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CYLINDER HEAD EM-233 < SERVICE INFORMATION > [VK45DE] C D E F G H I J K L M A EM N P O Measure the diameter of valve stem with micrometer. Valve Guide Inner Diameter Measure the inner diameter of valve guide with inside micrometer. Valve Guide Clearance (Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter). • If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be replaced, refer to "VALVE GUIDE REPLACEMENT". VALVE GUIDE REPLACEMENT When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide. 1. To remove valve guide, heat cylinder head to 110 to 130 ° C (230 to 266 ° F) by soaking in heated oil. 2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US CAUTION: Cylinder head contains heat. When working, wear protec- Standard Intake : 5.972 - 5.980 mm (0.2351 - 0.2354 in) Exhaust : 5.962 - 5.970 mm (0.2347 - 0.2350 in) SEM938C Standard Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in) Valve guide clearance: Standard Intake : 0.020 - 0.046 mm (0.0008 - 0.0018 in) Exhaust : 0.030 - 0.056 mm (0.0012 - 0.0022 in) Limit Intake : 0.08 mm (0.0031 in) Exhaust : 0.1 mm (0.004 in) SEM008A SEM931C |