6.7L Fire ring gasket +.020″ (.066″)

6.7L Fire Ring Gasket – .066″ Thickness, 4.560″ Diameter Wire

Gasket Specifications

• Thickness: .066″ (1.75 mm)
• Wire O.D.: 4.560″ (using .105″ wire)
• Groove Radius: .017″–.018″ if cutting grooves in the head or block

Installation & Preparation

1. Studs Required

   • Must use high-strength studs to achieve proper clamp load, particularly with our competition gasket.

2. Surface Flatness

   • Ensure the head is within .003″ end-to-end for optimal sealing.
   • Best practice: Machine both the head and block for perfect flatness.
   • if you do not surface the block, be sure to use an axe sharpening stone with 320 or finer to clean up the deck surface.

3. Groove Cutting

   • Engines <800 HP: cut grooves in the head
   • Be sure to use 625 studs
   • Always use a .120″ radiused cutter for precise groove formation.

4. Torque Procedure

   • Initial Torque: 130 ft-lbs at startup.
   • Hot Retorque: After reaching operating temperature, retorque while the engine is still warm.
   • Check Valve Lash: Each retorque further compresses the gasket, reducing valve lash—re-adjust as needed.
   • Final Check: Retorque at least once more before applying full load or RPM.

5. Proper Lubrication

   • Apply a liberal amount of lube to the nut, washer, and threads so that all studs see a consistent clamp load.
   • Never exceed manufacturer torque limits—fasteners at full torque store significant potential energy.

Why Choose Our 6.7L Fire Ring Gasket?

• Superior Seal under high boost and extreme pressures.
• Reduced Risk of Failure thanks to consistent clamp load and radiused grooves.
• Perfect for High-Power Builds, particularly those pushing beyond 800 HP.
• Proven Durability in severe-duty performance applications.

Maximize your 6.7L Cummins’ reliability and performance with our Fire Ring Gasket solution. Backed by years of engineering experience, it’s the trusted choice for racers, heavy haulers, and diesel enthusiasts alike. Thank you for choosing Hamilton products for your high-performance diesel needs!