Crankshaft Woodruff Key for GM LS Engines 4.8L 5.3L 5.7L 6.0L 6.2L 7.0L 12561513

Crankshaft Woodruff Key for GM LS Engines

This crankshaft woodruff key is a precision engine component designed to align and secure the crankshaft timing gear or pulley on GM LS engines, serving as a direct replacement for OEM part number 12561513.

Overview

The crankshaft woodruff key is an essential part for GM LS engine builds, ensuring correct timing and preventing component slippage. It fits a wide range of LS displacements including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L, making it a versatile choice for engine rebuilds and repairs. This key is machined to OEM specifications for reliable performance.

Built For Performance

• Precision-machined from hardened steel for long-lasting durability
• Correct keyway dimensions ensure a tight, wobble-free fit
• Directly replaces OEM part 12561513 for seamless compatibility
• Heat-treated construction resists wear and deformation under high torque
• Simple installation with no modifications required

On-The-Job Use

• During engine rebuilds and overhauls to reinstall crankshaft components
• When replacing timing chains, gears, or balancers on LS engines
• For performance engine builds requiring precise key alignment
• As a replacement for worn or damaged keys in high-mileage engines

Specs At A Glance

Good To Know

Q: What is the purpose of this woodruff key? A: It locks the crankshaft timing gear or pulley in the correct rotational position, preventing slippage that could disrupt engine timing.

Q: Will this key fit all LS engine variants? A: It is designed for GM LS engines with the listed displacements, but always verify keyway dimensions and serial number for your specific engine.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.