Screw Crankshaft Pulley M141.5102 is a critical high-strength fastener designed for securing the crankshaft pulley to the engine’s crankshaft. This specific component is essential for maintaining the precise timing and drive connection between the crankshaft and auxiliary systems such as the alternator, power steering pump, and air conditioning compressor via the serpentine or V-belt.

Engineered to exacting OEM specifications, this screw features an M14 metric thread with a fine 1.5 mm pitch. The 102 mm length is carefully calibrated to provide the necessary clamp load and engagement depth for a secure fit in its designated application. Typically manufactured from high-grade alloy steel and often undergoing heat treatment, it offers exceptional tensile strength and resistance to the severe vibrational stresses and torsional loads present in the engine’s front end. Failure of this component can lead to catastrophic engine damage, including loss of accessory drive, timing disruption, and potential separation of the pulley.

When replacing this vital fastener, it is imperative to use the specified torque and tightening sequence as outlined in the vehicle’s service manual. The use of a new, genuine-specification screw is highly recommended during pulley or timing belt service, as fasteners can stretch and fatigue over time. This ensures the long-term reliability and safety of your engine’s core drive system.