New Hamilton Cams 6.7L Fire Ring Gasket – .066″ Thickness, 4.560″ DiameterWire. Fits 2007.5-2018 Cummins 6.7L.
Looking for a reliable head gasket solution for your 6.7L Cummins underhigh-performance conditions? Hamilton Cam’s 6.7L Fire Ring Gasket isdesigned to handle extreme cylinder pressures, providing a superior seal thatprotects against leaks and failure—especially important as horsepower climbsbeyond 800 HP.
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
- Studs Required
- Must use high-strength studs to achieve proper clamp load, particularly with our competition gasket.
- 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.
- 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.
- 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.
- 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.