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Doosan P158LE Engine

The Doosan P158LE is a 14.62 L 8-cylinder turbo charged & intercooled engine rated at 1500 rpm, producing up to 322 kW. It powers generator sets from Doosan. It holds 21 L (5.5 gal) of oil and 20 L (5.3 gal) of coolant.

Also known as: Doosan Infracore (DHI) P158LE

14.618 L

Displacement

Cylinders

1500 rpm

Rated speed

322 kW

Gross power

On this pageSpecs Generator sets Maintenance FAQ Service intervals Torque & specs Fluids Procedures Wiring

Engine specifications

Oil capacity	21.0 L
Coolant capacity	20.0 L
Displacement	14.618 L
Cylinders	8
Aspiration	Turbo charged & intercooled
Rated speed	1500 rpm
Gross power	322 kW

Generator sets powered by this engine

Doosan P158LE

How to read your Doosan engine serial & model number →

Maintenance schedule

Item	Spec	Part #	Interval
Air filter		—	4000 hr
Fuel filter		—	400 hr
Oil filter		—	200 hr
Battery	Electrolyte specific gravity 1.12~1.28; 24 V - 200 AH	—
Belt	Deflection 10~15 mm when pressed with thumb	—	2000 hr
Coolant	Density inspected every 500 hours	—	500 hr
Oil	SAE 15W40, API CD or CE (initial factory fill API CH-4 break-in oil)	—	200 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Repair guides

Step-by-step procedures compiled from the Doosan service manual for this engine.

Service intervals

Item	Action	Hours	Months	Notes
Engine oil	Change	50 hr		First service — First 50 hrs then per table; halve interval if fuel sulfur > 0.02wt%
Oil filter	Replace	50 hr		First service — First 50 hrs then per table
Valve clearance	Adjust	50 hr		First service — After initial 50 hrs, when noise occurs or engine runs abnormally; otherwise if necessary
Fuel injection timing	Check	200 hr		When necessary
Fuel pre-filter	Clean	200 hr
Fuel strainer of fuel feed pump	Clean	200 hr		Clean every engine oil replacement; also after every 200 hours
Fuel-water separator	Drain	200 hr		Drain water in separator; section 2.2.10 states every 1,200 hours
Injection nozzles	Check	200 hr		When necessary
Lubricating oil	Change	200 hr		First service — First oil change at 50 hr operating
Oil filter cartridge	Replace	200 hr		First service — Replace simultaneously with engine oil change; first at 50 hr
Priming pump strainer	Clean	200 hr		Every 200 operating hours
Cylinder head bolts	Check	400 hr		Retighten by a further 90° (1/4 revolution)
Fuel filter	Replace	400 hr
Fuel filter element	Replace	400 hr		Section 2.2.23 states every 400 hours
Water separator filter	Replace	400 hr
Air cleaner element	Clean	600 hr		Renew every two years or 4,000 hours; clean up to 5 times
Intercooler air fins	Clean	600 hr
Compression pressure	Check	800 hr		When necessary
Fuel tank	Drain	800 hr		Remove sediment from fuel tank
Coolant	Change	1200 hr	12 mo	By regular inspection table; P126TI: 1,200 hrs or 6 months
Coolant water	Change	2000 hr		Change the coolant water
Radiator	Clean	2000 hr
Turbocharger	Clean	2000 hr
V-belt tension	Adjust	2000 hr		Section 5.8 states V-belt tension checked after every 2,000 hours
Turbocharger rotor clearances	Check	3000 hr		Radial and axial clearance
Air filter element	Replace	4000 hr	24 mo	Renew every 2 years or 4,000 hrs (up to 5 cleanings allowed)
Intake/exhaust valve clearance	Adjust			First service — First at break-in; then when necessary
V-belt	Replace		12 mo	1 Year / 2 Year

