Engine Specifications
GENERAL SPECIFICATIONS
| Year |
Displ. |
Carburetor |
HP at RPM |
Torque (Ft. Lbs. at RPM) |
Compr. Ratio |
Bore |
Stroke |
| cu. ins. |
cc |
in. |
mm |
in. |
mm |
| 1981 |
273 |
4474 |
Fuel Inj. |
220@5500 |
265@4000 |
9:1 |
3.74 |
95.0 |
3.11 |
78.9 |
VALVES
| Engine & Valve |
Head Diam. In. (mm) |
Face Angle |
Seat Angle |
Seat Width In. (mm) |
Stem Diameter In. (mm) |
Stem Clearance In. (mm) |
Valve Lift In. (mm) |
| 4474 cc |
|
|
|
|
|
|
|
| |
Intake |
1.692 (43) |
45° |
45° |
.067 (1.7) |
.3498 (8.97) |
.0010-.0020 (.030-.057) |
..... |
| Exhaust |
1.496 (38) |
45° |
45° |
.078 (2.0) |
.3490 (8.95) |
.0200-.0028 (.050-.077) |
..... |
| 1 - Limit.020" (.5 mm). |
PISTONS, PINS, RINGS
| Engine |
PISTONS |
PINS |
RINGS |
| Clearance In. (mm) |
Piston Fit In. (mm) |
Rod Fit In. (mm) |
Rings |
End Gap In. (mm) |
Side Clearance in. (mm) |
| 4474 cc |
.001-.002 (.024-.050) |
Interference |
.0007-.0012 (.019-.032) |
|
.008-.015 (.20-.40) |
.002-.003 (.050-.082) |
| 2 |
.008-.015 (.20-.40) |
.002-.003 (.050-.082) |
| 3 |
.015-.055 (.40-1.4) |
.0009-.0050 (.023-.137) |
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
| Engine |
MAIN BEARINGS |
CONNECTING ROD BEARINGS |
| Journal Diam. In. (mm) |
Clearance In. (mm) |
Thrust Bearing |
Crankshaft End Play In. (mm) |
Journal Diam. In. (mm) |
Clearance In. (mm) |
Side Play In. (mm) |
| 4474 cc |
2.754-2.755 (69.97-69.99) |
.0008-.0038 (.020-.098) |
No. 3 |
.0039-.0157 (.100-.400) |
2.046-2.047 (51.97-51.99) |
.001-.004 (.034-.092) |
.004-.016 (.10-.40) |
VALVE TIMING
| Engine |
INTAKE |
EXHAUST |
| Open (ATDC) |
Close (ABDC) |
Open (BBDC) |
Close (BTDC) |
| 4474 cc |
12° |
48° |
32° |
6° |
TIGHTENING SPECIFICATIONS
| Application |
Ft. Lbs. (N.m) |
| Cylinder Head Bolts |
| |
|
Step 1 |
14 (20) |
| Step 2 |
36 (50) |
| Step 3 |
61 (85) |
| Main Bearing Carrier |
| |
10 mm Bolt |
| |
|
Step 1 |
14 (20) |
| Step 2 |
29-33 (40-45) |
| |
12 mm Bolt |
| |
|
Step 1 |
14 (20) |
| Step 2 |
29 (40) |
| Step 3 |
44-47 (60-65) |
| Connecting Rod Nuts |
42-46 (58-63) |
| Camshaft Housing |
33 (45) |
| Flywheel |
69-73 (95-100) |
| Front Pulley |
181-188 (250-260) |
| Camshaft Pulley |
33 (45) |
| Oil Pump |
| |
|
Step 1 |
11 (15) |
| Step 2 |
14-16 (20-22) |
| Spark Plugs |
18-22 (25-30) |
| Oil Drain Plug |
44 (60) |