Description:
4-134 L Engine illustration shown for reference only - click here to shop for these parts by interactive diagram
Looking for Engine parts for your vintage Willys or Jeep? Search Engine by Category or by Diagram
| Engine Specs: | |
|---|---|
| Type | L-Head |
| Number of Cylinders | 4 |
| Bore | 3 1/8" |
| Stroke | 4 3/8" |
| Piston Displacement | 134.2 cu. In. |
| Bore Spacing (center to center): | |
| 1 and 2, 3 and 4 | 3.437" |
| 2 and 3 | 4.938" |
| Firing Order | 1-3-4-2 |
| Compression Ratio | 7.00:1 |
| Compression Pressure | 90 to 110 psi. |
| Number of Mountain Points: | |
| Front | 2 |
| Rear | 1 |
| Horsepower (SAE) | 15.63 |
| Horsepower (Max. Brake) | 60@4000 rpm. |
| Maximum Torque @ 2000 rpm | 105 lb-ft. |
| Idle Speed | 600 rpm. |
| Piston Specs: | |
| Material | Aluminum Alloy |
| Description | Cam Ground, T-Slot, Tin or Brass Plated |
| Length | 3 3/4" |
| Diameter (near bottom of skirt; right angle to pin) | 3.1225: - 3.1245" |
| Weight | 13.5 oz. |
| Clearance Limits: | |
| Piston-To-Cylinder Bore | Selective Feeler Fit |
| Ring Groove Depth: | |
| No. 1 and 2 Ring | .1593" to .1655" |
| No. 3 Ring | .1693" to .1755" |
| No. 1 Ring | .0955" to .0965" |
| No. 2 Ring | .095" to .096" |
| No. 3 Ring | .1875" to .1885" |
| Piston Pin Hole Bore | .8120" to .8122" |
| Cylinder Bore: | |
| Standard | 3.125" to 3.127" |
| max. out of round | .005" |
| max. taper | .005" |
| max. rebore | .040" |
| Piston Ring Specs: | |
| Function: | |
| No. 1 and 2 | Compression |
| No. 3 | Oil |
| Material: | |
| No. 1 | Cast Iron, Chrome-plated Face |
| No. 2 and 3 | Cast Iron |
| Width: | |
| No. 1 and 2 | 3/32" |
| No. 3 | 3/16" |
| Side Clearance in Groove: | |
| No. 1 Ring | .002" to .004" |
| No. 2 Ring | .0015" to .0035" |
| No. 3 Ring | .001" to .0025" |
| Connecting Rod Specs: | |
| Material | SAE 1141 Forged Steel |
| Length (center to center) | 9.187" |
| Bearing: | |
| Type | Removable |
| Material | Steel-backed Babbitt |
| Length Over All | 1.089" to 1.099" |
| Clearance Limits | .001" to .0019" |
| Undersize Bearings Available: | .001" |
| .002" | |
| .010" | |
| .012" | |
| .020" | |
| .030" | |
| End Play | .004" to .010" |
| Out-of-round and out-of-taper limits | .001" |
| Installation | From Above |
| Bore: | |
| Upper | .8115" to .8125" |
| Lower | 2.0432" to 2.0440" |
| Crankshaft Specs: | |
| Material | SAE 1040 Forged Steel |
| End Thrust | Front Bearing |
| End Play | .004" to .006" |
| Main Bearings | |
| Type | Removeable |
| Material | Steel-backed Babbitt |
| Clearance | .0003" to .0029" |
| Journal Diameter | 2.3331" to 2.3341" |
| Undersize Bearings Available: | .001" |
| .002" | |
| .010" | |
| .012" | |
| .020" | |
| .030" | |
| Bearing Length: | |
| Front | 1.64" |
| No. 2 | 1.72" |
| No. 3 | 1.66" |
| Out-of-round and out-of-taper limits | .001" |
