobe contact, and can lead to premature valve seat erosion or lifter failure.

This replacement bearing is ideal for engine builders, performance tuners, and experienced DIY mechanics rebuilding LS platforms for street, strip, or marine applications. Installation requires removing the rocker arm assembly and pressing or carefully drifting the old bearing out before pressing the new unit into the rocker arm body—a task well within reach of anyone with basic machine shop tools or access to a press. Compatibility spans all LS generations from 1997 forward, making this a go-to service part for any LS engine diagnostics involving valve train noise, rocker arm replacement, or complete rotating assembly overhauls.