oem Engine Head 308-1859 for 404dt C2.2 Diesel Engine

Q1: What is the product identification and applicable scope of the 308-1859 cylinder head?

Core Product & Compatibility Details

• Product Structure: Delivered as a ready-to-install assembly, integrating precision-machined alloy cast iron casting, 8 valves (2 intake + 2 exhaust per cylinder), nickel-chromium alloy valve seats, powder metallurgy valve guides, injector mounting bores, integrated coolant passages, and rocker arm pedestals. Pre-fitted sealing gaskets for critical joints reduce on-site assembly time.
• Applicable Machinery & Working Scenarios:
  • Excavators: Caterpillar 305E, 306E, 307E mini/midi excavators; Perkins-powered compact excavators (e.g., JCB 8055 ZTS);
  • Other Equipment: Small wheel loaders, skid-steer loaders, and stationary generators;
  • Typical Applications: Municipal engineering, garden landscaping, small-scale earthmoving, and residential foundation digging (light-to-medium load intermittent operation).
• Core Use Cases: Direct replacement for faulty original cylinder heads (e.g., casting cracks, valve seat wear, coolant leakage, injector bore deformation) and engine overhaul projects, restoring the 404DT/C2.2 engine’s compression ratio, power output, and operational stability.

Q2: What core functions does the 308-1859 cylinder head perform for 404DT/C2.2 engines?

Core Functions

1. Combustion Chamber Sealing & Pressure Resistance

   Seals the top of the engine cylinder to form a closed combustion chamber, working with the cylinder block, piston, and head gasket to withstand high combustion pressure (up to 8MPa) and temperature (up to 1000℃). It prevents gas leakage and ensures complete fuel combustion, directly determining the excavator’s digging force and low-speed torque (≥120N·m @ 1600rpm).

2. Valve Train Support & Air-Fuel Control

   Provides precise mounting positions for valves, valve springs, and rocker arms, controlling valve opening/closing timing and duration to optimize the engine’s air-fuel mixture ratio. This improves fuel efficiency by 4–6% compared to worn or non-OEM cylinder heads, reducing operating costs for small machinery fleets.

3. Cooling & Heat Dissipation Optimization

   Features integrated cross-flow coolant passages that circulate coolant around the combustion chamber, injector bores, and exhaust ports. The compact passage design fits the limited engine bay space of mini excavators, efficiently dissipating excess heat to prevent engine overheating during long-hour operation.

4. Fuel Injection System Integration

   Pre-machined high-precision injector mounting bores (φ14.5mm) ensure accurate positioning of 404DT/C2.2 engine injectors, enabling atomized fuel to be sprayed directly into the combustion chamber at high pressure (up to 120MPa). This enhances fuel atomization quality and reduces exhaust emissions, complying with non-road engine emission standards.

5. Auxiliary Component Mounting Base

   Serves as a stable platform for mounting key engine accessories (valve cover, intake/exhaust manifolds, fuel filter bracket). Its reinforced structural design withstands engine vibration (≤12g, 10–2000Hz) during off-road operation, avoiding accessory loosening or damage in rough terrain.