5.9 24V Cummins 1998.5-2002 VP Daily Driver Cylinder Head Reman

Part Number / SKU: CEP59C24VDHR

This cylinder head is assembled using a renewed, pressure-tested OEM core combined with brand-new, high-quality internal components, guaranteeing reliable operation and longevity.

Components and Parts:

• Remanufactured Casting: Built from a high-quality OEM core casting that has passed rigorous testing and machined to like-new specifications.
• New Wear Components: Equipped with all-new, high-quality valve seats, valve seals, and valve guides.
  
• New Injector Cups: Pre-installed new injector cups for proper fuel sealing.

Key Features and Fixes:

This head features key performance and durability upgrades, backed by an intense inspection protocol to guarantee every specification is met.

• Pressure Testing: After machining, every cylinder head is pressure tested at 40 PSI to confirm zero leaks and ensure casting integrity.
• Blow-Proof Plugs: Threaded, blow-proof plugs are installed in the top of the head for increased security and leak prevention.
• Final Quality Control: The head undergoes a final, extensive cleaning and quality control inspection. A detailed sign-off sheet is generated, measuring and recording critical specifications using a profilometer, including:

• Valve Recessions
• Stem Heights
• Installed Spring Heights
• Spring Pressures
• Keeper and Lock Positions
• RA Recording

This rigorous process ensures you receive a head that is significantly improved over the original and ready for years of demanding diesel operation.

Machining Process:

Aero Engines Inc has incorporated critical modifications and features to address common failure points of the factory 5.9L Cummins cylinder heads, drastically improving reliability.

• Optimal Sealing Surface: The deck is resurfaced to meet or exceed OEM specifications for Roughness Average (Ra), maximizing the sealing surface performance for the head gasket.
• Valve Train Geometry Alteration: We custom blueprint the head to alter valve height and valve recession, achieving maximum reliability.
• Lifter Longevity Fix: Valve stem heights are precisely altered to remove preload on the hydraulic lifter. This crucial modification decreases wear and significantly extends the life of the lifters.
• Optimized Flow: Valve seats are cut with a three-angle profile to optimize airflow and ensure proper sealing.
• Valve Prep: Valves are reground and their margins are meticulously inspected to guarantee proper sealing against the new seats.
• New Components: New valve stem seals, valve seats, valve guides, and injector cups are installed.

Meticulous Cleaning and Prep Process

Our commitment to quality begins before machining, with an intensive cleaning and stress-relieving process to ensure a flawless starting point.

1. Rigorous Inspection: Each core is subjected to Magnetic Particle Inspection (MPI) to thoroughly check for any cracks or subsurface imperfections.
2. Stress Relieving: The head undergoes a stress-relieving process in a furnace to eliminate residual oils and grease by turning them into ash.
3. Material Relaxation: The head is shot blasted to remove rust and scaling. This crucial step also relaxes the material before the precision machining begins.
4. Bolt Removal: All broken bolts and studs are professionally removed to ensure threads are clean and ready for installation.