Our C6.4 CAT engine intake exhaust valve is a high-precision CAT C6.4 excavator engine valve and complete C6.4 diesel engine valve set, designed as a durable heavy-duty engine intake exhaust valve, standard CAT C6.4 replacement valve, essential excavator engine maintenance parts, and reliable OEM C6.4 engine valve assembly. It is engineered exclusively for CAT C6.4 diesel engines fitted on CAT 320D, 320DL, 323D series excavators, precisely controlling intake air and exhaust gas flow to ensure efficient combustion and stable power output. The intake valve adopts premium martensitic stainless steel, while the exhaust valve uses high-temperature resistant nickel-based alloy, with induction-hardened valve tips and cobalt-chromium alloy hardface on exhaust valve seats, delivering excellent wear resistance, high temperature resistance and sealing performance. Under extreme working conditions (intake 200–300°C, exhaust up to 600–800°C), this CAT C6.4 excavator engine valve maintains stable sealing and accurate valve timing, preventing air leakage, power loss and abnormal exhaust. Manufactured to strict OEM dimensions, every C6.4 CAT engine intake exhaust valve matches original valve seat, valve spring and camshaft perfectly, enabling direct replacement without modification. As critical excavator engine maintenance parts, it effectively solves common faults such as engine power drop, black smoke, abnormal noise and difficult starting caused by valve wear, ablation or poor sealing. Each OEM C6.4 engine valve assembly undergoes 100% dimensional inspection, hardness testing and air tightness testing before shipment, ensuring consistent quality and long service life for heavy-duty construction, mining and quarrying environments.

• OEM Exact Fit for CAT C6.4 Engine

  This CAT C6.4 replacement valve fits CAT 320D/320DL/323D excavators perfectly, matching original valve seat and spring for direct installation.

• High-Temperature & Wear-Resistant Material

  Intake: martensitic stainless steel; Exhaust: nickel-based alloy with cobalt-chromium hardface, anti-ablation and long-lasting.

• Induction-Hardened Valve Tip

  Enhanced surface hardness, strong impact resistance, reducing wear during frequent opening/closing.

• Excellent Sealing & Air Tightness

  Precisely machined valve face ensures tight seal, preventing compression loss and power drop.

• Solves Common Engine Faults

  Effectively eliminates black smoke, power loss, abnormal noise and hard start caused by valve failure.

• 100% Factory Tested

  Every OEM C6.4 engine valve assembly is dimensionally, hardness and air tightness tested for reliability.

  
  
  FAQ

  Q1: Which excavator models does this valve set fit?

  A1: This C6.4 CAT engine intake exhaust valve is for CAT C6.4 engine, fitting CAT 320D, 320DL, 323D excavators. It is a complete CAT C6.4 excavator engine valve, durable C6.4 diesel engine valve set, heavy-duty heavy-duty engine intake exhaust valve, standard CAT C6.4 replacement valve, essential excavator engine maintenance parts, and reliable OEM C6.4 engine valve assembly.

  Q2: Is professional installation required?

  A2: Recommended professional installation with valve lash adjustment (intake 0.25mm, exhaust 0.40mm). This CAT C6.4 replacement valve is OEM-size for direct fit.

  Q3: How often should valves be inspected/replaced?

  A3: Inspect every 2,000–3,000 hours; replace every 8,000–10,000 hours or when noise/power loss occurs. Regular maintenance extends valve life.