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Home >> Lexus >> 2001 >> IS 300 >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical >> Engine Specifications >> Engine Valves & Valve Springs Specifications

Engine Valves & Valve Springs Specifications

VALVES & VALVE SPRINGS

Application Specification
Intake Valves
Face Angle 44.5°
Minimum Margin .020" (.50 mm)
Minimum Refinish Length 3.8657" (98.190 mm)
Stem Diameter .2350-.2356" (5.970-5.985 mm)
Stem-To-Guide Oil Clearance
Standard .0010-.0024" (.025-.061 mm)
Wear Limit .0031" (.080 mm)
Exhaust Valves
Face Angle 44.5°
Minimum Margin .020" (.50 mm)
Minimum Refinish Length 3.8874" (98.740 mm)
Stem Diameter .2348-.2354" (5.964-5.980 mm)
Stem-To-Guide Oil Clearance
Standard .0012-.0026" (.030-.066 mm)
Wear Limit .0039" (.100 mm)
Valve Springs
Free Length
Pink Paint Mark 1.7209" (43.71 mm)
Yellow Paint Mark 1.7362" (44.10 mm)
Out-Of-Square .079" (2.01 mm)
Lbs. @ In. (kg @ mm) 
Pressure
Intake & Exhaust 42-46 @ 1.358 (19-21 @ 34.52)