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VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [L3 Turbo]

id0110b3101100
• The valves are heat-resistant steel. There are two intake valves, two exhaust valves per cylinder.
• In order to provide resistance against high-temperature loads, a nickel-based steel with a high heat resistance has been adopted for the exhaust valves.

Valve specification

Item | L3 Turbo
--- | ---
Valve length (overall) | (mm {in}) | Intake valve: 102.99-103.79 {4.055-4.086} Exhaust valve: 104.25-105.05 {4.105-4.135}
Intake valve umbrella diam. | (mm {in}) | 34.85-35.15 {1.3720-1.3838}
Exhaust valve umbrella diam. | (mm {in}) | 29.85-30.15 {1.1752-1.1870}
Stem diam. | (mm {in}) | Intake valve:5.970-5.985 {0.2351-0.2356} Exhaust valve:5.965-5.980 {0.2349-0.2354}

• The intake valve and the exhaust valve are treated with the tufftride process to improve abrasion resistance.
• The valve spring is an uneven outer dimension type. It has been improved by reducing the size of the upper seat.
• The valve guide is made of the sintered alloy to improve abrasion resistance.
• The valve seat is integrated with the lower valve spring seat to simplify the unit and improve its serviceability.

1 | Valve keeper
2 | Upper valve spring seat
3 | Valve spring
4 | Valve seal
5 | Valve guide
6 | Valve