The 3142A181 Exhaust Valve is precision-engineered for 6.6-liter inline diesel engine platforms, specifically compatible with 1106D, 1106C, and 1106E series power units. This valve is extensively utilized across heavy-duty construction equipment, including 20-ton to 30-ton class hydraulic excavators (320D, 323D, 326D, 329D, 336 models), material handlers, and industrial power generation systems.
The valve efficiently expels combustion gases from the combustion chamber, ensuring optimal engine breathing and preventing exhaust gas recirculation that could reduce power output. It is compatible with turbocharged and aftercooled diesel engines featuring electronic fuel injection systems, supporting reliable operation in high-demand earthmoving, mining, agricultural, and stationary power applications. The valve maintains critical sealing integrity during high-temperature exhaust cycles, contributing to improved engine efficiency and reduced emissions.
Head Hardness: HRC 25-30 with nitrided surface layer for high-temperature creep resistance
Quantity per Engine: 6 units (6-cylinder engines)
Valve Guide Compatibility: Precision-matched to 3314A261 exhaust valve guides
Material & Performance Features
The exhaust valve is manufactured from high-grade 21-4N austenitic heat-resistant stainless steel combined with 4Cr9Si2 martensitic alloy steel, featuring exceptional creep resistance, thermal fatigue strength, and high-temperature oxidation resistance. The 21-4N material (containing 21% chromium, 4% nickel, and nitrogen additions) provides superior hot hardness and corrosion resistance against lead oxide and sulfur compounds present in exhaust gases.
The valve undergoes advanced gas nitriding surface treatment, creating a hardened diffusion layer that significantly improves wear resistance, scuffing resistance, and fatigue life under cyclic high-temperature operating conditions. This surface hardness treatment ensures minimal stem-to-guide wear and maintains precise valve seating geometry over extended service intervals, even when exposed to exhaust gas temperatures exceeding 700°C.