Engine Specifications
GENERAL SPECIFICATIONS
| Year | Displacement | Fuel System | HP@RPM | Torque Ft. Lbs.@RPM | Compr. Ratio | Bore | Stroke | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Cu. In. | cc | In. | mm | In. | mm | |||||
| 1982 | 257.9 | 4230 | 2-Bbl. | 125@3600 | 200@1800 | 8.3:1 | 3.70 | 94 | 4.00 | 101.6 |
VALVES
| Engine Size & Valve | Head Diam. In. (mm) | Face Angle | Seat Angle | Seat Width In. (mm) | Stem Diameter In. (mm) | Stem Clearance In. (mm) (1) | Valve Lift In. (mm) | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 4230 cc | ||||||||||
| Intake | 1.81 (46.0) |
45.5° | 45° | .055 (1.4) |
.3138-.3144 (7.970-7.985) |
.0012-.0024 (.030-.060) |
..... ..... |
|||
| Exhaust | 1.48 (37.5) |
45.5° | 45° | .067 (1.7) |
.3134-.3140 (7.960-7.975) |
.0016-.0028 (.040-.071) |
..... | |||
|
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PISTONS, PINS, RINGS
| Engine | PISTONS | PINS | RINGS | |||
|---|---|---|---|---|---|---|
| Clearance In. (mm) | Piston Fit In. (mm) | Rod Fit In. (mm) | Ring No. | End Gap In. (mm) | Side Clearance In. (mm) | |
| 4230 cc | .0012-.0020 (.034-.050) | .0003-.0005 (.008-.012) | Locked in Rod | No. 1 | .0079-.0157 (.200-.400) | .0012-.0028 (.030-.071) |
| No. 2 | .0079-.0157 (.200-.400) | .0008-.0024 (.020-.060) | ||||
| Oil (NP) | .0079-.0197 (.200-.500) | .0016-.0075 (.040-.190) | ||||
| Oil (Riken) | .0118-.0354 (.30-.90) | .0016-.0075 (.040-.190) | ||||
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) | ||
| 4230 cc | ||||||||
| No. 1 | 2.6367-2.6376 (66.972-66.996) | .0008-.0017 (.020-.044) | No. 3 | .002-.006 (.06-.16) | 2.1252-2.1260 (53.98-54.00) | .0008-.0024 (.020-.060) | .004-.009 (.11-.23) | |
| No. 2 | 2.6957-2.6967 (68.472-68.496) | |||||||
| No. 3 | 2.7548-2.7557 (69.972-69.996) | |||||||
| No. 4 | 2.8139-2.8148 (71.472-71.496) | |||||||
VALVE SPRINGS
| Engine | Free Length In. (mm) | PRESSURE Lbs. @ In. (Kg @ mm) | |
|---|---|---|---|
| Valve Closed | Valve Open | ||
| 4230 cc | 2.028 (51.5) | 71@1.693 (32.5@43.0) | ..... |
CAMSHAFT
| Engine | Journal Diam. In. (mm) | Clearance In. (mm) | Lobe Lift In. (mm) | |
|---|---|---|---|---|
| 4230 cc | ||||
| No. 1 | 1.8810-1.8888 (47.777-47.975) | .001-.003 (.025-.075) | ..... | |
| No. 2 | 1.8289-1.8297 (46.455-46.475) | |||
| No. 3 | 1.7699-1.7707 (44.955-44.975) | |||
| No. 4 | 1.7108-1.7116 (43.455-43.475) | |||