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.
• The intake valve and the exhaust valve are treated with the tufftride process to improve abrasion resistance.
• Unequal pitch beehive shape valve spring has been adopted. In addition, the upper diameter is smaller compared to the bottom diameter. As a result, fuel consumption 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 the sintered alloy to improve abrasion resistance.
• The lower valve spring seat is integrated with the valve seal to simplify the unit.
Valve specification
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Item
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Specification
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Intake valve
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Exhaust valve
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Valve full length
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(mm {in})
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102.99—103.79 {4.0548—4.0862}
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104.25—105.05 {4.1044—4.1358}
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|
Valve head diameter
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(mm {in})
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34.85—35.15 {1.373—1.383}
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29.85—30.15 {1.176—1.187}
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Stem diameter
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(mm {in})
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5.970—5.985 {0.2351—0.2356}
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5.965—5.980 {0.2349—0.2354}
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