Complete Engine Specifications
| Type | In-Line OHV, SOHC | ||
| Number of Cylinders | 4 | ||
| Displacement | 122 cu. inch | ||
| Bore | 3.445 inch | ||
| Stroke | 3.268 inch | ||
| Compression Ratio | 9.8:1 | ||
| Firing Order | 1-3-4-2 | ||
| Compression Pressure | 170 - 225 psi | ||
| Max. Variation Between Cylinders | 25% | ||
| Cylinder Block | Cylinder Bore Diameter | 3.4446 - 3.4452 inch | |
| Out-of-Round (Max.) | 0.002 inch | ||
| Taper (Max.) | 0.002 inch | ||
| Pistons | Piston Diameter | 3.4432 - 3.4439 inch | |
| Clearance @ 10.42mm (0.42 inch) from bottom of skirt | 0.0008 - 0.0020 inch | ||
| Weight | 11.29 - 11.60 oz. | ||
| Land Clearance Diametrical | 0.0299 - 0.0312 inch | ||
| Piston Length | 2.197 inch | ||
| Piston Ring Groove Depth No. 1 | 0.157 - 0.165 inch | ||
| Piston Ring Groove Depth No. 3 | 0.176 - 0.184 inch | ||
| Piston Ring Groove Depth No. 3 | 0.151 - 0.163 inch | ||
| Piston Pins | Clearance in Piston | 0.0003 - 0.0006 inch | |
| Clearance in Connecting Rod | Interference | ||
| Diameter | 0.8268 - 0.8269 inch | ||
| End Play | None | ||
| Length | 2.943 - 2.963 inch | ||
| Piston Rings | Ring Gap-Top Compression Ring | 0.009 - 0.020 inch | |
| Wear Limit | 0.031 inch | ||
| Ring Gap-2nd Compression Ring | 0.019 - 0.031 inch | ||
| Wear Limit | 0.039 inch | ||
| Ring Gap-Oil Control Steel Rails | 0.009 - 0.026 inch | ||
| Wear Limit | 0.039 inch | ||
| Ring Side Clearance-Compression Rings | 0.0010 - 0.0026 inch | ||
| Wear Limit | 0.004 inch | ||
| Ring Side Clearance-Oil | 0.0002 - 0.0070 inch | ||
| Ring Width- Compression Rings | 0.046 - 0.047 inch | ||
| Ring Width-Oil Ring Pack | 0.1124 - 0.1184 inch | ||
| Connecting Rod | Bearing Clearance | 0.001 - 0.0023 inch | |
| Wear Limit | 0.003 inch | ||
| Bore Diameter-Piston Pin | 0.8252 - 0.8260 inch | ||
| Bore Diameter-Crankshaft End | 2.0075 - 2.0081 inch | ||
| Side Clearance | 0.005 - 0.015 inch | ||
| Wear Limit | 0.016 inch | ||
| Weight-Total (Less Bearing) | 19.36 +/- 0.25 oz. | ||
| Crankshaft | Connecting Rod Journal Diameter | 1.8894 - 1.8900 inch | |
| Main Bearing Journal Diameter | 2.0469-2.0475 inch | ||
| Journal Out-of-Round (Max.) | 0.0001 inch | ||
| Journal Taper (Max.) | 0.0001 inch | ||
| End Play | 0.0035 - 0.0094 inch | ||
| Wear Limit | 0.015 inch | ||
| Main Bearing Diametrical Clearance | 0.0008 - 0.0024 inch | ||
| Rocker Arm Shaft | Rocker Arm Shaft Diameter | 0.7861 - 0.7868 inch | |
| Rocker Arm Shaft Retainers | Intake-Width | 1.1193 - 1.1217 inch | |
| Exhaust-Width 1 & 5 | 1.1477 - 1.1516 inch | ||
| Exhaust-Width 2,3, and 4 | 1.5906 - 1.5945 inch | ||
| Rocker Arm/Hydraulic Lash Adjuster | Rocker Arm Inside Diameter | 0.787 - 0.788 inch | |
| Rocker Arm Shaft Clearance | 0.0006 - 0.0021 inch | ||
| Body Diameter | 0.9035 - 0.9040 inch | ||
| Plunger Travel Minimum (Dry) | 0.087 inch | ||
| Dry Lash-Intake | 0.039 inch | ||
| Dry Lash-Exhaust | 0.055 inch | ||
| Rocker Arm Ratio | 1.4 to 1 | ||
| Cylinder Head Camshaft Bearing Diameter | Journal N0.1 | 1.622 - 1.6228 inch | |
| Journal No.2 | 1.637 - 1.638 inch | ||
| Journal No.3 | 1.653 - 1.654 inch | ||
| Journal No.4 | 1.669 - 1.670 inch | ||
| Journal No.5 | 1.685 - 1.6858 inch | ||
| Camshaft | Journal Diameter | No.1 | 1.619-1.6199 in. |
| No.2 | 1.634 - 1.635 inch | ||
| No.3 | 1.650 - 1.651 inch | ||
| No.4 | 1.666 - 1.668 inch | ||
| No.5 | 1.682 - 1.6829 inch | ||
| Bearing Clearance- Diametrical | 0.0021 - 0.0037 inch | ||
