4.7L Engine
SPECIFICATIONS - 4.7L ENGINEGENERAL SPECIFICATIONS
Engine Type 90 ° SOHC V-8, 16-Valve
Displacement 4.7 liters / 4701cc (287 cubic in.)
Bore 93.0 mm (3.66 in.)
Stroke 86.5 mm (3.40 in.)
Compression Ratio 9.0:1
Horsepower 235 bhp @ 4800 rpm
Torque 295 ft. lbs. @ 3200 rpm
Lead Cylinder # 1 Left Bank
Firing Order 1-8-4-3-6-5-7-2
CYLINDER BLOCK
Material Cast Iron
Bore Diameter 93.010 - 0.0075 mm (3.6619 - 0.0003 in.)
Out of Round (MAX) 0.076 mm (0.003 in.)
Taper (MAX) 0.051 mm (0.002 in.)
PISTONS
Material Aluminum Alloy
Diameter 92.975 mm (3.6605 in.)
Weight 367.5 grams (12.96 ounces)
Ring Groove Diameter
No. 1 83.03 - 83.73 mm (3.269 - 3.296 in.)
No. 2 82.033 - 83.833 mm (3.261 - 3.310 in.)
No. 3 83.08 - 84.88 mm (3.302 - 3.310 in.)
PISTON PINS
Type Pressed Fit
Clearance In Piston 0.010 - 0.019 mm (0.0004 - 0.0008 in.)
Diameter 24.013 - 24.016 mm (0.9454 - 0.9455 in.)
PISTON RINGS
Ring Gap
Compression Rings 0.37 - 0.63 mm (0.0146 - 0.0249 in.)
Oil Control (Steel Rails) 0.25 - 0.76 mm (0.0099 - 0.30 in.)
Side Clearance
Top Compression Ring 0.051 - 0.094 mm (0.0020 - 0.0037 in.)
2nd Compression Ring 0.040 - 0.080 mm (0.0016 - 0.0031 in.)
Oil Ring (Steel Ring) 0.019 - 0.229 mm (0.0007 - 0.0091 in.)
Ring Width
Compression Rings 1.472 - 1.490 mm (0.057 - 0.058 in.)
Oil Ring (Steel Rails) 0.445 - 0.470 mm (0.017 - 0.018 in.)
CONNECTING RODS
Bearing Clearance 0.010 - 0.048 mm (0.0004 - 0.0019 in.)
Side Clearance 0.10 - 0.35 mm (0.004 - 0.0138 in.)
Piston Pin Bore Diameter (Interference Fit) 0.022 - 0.045 mm (0.0009 - 0.0018 in.)
Bearing Bore Out-of-Round (MAX) 0.004 mm (0.0002 in.)
Total Weight (Less Bearing) 555 grams (19.5771 ounces)
CRANKSHAFT
Main Bearing Journal
Diameter 63.488 - 63.512 mm (2.4996 - 2.5005 in.)
Bearing Clearance 0.018 - 0.052 mm (0.0008 - 0.0021 in.)
Out-of-Round (MAX) 0.005 mm (0.0002 in.)
Taper (MAX) 0.008 mm (0.0004 in.)
End Play
Standard 0.052 - 0.282 mm (0.0021 - 0.0112 in.)
Maximum 0.282 mm (0.0112 in.)
Connecting Rod Journal
Diameter 50.992 - 51.008 mm (2.0076 - 2.0082 in.)
Bearing Clearance 0.015 - 0.055 mm (0.0006 - 0.0022 in.)
Out-of-Round (MAX) 0.005 mm (0.0002 in.)
Taper (MAX) 0.008 mm (0.0004 in.)
CAMSHAFT
Bore Diameter 26.02 - 26.04 mm (1.0245 - 1.0252 in.)
Bearing Journal Diameter 25.975 - 25.995 mm (1.0227 - 1.0235 in.)
Bearing Clearance
Standard 0.025 - 0.065 mm (0.001 - 0.0026 in.)
Maximum 0.065 mm (0.0026 in.)
End Play
Standard 0.075 - 0.200 mm (0.003 - 0.0079 in.)
Maximum 0.200 mm (0.0079 in.)
VALVE TIMING
Intake
Opens 3.6 °ATDC
Closes 247.1 °ATDC
Duration 243.5 °
Exhaust
Opens 232.5 °BTDC
Closes 21.2 °BTDC
Duration 253.7 °
Valve Overlap 17.6 °
VALVES
Face Angle 45 - 45.5 °
Head Diameter
Intake 48.52 - 48.78 mm (1.9103 - 1.9205 in.)
Exhaust 36.87 - 37.13 mm (1.4516 - 1.4618 in.)
Length (Overall)
Intake 113.45 - 114.21 mm (4.4666 - 4.4965 in.)
Exhaust 114.92 - 115.68 mm (4.5244 - 4.5543 in.)
Stem Diameter
Intake 6.931 - 6.957 mm (0.2729 - 0.2739 in.)
Exhaust 6.902 - 6.928 mm (0.2717 - 0.2728 in.)
Stem-to-Guide Clearance
Intake 0.018 - 0.069 mm (0.0008 - 0.0028 in.)
Exhaust 0.047 - 0.098 mm (0.0019 - 0.0039 in.)
Maximum Allowable Stem-to-Guide Clearance (Rocking Method)
Intake 0.069 mm (0.0028 in.)
Exhaust 0.098 mm (0.0039 in.)
Valve Lift (Zero Lash)
Intake 11.25 mm (0.443 in.)
Exhaust 10.90 mm (0.4292 in.)
VALVE SPRINGS
Free Length (Approximately)
Intake and Exhaust 48.6 mm (1.9134 in.)
Spring Force (Valve Closed)
Intake and Exhaust 315.5 - 352.5 N @ 40.89 mm
(70.92722 - 79.24515 lbs. @ 1.6099 in.)
Spring Force (Valve Open)
Intake and Exhaust 786.0 - 860.0 N @ 29.64 mm
(176.6998 - 193.3357 lbs. @ 1.167 in.)
Number of Coils
Intake and Exhaust 6.69
Wire Diameter
Intake and Exhaust 4.2799 - 4.3561 mm (0.1685 - 0.1715 in.)
Installed Height (Spring Seat to Bottom of Retainer)
Nominal Intake 40.97 mm (1.613 in.)
Exhaust 40.81 mm (1.606 in.)
CYLINDER HEAD
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.)
OIL PUMP
Clearance Over Rotors/End Face (MAX) 0.035 - 0.095 mm (0.0014 - 0.0038 in.)
Cover Out-of-Flat (MAX) 0.025 mm (0.001 in.)
Inner and Outer Rotor Thickness 12.02 mm (0.4731 in.)
Outer Rotor Clearance (MAX) 0.235 mm (0.0093 in.)
Outer Rotor Diameter (MIN) 85.925 mm (0.400 in.)
Tip Clearance Between Rotors (MAX) 0.150 mm (0.006 in.)
OIL PRESSURE
At Curb Idle Speed (MIN) * 25 kPa (4 psi)
@ 3000 rpm 170 - 758 kPa (25 - 110 psi)
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 rpm.