MECHANICAL
01–10–10
VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [LF]
E5U011012111N03
• The valves are heat-resistant steel. There are two intake valves, two exhaust valves per cylinder.
Valve specification
• 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.
End Of Sie
CAMSHAFT CONSTRUCTION [LF]
E5U011012420N01
• The cast iron 5 axis-hole, which has great rigidity, has been adopted for the camshaft to insure higher reliability.
• The endplay of the camshaft is regulated at the rear of the No. 1 journal.
• The lubricating oil is supplied through the oil supply hole at each journal. Additionally the cam nose part is chill
cast to improve the abrasion resistance and the width of cam hill part is shortened to reduce the weight.
• There is no camshaft sprocket positioning pin or key slot at the camshaft end. The camshaft sprocket is
secured using tightening pressure of the installation bolts.
• There is an oil line, by which the oil is supplied to the variable valve timing actuator, located at intake camshaft
(front of camshaft).
Camshaft Specification.
item Specification
valve full length (mm {in})
Intake valve: About 103.4 {4.070}
Exhaust valve: About 104.7 {4.122}
Intake valve umbrella diameter (mm {in}) About 35 {1.38}
Exhaust valve umbrella diameter (mm {in}) About 30 {1.18}
Stem diameter (mm {in})
Intake valve: About 5.5 {0.22}
Exhaust valve: About 5.5 {0.22}
VALVE SPRING
VALVE
VALVE GUIDE
VALVE SEAL
VALVE KEEPER
UPPER VALVE
SPRING SEAT
E5U110ZT5016
item
Specification
IN EX
LIFT (mm {in}) 9.1 {0.35} 7.8 {0.30}
Overlap (°) 5—35
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