4.7L Engine
WARNING: This page is about a different variant/trim than selected.
| GENERAL DESCRIPTION |
| DESCRIPTION |
SPECIFICATION |
| Engine Type |
90° SOHC V8 16-Valve |
| Displacement |
4.7 Liters / 4701 cc |
| |
287 (Cubic Inches) |
| Bore |
93.0 mm (3.66 in.) |
| Stroke |
86.5 mm (3.40 in.) |
| Compression Ratio |
9.0:1 |
| Max. Variation Between Cylinders |
25% |
| Horsepower |
235 BHP @ 4800 RPM |
| Torque |
295 LB-FT @ 3200 RPM |
| Lead Cylinder |
#1 Left Bank |
| Firing Order |
1-8-4-3-6-5-7-2 |
| CYLINDER BLOCK |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Bore Diameter |
93.010 ±.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 |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Diameter |
92.975 mm |
3.6605 in. |
| Weight |
366 grams |
12.9 oz |
| Ring Groove Diameter |
| No. 1 |
83.37 - 83.13 mm |
3.282 - 3.273 in |
| No. 2 |
82.833 - 83.033 mm |
3.261 - 3.310 in. |
| No. 3 |
83.88 - 84.08 mm |
3.302 - 3.310 in. |
| PISTON PINS |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| 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 |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Ring Gap |
| Top Compression Ring |
0.20 - 0.36 mm |
0.0079 - 0.0142 in. |
| Second Compression Ring |
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 |
.051 -.094 mm |
0.0020 - 0.0037 in. |
| Second Compression Ring |
0.040 - 0.080 mm |
0.0016 - 0.0031 in. |
| Oil Ring (Steel Ring) |
.019 -.229 mm |
.0007 -.0091 in. |
| Ring Width |
| Top Compression Ring |
1.472 - 1.490 mm |
0.057 - 0.058 in. |
| Second Compression Ring |
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 |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Bearing Clearance |
0.015 - 0.055 mm |
0.0006 - 0.0022 in. |
| Side Clearance |
0.10 - 0.35 mm |
0.004 - 0.0138 in. |
| Piston Pin Bore Diameter |
.025 -.048 mm |
- |
| |
(Interference Fit) |
0.001 - 0.0019 in. |
| Bearing Bore Out of Round (MAX) |
0.004 mm |
0.0002 in. |
| Total Weight (Less Bearing) |
555 grams |
19.5771 ounces |
| CRANKSHAFT |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Main Bearing Journal Diameter |
63.488 - 63.512 mm |
2.4996 - 2.5005 in. |
| Bearing Clearance |
0.004 - 0.034 mm |
0.0002 - 0.0013 in. |
| Out of Round (MAX) |
0.005 mm |
0.0004 in. |
| Taper (MAX) |
0.008 mm |
0.0004 in. |
| End Play |
0.052 - 0.282 mm |
0.0021 - 0.0112 in. |
| End Play (MAX) |
0.282 mm |
0.0112 in. |
| Connecting Rod Journal Diameter |
50.992 - 51.008 mm |
2.0076 - 2.0082 in. |
| Bearing Clearance |
0.010 - 0.048 |
0.0004 - 0.0019 in. |
| Out of Round (MAX) |
0.005 mm |
0.0002 in. |
| Taper (MAX) |
0.008 mm |
0.0004 in. |
| CAMSHAFT |
| DESCRIPTION |
SPECIFICATION |
| Metric |
Standard |
| Bore Diameter |
26.02 - 26.04 mm |
1.0245 - 1.0252 in. |
| Bearing Journal Diameter |
25.973 - 25.995 mm |
1.0227 - 1.0235 in. |
| Bearing Clearance |
0.025 - 0.065 mm |
0.001 - 0.0026 in. |
| Bearing Clearance (MAX) |
0.065 mm |
0.0026 in. |
| End Play |
.075 -.200 mm |
0.003 - 0.0079 in. |
| End Play (MAX) |
.200 mm |
0.0079 in. |
| VALVE TIMING |
| DESCRIPTION |
SPECIFICATION |
| Intake |
| Opens (BTDC) |
4.4° |
| Closes (ATDC) |
239.1° |
| Duration |
243.5° |
| Exhaust |
| Opens (BTDC) |
240.5° |
| Closes (ATDC) |
13.2° |
| Duration |
253.70° |
| Valve Overlap |
17.6° |
| VALVES |
| DESCRIPTION |
SPECIFICATION |
| 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) |
| 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.) |
| Max. 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 SPRING |
| DESCRIPTION |
SPECIFICATION |
| Free Length (Approx) |
| Intake |
49.0 mm (1.9291 in.) |
| Exhaust |
49.0 mm (1.9291 in.) |
| Spring Force (Valve Closed) |
| Intake and Exhaust |
313.0 - 354.0 N @ 40.12 mm
(70.365 - 79.582 lbs. @ 1.5795 in.) |
| Spring Force (Valve Open) |
| Intake and Exhaust |
776.0 - 870.0 N @ 28.88 mm
(174.451 - 195.583 lbs. @ 1.137 in.) |
| Number of Coils |
| Intake |
7.3 |
| Exhaust |
7.3 |
| Wire Diameter |
| Intake and Exhaust |
4.6 x 3.67 mm |
| - |
(0.1811 - 0.1445 in.) |
| Installed Height (Spring Seat to Bottom of Retainer) |
| Nominal |
| Intake |
40.12 mm (1.579 in.) |
| Exhaust |
40.12 mm (1.579 in.) |
| CYLINDER HEAD |
| DESCRIPTION |
SPECIFICATION |
| 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 |
| DESCRIPTION |
SPECIFICATION |
| Clearance Over Rotors/End Face (MAX) |
0.095 mm (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 to pocket (Diametral) clearance (MAX) |
.235 mm (.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 |
| SPECIFICATION |
SPECIFICATION |
| At Curb Idle Speed (MIN)* |
48 kPa (7 psi) |
| @ 3000 RPM |
240 - 725 kPa (35 - 105 psi) |
| * CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 RPM. |