Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Spark plug | Clearance 0.35 mm | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Power Solutions International 10L & 10L Turbo is an engine. It powers generator sets from Weichai, including the 10L Turbo.
Also known as: Power Solutions International (PSI) 10L & 10L Turbo
Compiled from service & troubleshooting documentation across every generator set that uses the Power Solutions International 10L & 10L Turbo.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Spark plug | Clearance 0.35 mm | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Camshaft axial clearance | 0.1~0.4 | mm | |
| Clearance | Required valve sinkage - exhaust valve | -0.22~0.22 | mm | |
| Clearance | Required valve sinkage - intake valve | -0.2~0.2 | mm | |
| Clearance | Speed sensor to signal generator fluted disc clearance | 0.5-0.15 | mm | |
| Clearance | Valve guide inside diameter (permissible) | 9.0~9.015 | mm | |
| Gap | Spark plug (ignition plug) clearance | 0.35 | mm | |
| Other | Valve timing - exhaust valve closes | 34±5 | ° after TDC | engine cold |
| Other | Valve timing - exhaust valve opens | 49±5 | ° before BDC | engine cold |
| Other | Valve timing - intake valve closes | 34±5 | ° after BDC | engine cold |
| Other | Valve timing - intake valve opens | 21±5 | ° before TDC | engine cold |
| Pressure | NG inlet pressure | 2.5 | kpa | |
| Speed | Alternator no-load speed (recommended) | >1600 | rpm | |
| Torque | Connecting rod bolts | 120 Nm then 90°±5° to 170Nm~250 Nm | Nm | |
| Torque | Cylinder head auxiliary bolt nuts (after 90° rotation) | 120~160 | Nm | |
| Torque | Cylinder head auxiliary bolts | 76~102 | Nm | |
| Torque | Cylinder head auxiliary nuts | 100 | Nm | |
| Torque | Cylinder head cover bolts | 10-15 | Nm | |
| Torque | Cylinder head main bolts | 200 | Nm | |
| Torque | Cylinder head main bolts (after 90° rotations) | 240~340 | Nm | |
| Torque | Cylinder head main bolts and auxiliary bolt nuts (initial) | 30~50 | Nm | |
| Torque | Flywheel bolts (auto-wrench) | 60Nm then 160°+5° to 230Nm~300Nm | Nm | |
| Torque | Flywheel bolts (hand tightening) | 60Nm then 90°±5° twice to 230Nm~280Nm | Nm | |
| Torque | Gear chamber fastening bolts | 44～58 | N.m | |
| Torque | Hexagon bolt (Grade 10.9) | 29Nm~35Nm | Nm | |
| Torque | Hexagon bolt (Grade 8.8) | 22Nm~29Nm | Nm | |
| Torque | Ignition plug | 25-28 | nm | |
| Torque | Ignition winding clamp plate bolt (final) | 20-25 | Nm | |
| Torque | Ignition winding clamp plate bolt (first) | 15 | Nm | |
| Torque | Intake/exhaust valve adjusting nut | 45±5 | Nm | |
| Torque | Main bearing bolts | 265Nm±25Nm | Nm | |
| Torque | Main bearing bolts (crankshaft assembly, final) | 250Nm~280Nm | Nm | |
| Torque | Oil sump fastening bolts | 22～29 | N.m | |
| Torque | Piston nozzle hollow bolt | 20～30 | N.m | |
| Torque | Signal generator cover M6 hexagon bolt | 8-10 | Nm | |
| Torque | Signal generator speed sensor M6 hexagon bolts | 8-10 | Nm | |
| Torque | Signal generator timing gear M22 hexagon bolts | 290-310 | Nm | |
| Torque | Signal generator to timing gear housing M10 bolt | 39-46 | Nm | |
| Valve clearance | Exhaust valve clearance | 0.58±0.03 | mm | engine cold |
| Valve clearance | Intake valve clearance | 0.38±0.03 | mm | engine cold |
| Voltage | Alternator output voltage (indicator normal) | 27~28.5 | V |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | Natural Gas | NG inlet pressure 2.5 kPa |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
⚠ Measure and adjust while the engine is cold
Tools: feeler gauge, torque wrench
⚠ Drain the oil before disassembly of oil sump
Tools: sleeve wrench, copper hammer
⚠ ENGINE MUST be barred over three complete rotations before starting once new cylinder heads are installed
Tools: torque wrench, rubber hammer
⚠ If prescribed torque not reached, replace bolt with new one; bolt can be used twice
Tools: torque wrench
⚠ Mark pistons G1-G5 by weight; pistons of same weight group must not be misinstalled
Tools: circlip pliers, piston ring pliers, torque wrench
⚠ Valve stem sealing sleeve cannot be reused once removed
Tools: special tooling, pliers
⚠ Tighten main bearing bolts symmetrically per sequence; apply clean lubricating oil to bearing surface and bolt threads
⚠ Main bearing bolts can be reused 6 times; bolt extension length less than 172 mm
Tools: socket wrench, copper hammer
Tools: sleeve wrench, copper hammer
Tools: wrench, sleeve
Tools: ignition plug wrench
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The Power Solutions International 10L & 10L Turbo powers 1 generator set(s), including Weichai 10L Turbo.
A commonly reported issue on generators using the Power Solutions International 10L & 10L Turbo is: Voltmeter shows high voltage. Fix: Test the voltage at alternator terminal B+ and it should be usually(27~28.4) V. A normal voltage indicates a larger voltmeter calibration value error, and repair or replacement is required..