VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [MZR 2.0 DISI i-stop]

id011037101100

•  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 heat-resistant steel has been adopted for the exhaust valves.

Valve specification

Item

Specification
Valve length (overall)
(mm {in})
Intake valve: Approx. 103.4 {4.071}
Exhaust valve: Approx. 104.7 {4.122}
Intake valve umbrella diam.
(mm {in})
Approx. 35 {1.4}
Exhaust valve umbrella diam.
(mm {in})
Approx. 30 {1.2}
Stem diam.
(mm {in})
Intake valve: Approx. 5.48 {0.216}
Exhaust valve: Approx. 5.47 {0.215}

•  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 lower valve spring seat is integrated with the valve seal to simplify the unit.
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