VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [L8, LF]

id0110a9101100

• The valves are heat-resistant steel. There are two intake valves, two exhaust valves per cylinder.

Valve specification

item

Specification

L8

LF

valve full length
(mm {in})
Intake valve: About 101.6 {4.000}
Exhaust valve: About102.6 {4.039}
Intake valve: About 103.4 {4.070}
Exhaust valve: About 104.7 {4.122}
Intake valve umbrella diameter
(mm {in})
About 32.5 {1.28}
About 35 {1.38}
Exhaust valve umbrella diameter
(mm {in})
About 28 {1.10}
About 30 {1.18}
Stem diameter
(mm {in})
Intake valve: About 5.5 {0.22}
Exhaust valve: About 5.5 {0.22}

• 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 seal is integrated with the lower valve spring seat to simplify the unit and improve its serviceability.