Product Descreiption
1. Product Parameters
- Part Number: 3942588
- Application: Designed for Cummins QSL9, ISL, and 6C/ISC 8.3L diesel engines
- Material: High-grade, heat-resistant alloy steel (for high-temperature and high-stress durability)
- Head Diameter: 1.496 inches (38.0 mm)
- Overall Length: 5.423 inches (137.7 mm)
- Stem Diameter: 0.3138 inches (7.97 mm)
- Seat Angle: 30 degrees
- Valve Clearance (Cold Engine): 0.305 mm (0.012 in)
2. Installation Position
The intake valve is installed vertically in the engine’s cylinder head, aligned with the intake port.
- It is positioned above the combustion chamber, with the valve stem sliding within a precision valve guide.
- The valve head seals against the intake valve seat when closed.
- It is actuated by the camshaft via lifters, pushrods, and rocker arms.
- Typically, two intake valves are installed per cylinder in these 24-valve engines.
3. Function
- Controls Air/Fuel Intake: Opens during the intake stroke to allow fresh, filtered air (diesel engines) to enter the cylinder.
- Seals Combustion Chamber: Closes tightly during compression and power strokes to contain pressure and ensure efficient combustion.
- Enables Engine Cycle: Works in precise synchronization with the exhaust valve and piston movement to complete the four-stroke cycle.
- Supports Performance: Ensures optimal airflow for maximum power output, fuel efficiency, and low emissions.
