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Mitsubishi PS6 Engine Engine

Name: Mitsubishi PS6 Engine
Brand: Mitsubishi

The Mitsubishi PS6 is a 24.5 L 6-cylinder turbocharged - with aftercooler engine. It powers generator sets from Mitsubishi, including the S6R S6R2.

Also known as: Mitsubishi PS6

Part of the Mitsubishi PS6 engine family — 2 variants share parts & fitment.

24.5 L

Displacement

Cylinders

Engine specifications

Displacement	24.5 L
Cylinders	6
Aspiration	turbocharged - with aftercooler

Generator sets powered by this engine

Mitsubishi S6R S6R2

Common problems

White or blue exhaust smoke
Cause: Too much oil in engine. Oil viscosity too low. Engine overcooled.
Fix: Maintain correct oil level. Change oil. Use radiator cover or consult your Mitsubishi dealer.
Water pump defective
Fix: Consult your Mitsubishi dealer.
Valve stem seals worn
Fix: Consult your Mitsubishi dealer.
V-belts too loose
Fix: Readjust.
Thermostat defective
Fix: Consult your Mitsubishi dealer.
Starter will not crank engine or cranks slowly, resulting in a failure to start
Cause: Battery-starter circuit open or shorted. Starter or starter relay defective. Battery discharged.
Fix: Replace battery-starter circuit switch. Replace starter or starter relay. Repair or recharge battery.
Starter will crank engine, but engine will not start
Cause: Air inlet & exhaust systems Air cleaner clogged. Bad quality fuel. Waiter and sediment. Fuel filter clogged. Fuel pipe restricted or leaky. Fuel feed pump defective. Fuel injection pump defective. Muffler or exhaust pipe restricted. Compression pressure low. Cylinders, pistons and piston rings worn. Valve springs broken. Valve seats and nozzle packing seal defective.
Fix: Prime fuel system. Clean air inlet & exhaust systems. Change bad quality fuel. Drain waiter and sediment. Change fuel filter. Repair or replace fuel pipe. Consult your Mitsubishi dealer for fuel feed pump and fuel injection pump defects. Run air compressor to increase air pressure if using air motor type. Clean or change starter valve if stuck.
Smoke
Cause: Valve clearance incorrect
Fix: Readjust.
Relief valve defective
Fix: Consult your Mitsubishi dealer.
Radiator and/or heat exchanger dirty
Fix: Clean or consult your Mitsubishi dealer.
Oil viscosity too low
Fix: Change oil.
Oil pump defective
Fix: Consult your Mitsubishi dealer.
Oil pressure sensor circuit defective
Fix: Consult your Mitsubishi dealer.
Oil filter clogged
Fix: Change.
Not enough oil in engine
Fix: Refill up to specified level.

Compiled from service & troubleshooting documentation across every generator set that uses the Mitsubishi PS6.

Maintenance schedule

Item	Capacity	Part #	Interval
Air filter		—		find
Fuel filter		—	430 hr	find
Oil filter		—	50 hr	find
Belt		—	590 hr	find
Coolant filter		—		find
Hydraulic filter		—		find
Oil	82.0 liters [22 U.S. gallons]	—	50 hr

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

Parts cataloged across the Mitsubishi PS6 family

Part #	Description	Category
8-16	Cleaning, inspecting, and replacing the air cleaner element	changing_air_cleaner_element
8-17	Cleaning, inspecting, and replacing the air cleaner element	changing_air_cleaner_element
8-10	Changing the coolant	changing_coolant
8-14	Cleaning, inspecting and replacing pre-cleaner	cleaning_pre_cleaner
8-18	Coolant drain cock - water pump	coolant_filter
36291-00098	Oil sample bottle set	oil_filter
36291-19100	Engine oil sampling pump	oil_filter
30 40 50 60	LLC concentration, %	other_service
32522-04111	Thermo label for temperature management (75 to 95°C)	other_service
32522-04211	Thermo label for temperature management (100 to 120°C)	other_service
32522-04311	Thermo label for temperature management (50 to 70°C)	other_service
45483-51300	Warning label	other_service
45493-50700	Do not open inspection cover.	other_service
45493-51100	Warning label	other_service
45493-51200	INSPECTION COVER WITHIN 10 MINUTES AFTER ENGINE STOP.	other_service
45493-51400	Rotating parts can cause severe personal injury.	other_service
45493-51500	BE CAREFUL OF ROTATING FAN.	other_service
99410-12100	Mitsubishi S6R- S6R2 diesel engine	other_service
Below1.22	Discharged	other_service
32522-04100	Thermo Label 75°C to 95°C (167°F to 203°F)	thermostat
35559.04200	Thermo Label	thermostat

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

What is the displacement of the Mitsubishi PS6?

The Mitsubishi PS6 has a displacement of 24.5 liters with 6 cylinders.

Which generators use the Mitsubishi PS6 engine?

The Mitsubishi PS6 powers 1 generator set(s), including Mitsubishi S6R S6R2.

How often should you change the oil in the Mitsubishi PS6?

The Mitsubishi PS6 oil change interval is every 50 hours.

What is a common problem with the Mitsubishi PS6 engine?

A commonly reported issue on generators using the Mitsubishi PS6 is: White or blue exhaust smoke. Cause: Too much oil in engine. Oil viscosity too low. Engine overcooled.. Fix: Maintain correct oil level. Change oil. Use radiator cover or consult your Mitsubishi dealer..