Ford Crankshaft Pulley Bolt F5RZ6A340B OEM replacement — direct-fit, correct threads

Ford F5RZ6A340B (F5RZ-6A340-B) is the OEM crankshaft pulley bolt designed to secure the crank pulley on compatible Ford engines with factory fit and specification.

This single-component replacement bolt is engineered and sourced for Ford vehicles requiring the F5RZ6A340B part number. It’s a direct-fit item with the correct dimensions and threads for applications that originally used the F5RZ-6A340-B specification, making it a convenient option for maintenance, pulley service, or timing-related repairs.

What does this bolt replace and why choose the OEM Ford part?

This bolt replaces the factory crankshaft pulley retaining bolt on Ford applications that list F5RZ6A340B as the required part. Choosing an OEM-specified fastener helps ensure correct thread engagement, torque specs compatibility, and material integrity compared with generic alternatives.

• Direct-fit to Ford crankshaft pulley assemblies using F5RZ-6A340-B.
• Meets original thread pitch and shank length for correct installation.
• Manufactured or sourced to Ford specifications for reliable service.

How do I use this crankshaft pulley bolt during pulley or timing work?

Use this bolt to secure the crank pulley after aligning accessories or replacing the harmonic balancer. Always follow vehicle-specific torque sequences and recommended thread treatment (e.g., thread locker if specified) to avoid loosening and ensure long-term retention.

• Tighten to the torque value listed in the vehicle service manual.
• Replace the bolt whenever the service manual advises or if the bolt shows wear.
• Inspect mating surfaces on the crank flange and pulley for cleanliness before installation.

Is this bolt compatible with my Ford model and what are the physical specs?

Compatibility depends on the vehicle’s engine and year; consult your VIN-based parts catalog or service manual to verify that F5RZ6A340B is the correct crankshaft pulley bolt for your application. The product ships as a single bolt with dimensions and weight consistent with original equipment packaging.

• Package dimensions: 1.27 L x 10.16 H x 7.366 W centimeters.
• Package weight: approximately 0.204 kilograms.
• Country of origin: United States.

What should I check before installing this replacement bolt?

Before installation, confirm part number compatibility, inspect the crank flange and pulley for damage, and prepare the threads per manufacturer guidance. Using the correct torque wrench and following the service manual prevents thread damage and secures the pulley properly.

• Verify the F5RZ6A340B part number against your vehicle’s parts list.
• Clean mating surfaces and remove any old sealant or debris.
• Use the specified torque value and any recommended fastener treatment.

Who is this for: Technicians, DIY enthusiasts, and fleet maintenance managers who need an OEM-spec crankshaft pulley bolt for Ford engines. If you’re performing harmonic balancer replacement, accessory belt servicing, or timing component maintenance on Ford models that call for the F5RZ-6A340-B fastener, this single-item replacement provides a direct-fit solution to restore factory retention and alignment.