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

Type	Item	Value	Unit	Condition
Clearance	Camshaft axial end play	0.20~0.90	mm
Clearance	Crankshaft end play (standard / limit)	0.190~0.322 / 0.452	mm
Clearance	Cylinder head lower face warpage (standard / limit)	0.05 or less / 0.2	mm
Clearance	Cylinder liner inner diameter (standard / limit)	φ127.990~φ128.010 / φ128.16	mm
Clearance	Main bearing oil gap (standard / limit)	0.066~0.132 / 0.166	mm
Clearance	Piston ring gap 2nd ring (standard / limit)	0.40~0.60 / 1.5	mm
Clearance	Piston ring gap oil ring (standard / limit)	0.40~0.70 / 1.5	mm
Clearance	Piston ring gap top ring (standard / limit)	0.35~0.55 / 1.5	mm
Clearance	Piston to cylinder liner clearance	0.233~0.271	mm
Clearance	Rocker arm bearing clearance (standard / limit)	0.015~0.068 / 0.25	mm
Clearance	Tappet clearance (standard / limit)	0.035~0.077 / 0.25	mm
Clearance	Turbocharger axial clearance	0.2	mm	wear limit 0.20 mm
Clearance	Turbocharger radial clearance	0.65	mm	limit of wear 0.57 mm
Gap	Magnetic speed sensor to ring gear air gap	not smaller than 0.020 in (0.45 mm)	mm	engine stopped
Gap	Tacho sensor gap	about 1.0	mm	tolerance limit 27° (gap ± 0.1 mm)
Injection timing	Fuel injection timing (B.T.D.C static)	12	degrees	static BTDC
Injection timing	Fuel injection timing (B.T.D.C static)	14	degrees	static BTDC
Injection timing	Fuel injection timing (B.T.D.C static)	16	degrees	static BTDC
Injection timing	Injection timing	18° ± 1°	degrees BTDC
Injection timing	Injection timing	19° ± 1°	degrees BTDC
Injection timing	Injection timing	21° ± 1°	degrees BTDC
Injection timing	Injection timing	23° ± 1°	degrees BTDC
Pressure	Bypass for entire oil filter valve opening pressure	4.5 ± 0.2	kg/cm2
Pressure	Bypass for filter element valve opening pressure	2.1 ± 0.3	kg/cm2
Pressure	Compression pressure	28	kg/cm2	at 200 rpm, water temperature 20°C
Pressure	Compression pressure limit	24	kg/cm2
Pressure	Cylinder compression pressure limit	24 or less	kg/cm2
Pressure	Cylinder compression pressure standard	25 ~ 28	kg/cm2	water temperature 20°C, 200 rpm
Pressure	Cylinder compression pressure tolerance limit	24	kg/cm2
Pressure	Fuel injection pressure	1st: 160, 2nd: 220	kg/cm2
Pressure	Fuel injection pressure	220	kg/cm2
Pressure	Fuel injection pressure	285	kg/cm2
Pressure	Fuel injection pressure (new nozzle holder)	300 + 8	kg/cm2
Pressure	Fuel injection pressure (used nozzle holder)	285 + 8	kg/cm2
Pressure	Injection nozzle opening pressure	28	MPa
Pressure	Lubricating oil pressure	Min. 100	kPa	idle speed
Pressure	Lubricating oil pressure	Min. 250	kPa	governed speed
Pressure	Oil pressure at idling	0.9~3.0	bar
Pressure	Oil pressure at rated speed / full load	3.0~6.5	bar
Pressure	Overflow valve operating pressure of injection pump	1.3~1.8	bar
Pressure	Pressure cap	Max. 49	kPa
Pressure	Relief valve opening pressure	8.5~10	kg/cm2
Resistance	Cold resistance of thermistor sensors	100 to 250	Ohms per sensor	cold
Resistance	Exciter armature resistance at 20°C	0.037	Ohms
Resistance	Rotor resistance at 20°C	0.343	Ohms
Resistance	Stator L/N resistance at 20°C	0.0085	Ohms
Speed	Engine speed	1500	rpm
Speed	Engine speed	1800	rpm
Speed	Speed control unit governor speed range	1K~7.5K	Hz	continuous
Temperature	Coolant temperature during operation	80~95	°C
Temperature	Oil temperature	less than 110	°C
Temperature	Thermostat full open temp	85	°C
Temperature	Thermostat open wide at	85	°C
Temperature	Thermostat opening temp	71	°C
Temperature	Thermostat opens at	71	°C
Temperature	Water temperature before start of full load	40	°C
Temperature	Water temperature max for standby and prime	103	°C
Torque	Alternator bracket (M14)	12	kg.m
Torque	Bearing cap side bolt (M12 x 1.5)	8	kg.m
Torque	Cam shaft timer (M10)	9	kg.m

