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VALVE SPRING DESCRIPTION SPECIFICATION Metric Standard Free Length (Approx) Intake 48.18 mm 1.896 in. Exhaust - w/damper 48.2 mm 1.897 in. Spring Force (Valve Closed) Intake 332.0 - 368.0 N @ 40.12 mm 74.63 - 82.72 lbs. @ 1.5795 in. Exhaust - (without damper) 356 - 394 N @ 39.12 mm 80.031 - 88.57 lbs. @ 1.54 in. Spring Force (Valve Open) Intake 948.0 - 1038.0 N @ 28.12 mm 213.2 - 233.8 lbs. @ 1.107 in. Exhaust - without damper 974 - 956 N @ 27.12 mm 218.8 - 215.1 lbs. @ 1.067 in. Number of Coils Intake 7.30 Exhaust 7.15 Wire Diameter Intake 4.77 × 3.80mm 0.1878 × 0.1496 in. Exhaust 4.66 × 3.72mm 0.1843 × .1464 in. Installed Height (Spring Seat to Nominal Intake 40.12 mm 1.579 in. Exhaust - w/damper 40.12 mm 1.579 in. CYLINDER HEAD DESCRIPTION SPECIFICATION Metric Standard Gasket Thickness (Compressed) 0.7 mm (0.0276 in.) Valve Seat Angle 44.5° - 45.0° Valve Seat Runout (MAX) 0.051 mm 0.002 in. Valve Seat Width Intake 1.75 - 2.36 mm 0.0698 - 0.0928 in. Exhaust 1.71 - 2.32 mm 0.0673 - 0.0911 in. Guide Bore Diameter (Std.) 6.975 - 7.00 mm 0.2747 - 0.2756 in. Cylinder Head Warpage (Flatness) 0.0508 mm 0.002 in. 9 - 790 ENGINE - 3.7L SERVICE INFORMATION ND |