Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2002G20 L4-2.0L (SR20DE)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYSYSTEM SPECIFICATIONSGENERAL/SERVICE SPECIFICATIONSVALVE GUIDE - CLEARANCE
2002 Infiniti G20 L4-2.0L (SR20DE)
Valve Guide - Clearance
2002 Infiniti G20 L4-2.0L (SR20DE)SECTION Valve Guide - Clearance
VALVE GUIDE CLEARANCE
Valve deflection limit (Dial gauge reading):
Intake & Exhaust...............0.2 mm (0.008 inch)
Valve to valve guide clearance = valve guide inner diameter - valve stem diameter:
Standard
Intake......................0.020 - 0.053 mm (0.0008 - 0.0021 inch)
Exhaust....................0.040 - 0.073 mm (0.0016 - 0.0029 inch)
Limit
Intake..........................0.08 mm (0.0031 inch)
Exhaust.........................0.1 mm (0.004 inch)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.