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	Soft water + antifreeze 40% + rust preventive additive (DCA4) 3~5%			20.0 liter	Engine only: P158LE 20 L, P180LE 21 L, P222LE 23 L. Antifreeze % by ambient: over -10°C 15%, -10°C 20%, -15°C 27%, -20°C 33%, -25°C 40%, -30°C 44%, -40°C 50%
Coolant	40~50% antifreeze mixture		above -40°C		Antifreeze concentration table by ambient temperature (above -10°C = 15%; -40°C = 50%); add 3~5% additives (DCA4)
Engine oil	SAE 15W40	API CD or CE (initial factory fill high quality break-in oil for API Service CH-4)		21.0 liter	Oil pan capacity P158LE/PU158TI 21 L; P180LE/PU180TI 35 L; P222LE/PU222TI 40 L (max/min 21/17, 35/28, 40/33)
Engine oil	SAE 15W40 or 10W40	API Service CH-4			P126TI; initial factory filling is high quality break-in oil
Fuel	ASTM No.1-D / No.2-D / DIN 51601	Cetane number min 45; sulfur max 0.5 wt%			Cloud point should be 12°C (10°F) below the lowest expected fuel temperature; water & sediment max 0.05%
Fuel	Diesel fuel oil	Low Sulfur Diesel; sulfur content max. 0.05 wt% (halve oil change interval if > 0.02 wt%)			Doosan recommends installation of a fuel water separator

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Adjusting injection timing adjustment

Loosen fixing bolts (M8) of injection pump driving gear.
Turn crank pulley clockwise until V-groove of flywheel housing sight hole aligns with injection timing degree.
Turn flange until injection pump pointer mark matches mark (FB) on drive gear flange.
Tighten bolt M8 to specified torque being careful not to move drive gear.
Recheck the injection timing start point of fuel delivery.

Adjusting valve clearance (DP158/DP180/DP222) adjustment

⚠ Only adjust the valve clearance when the engine is cold.

Tools: Feeler gauge, Ring spanner

Rotate crankshaft so #1 cylinder is at compression TDC.
Loosen lock nut of #1 cylinder rocker arm.
Push feeler gauge between rocker arm and valve stem.
Adjust clearance screw and tighten lock nut.
Rotate crankshaft; when a cylinder reaches compression TDC adjust its valve clearance.
When a cylinder is at valve overlap, adjust the cylinder at compression TDC.

Checking and adjusting injection timing adjustment

Remove plug screw in case cover on injection pump drive gear.
Turn crank pulley so mark on injection pump pointer coincides with matching mark (FB) on drive gear flange.
Check V-type edge of flywheel housing sight hole coincides with injection timing degree on flywheel.
To adjust, loosen fixing bolts (M8) of injection pump driving gear.
Turn crank pulley clockwise until V-groove of sight hole aligns with injection timing degree.
Coincide mark on injection pump pointer with FB mark by turning flange in oblong holes.
Tighten bolt (M8) to 2.2 kg.m and recheck fuel delivery start point.

Valve clearance adjust procedure adjustment

Tools: Feeler gauge (60.99901-0027), Spanner, Screwdriver

Turn crankshaft to bring #1 cylinder piston to compression top dead center.
Loosen lock nuts of rocker arm adjusting screws.
Push feeler gauge of specified value between rocker arm and valve stem.
Adjust clearance with adjusting screw and tighten with lock nut.

Cylinder compression pressure check diagnostic

Tools: Compression pressure gauge, Gauge adapter

Warm up the engine then stop it and remove nozzle assemblies.
Install special tool (gauge adapter) in nozzle holder hole.
Connect the compression pressure gauge to the adapter.
Cut off fuel circulation, rotate the starter, measure each cylinder pressure.

Installation of injector installation

⚠ Injection lines are designed for high operating pressures and should be handled with particular care.

⚠ Do not bend pipes to permanent deformation.

Clean seat in cylinder head.
Insert nozzle holder with new seal ring.
Tighten union nut with 120 N.m.
Install injection lines free of constraint.
Install leak fuel lines and screw delivery pipe at nozzle holder and injection pump.

Air removal of fuel system maintenance

Loosen the air removing screws of the cartridge filter.
Operate the manual pump of the fuel supply pump until bubbles disappear.
Suction chamber is continuously bled via relief valve during operation.

Bleeding the fuel system maintenance

⚠ Fuel is highly inflammable; no naked flames or sparks.

Loosen the air bleeding plug on the fuel filter.
Operate the priming pump by hand to bleed air.
Operate the priming pump until air is discharged completely.
Close the plug screws of the filter and the pump.

