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6A-10 ENGINE MECHANICAL Valve Spring Squareness Use a surface plate and a square to measure the valve Valve Spring Tension Use spring tester to measure the valve spring tension. Valve Guide Caution: Valve Stem and Valve Guide Clearance (Measuring Method-I) 1. Set the dial indicator to the valve stem measuring point. 2. Move the valve stem end from side to side. Read the dial indicator. Valve Spring Squareness mm (in) Limit 1.0 (0.04) Valve Spring Tension N (kg/lb) Set Length mm (in) Standard Limit 47.0 (1.85) 414 — 477 (42.2 — 48.6/93 — 107) 401 (40.9/98) N6A0120E N6A0121E Total Dial Indicator Reading mm (in) Valve Standard Limit Intake Valve 0.038 — 0.071 (0.0015 — 0.0028) 0.20 (0.0079) Exhaust Valve 0.064 — 0.096 (0.0025 — 0.0038) 0.25 (0.0098) N6A0122E |