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DESCRIPTION SPECIFICATION Stem to Guide Clearance 0.025 - 0.076 mm (0.001 - 0.003 in.) ValveFace Angle Intake 46.5° Exhaust 46.5° Valve Head Diameter Intake 48.387 - 48.641 mm (1.905 - 1.915 in.) Exhaust 37.973 - 38.227 mm (1.495 - 1.505 in.) Tip Refinishing (Max Alowable) 0.25 mm (0.010 in.) VALVE SPRINGS Free Length (Approx.) 47.65 mm (1.876 in.) Spring Load Valve Closed 316 to 351 N @ 41.656 mm (71 to 79 Lbs. @ 1.64 in.) Valve Open 898.6 to 969.7 N @ 30.89 mm (202 to 218 Lbs. @ 1.216 in.) Inside Diameter (Top) 21.0 mm to 21.51 mm (0.827 to 0.847 in.) Installed Height 41.656 mm (1.640 in.) CRANKSHAFT End Play 0.038 to 0.165 mm (0.0015 to 0.0065 in.) Main Bearing Journal Diameter 63.489 to 63.502 mm (2.4996 to 2.5001 in.) DESCRIPTION SPECIFICATION Main Bearing Journal Width No. 1 27.58 to 27.89 mm (1.086 to 1.098 in.) No. 2 32.28 to 32.33 mm (1.271 to 1.273 in.) No. 3-4-5 30.02 to 30.18 mm (1.182 to 1.188 in.) Main Bearing Clearance 0.03 to 0.06 mm (0.001 to 0.0025 in.) Main Bearing Clearance (Preferred) 0.051 mm (0.002 in.) Connecting Rod Journal Diameter 53.17 to 53.23 mm (2.0934 to 2.0955 in.) Connecting Rod Journal Width 27.18 to 27.33 mm (1.070 to 1.076 in.) Out of Round - Max 0.013 mm (0.0005 in.) Taper - Max 0.013 mm (0.0005 in.) CYLINDER BLOCK Deck Height 236.73 mm (9.320 in.) Deck Clearance 0.000 mm (0.000 in.) Cylinder Bore Diameter— Standard 98.45 to 98.48 mm (3.8759 to 3.8775 in.) Cylinder Bore Diameter— Taper (Max) 0.025 mm (0.001 in.) Out of Round (Max) 0.025 mm (0.001 in.) Tappet Bore Diameter 23.000 to 23.025 mm (0.9055 to 0.9065 in.) Flatness 0.03 mm per 25 mm (0.001 in. per 1 in.) 0.05 mm per 152 mm (0.002 in. per 6 in.) 9 - 56 2.5L ENGINE XJ SPECIFICATIONS (Continued) |