Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM1982MIRADA 3.7L ENG VIN EREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL3.7 LITER 6-CYLINDERENGINE SPECIFICATIONS
1982 Dodge and Ram Mirada 3.7L Eng VIN E
Engine Specifications
1982 Dodge and Ram Mirada 3.7L Eng VIN ESECTION Engine Specifications
GENERAL SPECIFICATIONS
| Engine | HP at RPM | Torque (Ft. Lbs. at RPM) | Compr. Ratio | Bore | Stroke | ||
|---|---|---|---|---|---|---|---|
| in. | mm | in. | mm | ||||
| 3.7L (225") | 85@3600 | 165@1600 | 8.4:1 | 3.40 | 86 | 4.12 | 10 |
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) | |
|---|---|---|---|---|---|---|---|---|
| 3.7L (225") | ||||||||
| Intake | 1.615-1.625 (41.02-41.27) | 45° | 45° | .070-.090 (.12-.28) | .372-.373 (9.44-9.47) | .001-.003 (.02-.07) | .378 (9.60) | |
| Exhaust | 1.355-1.365 (34.41-34.67) | 43° | 45° | .040-.060 (1.01-1.52) | .371-.372 (9.42-9.44) | .002-.004 (.05-.10) | 378 (9.60) | |
VALVE SPRINGS
| Engine | Free Length In. (mm) | PRESSURE Lbs. @ In. (kg @ mm) | |
|---|---|---|---|
| Valve Closed | Valve Open | ||
| 3.7L (225") | 1.92 (48.7) | 49-57@26.0 (3-4@42) | 137-150@25.7 (9.6-10.5@33) |
VALVE TIMING
| Engine | INTAKE | EXHAUST | ||
|---|---|---|---|---|
| Open (BTDC) | Close (ABDC) | Open (BBDC) | Close (ATDC) | |
| 3.7L (225") | 6° | 42° | 36° | 12° |
PISTONS, PINS, RINGS
| Engine | PISTONS Clearance In. (mm) | PINS | RINGS | |||
|---|---|---|---|---|---|---|
| Piston Fit In. (mm) | Rod Fit In. (mm) | Rings | End Gap In. (mm) | Side Clearance In. (mm) | ||
| 3.7L (225") | .0005-.0015 (.012-.038) | .00035-.00085 (.0008-.0215) | .0007-.0017 (.017-.043) | 1 | .010-.020 (.02-.50) | .0015-.004 (.038-.10) |
| 2 | .010-.020 (.02-.50) | .0015-.004 (.038-.10) | ||||
| 3 | .015-.055 (.38-1.39) | .0002-.005 (.005-.127) | ||||
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) | |
| 3.7L (225") | 2.7495-2.7505 (69.837-69.862) | .0010-.0025 (.025-.063) | No. 3 | .0035-.0095 (.088-.241) | 2.1865-2.1875 (55.53-55.56) | .0010-.0025 (.002-006) | .007-.013 (.17-.33) |
CAMSHAFT
| Engine | Journal Diam. In. (mm) | Clearance In. (mm) | Lobe Lift In. (mm) | |
|---|---|---|---|---|
| 3.7L (225") | ||||
| No. 1 | 1.998-1.999 (50.74-50.77) | .001-.003 (.02-.07) | ..... | |
| No. 2 | 1.982-1.983 (50.34-50.36) | ..... | ||
| No. 3 | 1.967-1.968 (49.96-49.98) | ..... | ||
| No. 4 | 1.951-1.952 (49.55-49.58) | ..... | ||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.