Need a Mitsubishi s4l service manual pdf with real factory data? This 334-page Mitsubishi engine service manual (OEM #47372931) covers the S4L2 and S4L in full. Inside: a complete clearance and specification section, page after page of torque tables, and detailed exploded views of every major assembly from cylinder head to crankshaft. The troubleshooting section pairs structured diagnostic procedures with test values, so you're chasing actual faults instead of swapping parts on a hunch. Torque the cylinder head bolts to 83.4–93.2 N·m and set your intake valve-to-guide clearance at 0.020–0.050 mm. Factory numbers, not forum estimates. Your engine is apart. Pull up the bookmarked section on your tablet, find the spec, and get it back together right.
What's Inside This Mitsubishi S4L/S4L2, Y361GT-Y364GT Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Rules | 5-7 | Standard Safety Precautions, Prevention of Injury, During Maintenance, Respect of the Environment |
| Basic Instructions - Important Notice Regarding Equipment Servicing | 8 | Batteries, Battery Clamp, Pipelines, Wires, Electronic Service Tool, Engine Electrical Equipment, Fuel System, Hydraulic System |
| Torque - Minimum Tightening Torques for Normal Assembly | 9-15 | Basic Instructions - Shop and Assembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fan belt deflection | 10 - 12 mm (0.39 - 0.47 in) with a force of 98 N (22 lb) | p. 275 |
| Cylinder head bolt torque | 83.4 - 93.2 N·m (61.5 - 68.7 lb ft) | p. 69 |
| Oil pressure switch torque | 7.85 - 11.8 N·m (5.8 - 8.7 lb ft) | p. 295 |
| Valve stem outside diameter - Intake (Standard) | 6.565 - 6.580 mm (0.2585 - 0.2591 in) | p. 29 |
| Clearance between intake valve and guide (Standard) | 0.020 - 0.050 mm (0.0008 - 0.0020 in) | p. 29 |
| Pinion gap | 0.5 - 2.0 mm (0.020 - 0.079 in) | p. 308 |
| Plunger outside diameter | 6.0 mm (0.24 in) | p. 187 |
| Cam lift | 7 mm (0.28 in) | p. 187 |
| Speed governing type | Centrifugal weight system | p. 223 |
| Torque spring set special nut torque | 14.7 - 24.5 N·m (10.8 - 18.1 lb in) | p. 228 |
| M008T70471A | ||
| Starter output | 12 V - 2.0 kW | p. 299 |
| S4L, S4L2 | ||
| Relief valve opening pressure | 0.3 - 0.4 MPa (42 - 57 psi) | p. 251 |
Mitsubishi S4L/S4L2, Y361GT-Y364GT Common Problems This Manual Covers
Mitsubishi S4L2 engine bearings seize after sudden oil pressure drop during operation
Check oil level immediately — capacity is 5.0 l (1.3 US gal) including filter. Inspect the relief valve; opening pressure spec is 0.3 - 0.4 MPa (42 - 57 psi) on page 251. Verify the oil pressure switch is torqued to 7.85 - 11.8 N·m (5.8 - 8.7 lb ft). Review the full lubrication troubleshooting tree before restarting.
Manual Section: Engine Problem SolvingEngine overheats, temperature climbs well above normal operating range p. 57
Inspect the fan belt first — deflection must be 10 - 12 mm (0.39 - 0.47 in) under 98 N (22 lb) of force per page 275. Check coolant level against the 2.5 l (0.7 US gal) capacity spec. Verify thermostat opens at 76.5 °C (169.7 °F); if the inlet-to-outlet temperature difference exceeds 60 °C (140 °F) per the diagnostic threshold on page 57, suspect a failed thermostat or blocked water passages. Reduce load immediately if overheating persists.
Manual Section: Engine Overheat TestingCylinder head cracks after topping up coolant on a freshly stopped hot engine p. 69
Never add coolant to a hot engine. Let it cool below 50 °C before opening the system. When reassembling the head after any gasket replacement, torque cylinder head bolts (M10 x 1.75) to 83.4 - 93.2 N·m (61.5 - 68.7 lb ft) in the correct sequence per page 69. Refill to the 2.5 l (0.7 US gal) capacity and bleed air from the system before restarting.
Manual Section: Service ProceduresEngine cranks but won't start, or starts hard in cold conditions
Work through the starting system test: verify glow plug function, check fuel flow to the injection pump, then confirm injection timing is set to 19° BTDC per page 207. Test compression at 290 RPM — should read 29 bar (421 psi) or above. If the starter spins weakly, check pinion gap is within 0.5 - 2.0 mm (0.020 - 0.079 in) and mounting nuts are torqued to 9.81 - 11.8 N·m (7.2 - 8.7 lb ft) per page 309.
Manual Section: Engine Starting System - TestingLoss of power and excessive black smoke under load
Start with the low output and black smoke checklists. Verify injection timing at 19° BTDC (page 207) and check nozzle opening pressure against the 13.73 MPa (1992 psi) nominal spec on page 186. Inspect inlet valve stem clearance in the guide — standard is 0.020 - 0.050 mm (0.0008 - 0.0020 in) per page 29. Run a compression test; below 29 bar (421 psi) at 290 RPM points to worn cylinders or valve seating issues.
Manual Section: Fuel Injection System - Low Output TestingRough idle, surging speed, or engine hunts at low RPM
Check the idling malfunction procedure. Inspect governor linkage for wear or binding — the centrifugal weight system spec is on page 223. Verify idle speed and valve clearance settings are within spec, then test injection nozzle pressure at 13.73 MPa (1992 psi). If the torque spring set nut was disturbed, retorque to 14.7 - 24.5 N·m (10.8 - 18.1 lb in) per page 228 before re-calibrating the governor.
Manual Section: Fuel Injection System - Idling Malfunction TestingFrequently Asked Questions
What are the torque specs for the head bolts on Mitsubishi S4L2?
The cylinder head bolts should be torqued to 83.4 - 93.2 N·m (61.5 - 68.7 lb ft). This procedure should be followed in the numerical sequence shown in the image on page 69.
How to reset fuel injection timing after overhaul on Mitsubishi S4L2?
To adjust the fuel injection timing, increase or decrease the thickness of the fuel injection pump adjusting shim. A change in shim thickness by 0.1 mm (0.004 in) results in a change in the fuel injection timing by approximately 1°. Shims from 0.2 - 1.0 mm (0.008 - 0.039 in) are available. Adding shims retards the timing, while removing shims advances it.
What are the replacement specifications for Fan belt?
When installing a new fan belt, operate the engine at idle speed for 5 - 10 minutes. Afterward, re-adjust the belt tension to achieve a deflection of approximately 10 - 12 mm (0.39 - 0.47 in) when a force of 98 N (22 lb) is applied between the alternator and crankshaft pulleys.
What are the replacement specifications for Cylinder head gasket?
When replacing the cylinder head gasket, a new gasket should be used. Ensure the new gasket is placed on the cylinder block, aligning it with the guide bolts. The model name is stamped on the front top face of the gasket to prevent confusion with other models.
Is this Service Manual a digital download?
A 334-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this Mitsubishi S4L2 & variants Service Manual printable?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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