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DESCRIPTION SPECIFICATION No.3 41.928–41.947 mm (1.650–1.651 in.) No.4 42.328–42.374 mm (1.666–1.668 in.) No.5 42.728–42.747 mm (1.682–1.6829 in.) Bearing Clearance— 0.053–0.093 mm (0.0027–0.003 in.) Bearing Clearance (Max. 0.12 mm (0.0047 in.) End Play 0.05–0.39 mm (0.002–0.015 in.) Lift (Zero Lash) Intake 7.2 mm (0.283 in.) Exhaust 7.03 mm (0.277 in.) Exhaust Valve Timing* Closes (ATDC) 5.4° Opens (BBDC) 43.7° Duration 229.1° Intake Valve Timing* Closes (ABDC) 41.1° Opens (ATDC) 13.9° Duration 207.2° Valve Overlap 84.8° *All readings in crankshaft degrees, at 0.5 mm Cylinder Head Material Cast Aluminum Gasket Thickness 1.15 mm (0.045 in.) Valve Seat Angle 45° Seat Diameter—Intake 33 mm (1.299 in.) Seat Diameter—Exhaust 28 mm (1.102 in.) Runout (Max.) 0.05 mm (0.002 in.) Valve Seat Width—Intake 0.9–1.3 mm (0.035–0.051 in.) DESCRIPTION SPECIFICATION Service Limit—Intake 2.0 mm (0.079 in.) Service Limit—Exhaust 2.5 mm (0.098 in.) Valve Guide Diameter I.D. 5.975–6.000 mm (0.235–0.236 in.) Guide Bore Diameter 11.0–11.02 mm (0.4330–0.4338 in.) Guide Height (spring seat 13.25–13.75 mm (0.521–0.541 in.) Valves Face Angle Intake and 45–45.5° Head Diameter—Intake 32.12–33.37 mm 1.303–1.313 in.) Head Diameter—Exhaust 28.57–28.83 mm (1.124–1.135 in.) Valve Margin Intake 1.15–1.48 mm (0.0452–0.0583 Service Limit 0.95 mm (1/32 in.) Exhaust 1.475–1.805 mm (0.058–0.071 in.) Service Limit 1.05 mm (3/64 in.) Valve Length (Overall) Intake 114.69–115.19 mm (4.515–4.535 in.) Exhaust 116.94–117.44 mm (4.603–4.623 in.) Valve Stem Tip Height Intake 45.01–46.07 mm (1.77–1.81 in.) Exhaust 43.51–44.57 mm (1.71–1.75 in.) Valve Stem Diameter Intake 5.934–5.952 mm (0.2337–0.2344 in.) JX 2.0L SOHC ENGINE 9 - 65 SPECIFICATIONS (Continued) |