| Direction of Cylinder Offset | Right |
| Amount of Cylinder Offset | .125" |
| Crankpin Journal Diameter | 1.9375" to 1.9383" |
| Flywheel Run Out (max.) | .005" |
| Camshaft Specs: | |
| Material | Steel-backed Babbitt |
| Number | 4 |
| Clearance | .001" - .0025" |
| Journal Diameter: | |
| Front | 2.1860" to 2.1855" |
| Front Intermediate | 2.1225" to 2.1215" |
| Rear Intermediate | 2.0600" to 2.0590" |
| Rear | 1.6230" to 1.6225" |
| Bearing Diameter: | |
| Front | 2.1870" to 2.1890" |
| Front Intermediate | 2.125" to 2.126" |
| Rear Intermediate | 2.0625" to 2.0635" |
| Rear | 1.625" to 1.626" |
| End Play | .004" to .007" |
| Drive Type | Gear |
| Crankshaft Gear | Cast Iron |
| Camshaft Gear | Pressed Fiber-Steel Hub |
| Valve System Specs: | |
| Clearane-Cold: | |
| Intake | .016" |
| Exhaust | .016" |
| Clearance for Timing (intake) | .020" |
| Over All Length: | |
| Intake | 2 7/8" |
| Exhaust | 2 7/8" |
| Stem Diameter | .6245" to .6240" |
| Clearance in Block | .0005" to .002" |
| Timing: | |
| Intake | |
| Opens | 9° BTC |
| Closes | 50° ABC |
| Duration | 239° |
| Exhaust | |
| Opens | 47° BBC |
| Closes | 12° ATC |
| Duration | 239° |
| Valve Opening Overlap | 21° |
| Valves: | |
| Intake | |
| Material | SAE 5150 |
| Length Over All | 5.797" |
| Head Diameter | 1.531" |
| Angle of Seat | 45° |
| Stem Diameter | .373" |
| Stem-to-Guide Clearance | .0007" to .0022" |
| Lift | .351" |
| Exhaust | |
| Material | Uniloy 21-12 |
| Length Over All | 5.797" |
| Head Diameter | 1.47" |
| Angle of Seat | 45° |
| Seat Insert Material | Eatonite EMS 58 |
| Stem Diameter | .371" to .372" |
| Stem-to-Guide Clearance | .0025" to .0045" |
| Lift | .351" |
| Springs: | |
| Free Length | 2 1/2" |
| Pressure @ Length: Standard: | |
| Valve Closed | 53 lb. @ 2.109" |
| Valve Open | 120 lb. @ 1.750" |
| Service Minimum | |
| Valve Closed | 47 lb. @ 2 7/64" |
| Valve Open | 110 lb. @ 1 3/4" |
| Lubrication Specs: | |
| Type of Lubrication: | |
| Main Bearings | Pressure |
| Connecting Rods | Pressure |
| Piston Pins | Splash |
| Camshaft Bearings | Pressure |
| Tappets | Splash |
| Timing Gears | Nozzle |
| Cylinder Walls | Nozzle |
| Oil Pump: | |
| To Engine S/N 44417: | |
| Type | Planetary Gear |
| Drive | Camshaft Gear |
| Minimum Save Oil Pressure @ Idle | 10 psi. |
| Relief Valve Opens | 25 psi. |
| Normal Gauge Reading | 50 @ 30 mph. |
| Engine S/N 44417 and On: | |
| Type | Internal Rotor |
| Drive | Camshaft Gear |
| Minimum Save Oil Pressure @ Idle | 6 psi. |
| At 2000 rpm. (35 mph.) | 20 psi. |
| Relief Valve Opens | 40 psi. |
| Normal Oil Pressure | 35 psi. @ 2000 rpm. |
| Oil Pressure Sending Unit | Electric |
| Oil Intake | Floating |
| Oil Filter System | Partial Flow |
* Learn more about the 4-134 L engine from the Master Parts List Manual for 50-52 M38
