VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [MZR 1.6]

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• The valves are made of heat-resistant steel for wear resistance improvement.

Valve specification

ITEM			SPECIFICATION
Valve full length	(mm {in})	Intake valve	Approx. 97.1 {3.82}
Valve full length	(mm {in})	Exhaust valve	Approx.96.6 {3.81}
Valve umbrella diameter	(mm {in})	Intake valve	Approx. 29.2 {1.15}
Valve umbrella diameter	(mm {in})	Exhaust valve	Approx. 25.9 {1.02}
Stem diameter	(mm {in})	Intake valve	Approx. 5.5 {0.22}
Stem diameter	(mm {in})	Exhaust valve	Approx. 5.5 {0.22}

• The intake valve and the exhaust valve are tufftride processed to improve abrasion resistance.

• Unequal pitch valve spring has been adopted. In addition, the upper diameter is smaller compared to the bottom diameter. As a result, combustion efficiency has been improved by the reduced size of the upper valve spring seat and the reduced load on the valve spring.

• The valve guide is made of 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.

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