| Bearing Clearance (Max. Allowable) | 0.0047 inch | ||
| End Play | 0.002 - 0.015 inch | ||
| Lift (Zero Lash) Standard Engine | Intake | 0.283 inch | |
| Exhaust | 0.277 inch | ||
| Lift (Zero Lash)-High Output R/T Engine | Intake | 0.335 inch | |
| Exhaust | 0.315 inch | ||
| Exhaust Valve Timing" Standard Engine *All readings in crankshaft degrees, at 0.5 mm (0.019 inch) of valve lift. | Closes (ATDC) | 5.4° | |
| Opens (BBDC) | 43.7° | ||
| Duration | 229.1° | ||
| Exhaust Valve Timing" High Output R/T Engine *All readings in crankshaft degrees, at 0.5 mm (0.019 inch) of valve lift. | Closes (ATDC) | 2.8° | |
| Opens (BBDC) | 45.7° | ||
| Duration | 228.6° | ||
| Intake Valve Timing* Standard Engine *All readings in crankshaft degrees, at 0.5 mm (0.019 inch) of valve lift. | Closes (ABDC) | 41.1° | |
| Opens (ATDC) | 13.9° | ||
| Duration | 207.2° | ||
| Valve Overlap | None | ||
| Intake Valve Timing* High Output R/T Engine *All readings in crankshaft degrees, at 0.5 mm (0.019 inch) of valve lift. | Closes (ABDC) | 45.8° | |
| Opens (ATDC) | 12.6° | ||
| Duration | 213.2° | ||
| Valve Overlap | None | ||
| Cylinder Head | Material | Cast Aluminum | |
| Gasket Thickness (Compressed) | 0.045 inch | ||
| Valve Seat | Angle | 45° | |
| Seat Diameter-Intake | 1.299 inch | ||
| Seat Diameter-Exhaust | 1.102 inch | ||
| Runout (Max.) | 0.002 inch | ||
| Valve Seat Width-Intake And Exhaust | 0.035 - 0.051 inch | ||
| Service Limit-Intake | 0.079 inch | ||
| Service Limit-Exhaust | 0.098 inch | ||
| Valve Guide | Diameter I.D. | 0.235 - 0.236 inch | |
| Guide Bore Diameter | 0.4330 - 0.4338 inch | ||
| Guide Height (spring seat to Guide Tip) | 0.521 - 0.541 inch | ||
| Valves | Face Angle Intake and Exhaust | 45 - 45.5° | |
| Head Diameter-Intake | 1.303 - 1.313 inch | ||
| Head Diameter-Exhaust | 1.124 - 1.135 inch | ||
| Valve Margin | Intake | 0.0452 - 0.0583 inch | |
| Service Limit | 0.0312 inch | ||
| Exhaust | 0.058 - 0.071 inch | ||
| Service Limit | 0.0469 inch | ||
| Valve Length (Overall) | Intake | 4.503 - 4.523 inch | |
| Exhaust | 4.603 - 4.623 inch | ||
| Valve Stem Tip Height | Intake | 1.76 - 1.80 inch | |
| Exhaust | 1.71 - 1.75 inch | ||
| Valve Stem Diameter | Intake | 0.2337 - 0.2344 inch | |
| Exhaust | 0.2326 - 0.2333 inch | ||
| Valve Stem to Guide Clearance | Intake | 0.0018 - 0.0025 inch | |
| Max. Allowable | 0.003 inch | ||
| Exhaust | 0.0029 - 0.0037 inch | ||
| Max. Allowable | 0.004 inch | ||
| Valve Springs - Standard Engine | Free Length (Approx.) | 1.84 inch | |
| Nominal Force (Valve Closed) | 70 lbs. @ 1.57 inch | ||
| Nominal Force (Valve Open) | 160 lbs. @ 1.28 inch | ||
| Installed Heigh | 1.580 inch | ||
| Valve Springs - High Output R/T Engine | Free Length (Approx.) | 2.13 inch | |
| Nominal Force (Valve Closed) | 72 lbs. @ 1.57 inch | ||
| Nominal Force (Valve Open) | 167 lbs. @ 1.28 inch | ||
| Installed Height | 1.580 inch | ||
| Oil Pump | Clearance Over Rotors (Max.) | 0.004 inch | |
| Cover Out-of-Flat (Max.) | 0.003 inch | ||
| Inner Rotor Thickness | 0.301 inch | ||
| Outer Rotor Thickness | 0.301 inch | ||
| Outer Rotor Clearance | 0.015 inch | ||
| Outer Rotor Diameter | 3.148 inch | ||
| Tip Clearance Between Rotors (Max.) | 0.008 inch | ||
| Oil Pressure Relief Valve Spring-Free Length (Approx.) | 2.39 inch | ||
| Oil Pressure (NOTE: At Normal Operating Temperatures) | Pressure @ Curb Idle Speed* *If pressure is ZERO at idle, DO NOT run engine at 3000 RPM. | 4 psi | |
| Pressure @ 3000 RPM | 25 - 80 psi |