Product Descreiption
Product Parameters (Specifications)
- Part Number: 3942589A-QSL (OEM Cross Reference: 3942589, 3800341)
- Application: Fits Cummins QSL9, ISL, 6L 8.3L diesel engines
- Material: Bi-metal (high-temperature resistant alloy)
- Valve Head Diameter: 38 mm (1.496 in)
- Overall Length: 137.8 mm (5.424 in)
- Valve Stem Diameter: 8 mm (0.3138 in)
- Valve Seat Angle: 45°
- Stem Type: Single-groove, chromed surface
- Weight: Approx. 0.14 kg (0.3 lbs)
Installation Position
- Location: Mounted vertically in the engine cylinder head
- Position: Installed in the exhaust port passages of each cylinder
- Assembly: The valve stem slides through the valve guide in the cylinder head; the head seals against the exhaust valve seat. It is held closed by a valve spring and secured with keepers/retainers at the stem tip.
Function
- Gas Flow Control: Opens during the exhaust stroke to allow combustion exhaust gases to exit the cylinder.
- Sealing: Closes tightly during intake, compression, and power strokes to maintain cylinder pressure and prevent gas leakage.
- Heat Resistance: Withstands extreme temperatures (up to ~800°C) from hot exhaust gases.
- Engine Cycle: Works with the camshaft for precise timing to ensure efficient four-stroke engine operation.