Charging the coolant maintenance

⚠ Do not mix antifreezes from different manufacturers.

⚠ Discard exchanged coolant according to regulations.

Ensure that the engine is cool.
Open the radiator cap.
Pour the coolant in slowly.
Be sure that the air is gone from the cooling system.
Check the coolant level when warmed up and replenish if necessary.

Cleaning filter elements (air cleaner) maintenance

⚠ Never use steam sprayers, petrol, alkalis or hot liquids to clean the filter elements.

Tools: Air gun, Goggles

Clean by compressed air using an air gun with a 90° bent nozzle extension.
Blow out element from inside at maximum 500 kPa (5 bar) until no more dust comes out.
Or wash: preclean with compressed air, soak in lukewarm solvent 10 minutes, agitate 5 minutes.
Rinse thoroughly in clean water, shake out and dry at room temperature.
Check cartridge for damage before reinstalling.

Cleaning the air filter element maintenance

⚠ Always wear protective goggles.

⚠ Never use steam spray, gasoline, alkali or hot cleansing solution.

Tools: Air gun, Protective goggles

By compressed air: use air gun at 90° from inside, blow from inside out.
Do not exceed 5 bars.
By washing: preclean with compressed air, soak in warm solvent 10 minutes, agitate 5 minutes.
Rinse with clean water, dry at room temperature fully before reassembling.

Coolant draining maintenance

⚠ When removing the pressure filler cap while hot, cover with a rag and turn slowly.

⚠ Never open the radiator cap while the engine is overheated.

Remove the pressure cap.
Open the drain valve located at the bottom of the radiator to drain coolant.
Loosen the coolant drain plug of the cylinder block.
Drain cooling water in the oil cooler.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
190 - 208	3	winding 6	12 wires (T1 to T12)	Factory connection 12 wires - 50 Hz - LSA 46.2/47.2
190 - 208	3	winding 8	12 wires (T1 to T12)	Factory connection 12 wires - 60 Hz
190 - 240	3	winding 6	12 wires (T1 to T12)	Factory connection 12 wires - 60 Hz
220	3	winding 7	12 wires (T1 to T12)	Factory connection 12 wires - 50 Hz
220 - 240	1 (L2/L3 single phase)	winding 6	12 wires	Voltage LM = 1/2 voltage LL
220 - 240	1 (L2/L3 single phase)	winding 7	12 wires	Voltage LM = 1/2 voltage LL - 50 Hz 240 - 254
380 - 415	3	winding 6	12 wires (T1 to T12)	Factory connection 12 wires - 50 Hz
380 - 415	3	winding 6S	6 wires	Factory connection 6 wires - 50 Hz (not possible with R250 on LSA 47.2)
380 - 416	3	winding 8	12 wires (T1 to T12)	Factory connection 12 wires - 60 Hz
380 - 480	3	winding 6	12 wires (T1 to T12)	Factory connection 12 wires - 60 Hz
380 - 480	3	winding 6S	6 wires	Factory connection 6 wires - 60 Hz
440	3	winding 7	12 wires (T1 to T12)	Factory connection 12 wires - 50 Hz
500	3	winding 9	12 wires (T1 to T12)	50 Hz - winding 9: R 450 voltage detection + transformer
600	3	winding 9	12 wires (T1 to T12)	60 Hz - winding 9: R 450 voltage detection + transformer
600	3	winding 9S	6 wires	60 Hz - winding 9: R 450 voltage detection + transformer

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Aftermarket parts that fit this engine

65.05904A0092 FridayParts $52.66 65.01201-0312C FridayParts $125.99 65.11501-7006 FridayParts $735.50 420108-00111 KuduParts $44.00 FridayParts $46.45 385-450DW FridayParts $46.45 300743-00068 FridayParts $149.99 65.96801-0013 FridayParts $26.25 65.96801-0103 FridayParts $26.25 FP-XP-0015196

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Common questions

What is the oil capacity of the Doosan P158LE?

The Doosan P158LE engine has an oil capacity of 21.0 liters.

What is the displacement of the Doosan P158LE?

The Doosan P158LE has a displacement of 14.618 liters with 8 cylinders.

Which generators use the Doosan P158LE engine?

The Doosan P158LE powers 1 generator set(s), including Doosan P158LE.

How often should you change the oil in the Doosan P158LE?

The Doosan P158LE oil change interval is every 200 hours.