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CYLINDER HEAD DESCRIPTION SPECIFICATION Metric Standard Gasket Thickness (Compressed) 0.65-0.75 mm 0.0007-0.0024 VALVES DESCRIPTION SPECIFICATION Metric Standard Face Angle- Intake - 45-45.5° Face Angle- Exhaust - 45-45.5° Head Diameter- Intake 47.87-48.13 mm 1.88-1.89 in. Head Diameter- Exhaust 35.37-35.63 mm 1.39-1.40 in. Valve Lift (Zero Lash)-Intake and Exhaust- 3.3L 9.80 mm 0.385 in. Valve Lift (Zero Lash)-Intake and Exhaust- 3.8L 11.0 mm 0.433 in. Valve Length- Intake 125.84-126.6 mm 4.95-4.98 in. Valve Length- Exhaust 127.20-127.96 5.00-5.04 in. Valve Stem to Tip Height (valve tip to spring seat washer)-Intake 48.1-49.7 mm 1.89-1.95 in. Valve Stem to Tip Height (valve tip to spring seat washer)- Exhaust 48.53-50.09 mm 1.91-1.97 in. VALVE SEAT DESCRIPTION SPECIFICATION Metric Standard Angle - 44.5-45° Run Out (Service Limits) 0.0762 mm 0.003 in. Width-Intake 1.50-2.00 mm 0.057-0.078 in. VALVE GUIDE DESCRIPTION SPECIFICATION Metric Standard Guide Bore Diameter (Std.) 6.975-7.00 mm 0.274-0.275 in. VALVE MARGIN DESCRIPTION SPECIFICATION Metric Standard Intake 0.825-0.973 mm 0.032-0.038 in. Exhaust 1.565-1.713 mm 0.061-0.067 in. VALVE STEM DIAMETER DESCRIPTION SPECIFICATION Metric Standard Intake (Standard) 6.935-6.953 mm 0.2718-0.2725 in. Exhaust (Standard) 6.906-6.924 mm 0.2718-0.2725 in. VALVE STEM TO GUIDE CLEARANCE DESCRIPTION SPECIFICATION Metric Standard Intake 0.025-0.065 mm 0.001-0.0025 in. Exhaust 0.059-0.094 mm 0.002-0.0037 in. Max Allowable- Intake (Rocking Method) 0.247 mm 0.010 in. RS ENGINE 3.3/3.8L 9 - 97 ENGINE 3.3/3.8L (Continued) |