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

id0110b3101100

•  The valves are made 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

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