There is no universal MTU 4000 overhaul interval, and any site that publishes one for the series is publishing a marketing number. What exists is a maintenance schedule in the engine's own documentation, expressed in hours and conditions, and then a set of real-world modifiers that move the actual date: the load factor the engine has been running at, the quality and interval discipline of the oil and fuel, the operating environment, and what the oil analysis and physical measurements show.
That is why two 4000-series engines with the same hour count can be in completely different condition. For a buyer, the useful question is not "when is my overhaul due" but "which positions am I likely to need, and which of them have lead times long enough to plan around now". This guide covers the factors and the planning side.
What to settle before the overhaul date is fixed
- Oil analysis trend over the last several samples — the single most useful predictor available
- Load factor and duty history: continuous rated load versus intermittency and standby running
- Fuel and lubricant quality, filtration intervals, and whether they have been kept to schedule
- Operating environment: marine salt and humidity, dust, temperature, and idling time
- Measured condition data the workshop has already taken: compression, blow-by, clearances
- Which positions are long-lead (high-value assemblies) versus short-lead (seals, filters, fasteners)
The planning mistake that costs the most is not ordering the wrong part — it is leaving the long-lead positions until the engine is open. Start the availability check on high-value assemblies first, then build the consumable list around whatever the workshop finds.
Parts We Supply for This Series
The groups below are generated from catalog records listed under this engine series (176 part numbers). Open any number for fitment, weight, HS code, and interchange details, or browse the full MTU 4000 Series Parts Catalog.
Gaskets and seals (46)
| 0000160119 | Sealing Ring |
| 0219976547 | Crankshaft Front Seal Ring |
| 0219976647 | Crankshaft Rear Seal Ring |
| 0299976748 | O-Ring |
| 23524783 | Seal |
| 23540304/A1 | Gasket Kit |
| 5240111380 | Gasket |
| 5240111480 | Gasket |
| 5241420057 | Sealing Ring |
| 5241420780 | Gasket |
| 5241870380 | Gasket |
| 5241880180 | Gasket |
Engine components (33)
| 0000530926 | Valve Keeper Wedge |
| 0001424957 | Exhaust Manifold Ring |
| 0001800015 | Pressure Reducing Valve Assembly |
| 000908030002 | Thread Plug |
| 0049976736 | Drain Valve |
| 0090374419 | Keystone Compression Ring |
| 5260160153 | Sleeve |
| 5260200305 | Housing and Rotating Assembly |
| 5272010153 | Spacer Sleeve |
| 8691840027 | Complete Rotor |
| X00044065 | Rubber Sleeve |
| X00E50200176 | Connection Interface |
Pistons and liners (17)
| 0090375019 | Taper Face Compression Ring |
| 0120373618 | Oil Control Ring |
| 5110850960 | Piston Ring |
| 5240114210 | Cylinder Liner Size 0 |
| 5240382550 | Conrod Bushing Size 0 |
| 5240384110 | Conrod Bearing Upper Half |
| 5240384210 | Conrod Bearing Size 0-1 |
| EX00008371 | Piston |
| EX00035690 | Piston |
| EX59403700072 | Piston |
| EX59403800070/42 | Conrod |
| X00008369 | Piston |
Drive components (14)
| 000125013012 | Washer |
| 000912010014 | Hex Socket Head Bolt |
| 11506101 | Nut |
| 5110251976 | Washer |
| 5240380471 | Conrod Bolt |
| 5240550550 | Bushing |
| 5249900605 | Hex Cap Bolt |
| 5249900705 | Hex Flange Bolt |
| 5272010505 | Water Pump Shaft |
| 700223010000 | Banjo Bolt A12 |
| X00007116 | V-Band Clamp |
| X51299100019 | V-Ribbed Belt |
Sensors and electrical (14)
| 0005357333 | Speed Sensor |
| 0005357633 | Speed Sensor |
| 0005357833 | Speed Sensor |
| 0005358133 | Speed Sensor |
| 0035352231 | Pressure Sensor |
| 5205304069 | Speed Transmitter |
| X00040012 | Speed Sensor |
| X00E50201372 | Temperature Sensor |
| X00E50207213 | Pressure Sensor |
| X52420300037 | Thermal Actuator |
| X59620600007 | Thermal Actuator |
| X00E50207196 | Pressure Sensor |
Bearings (12)
| 5240332608 | Thrust Bearing, Size 0-1, UP/RIL |
| 5240332630 | Crankshaft Bearing Aux PTO End |
| 5240332730 | Crankshaft Bearing Driving End |
| 5240333407 | Thrust Bearing, Size 0-1, LO/SPT |
| 5240336602 | Crankshaft Bearing Lower Half |
| 5240336702 | Crankshaft Bearing Size 0-1 |
| 5240510110 | Camshaft Bearing, Standard |
| X00016024 | Crankshaft Bearing Size 0-0 |
| X00016599 | Bearing Bushing |
| X52403100003 | Crankshaft Bearing Size 0-1 |
| X59610100061 | Bearing Body |
| X59610100101 | Thrust Bearing |
Filters (11)
| 23540455 | Centrifugal Oil Filter Assembly |
| X57508300091 | Spin-On Fuel Filter |
| XP00A36400005 | Filter Element |
| XP52618300032 | Oil Filter Element |
| XP52712100002 | Filter Element |
| XP52712100003 | Filter Element |
| XP52712100005 | Filter Element |
| XP52712100006 | Filter Element |
| XP52718300060 | Paper Insert |
| XP59408300054 | Filter Cartridge |
| XP59501800123 | Filter Element |
Valve train (10)
| 5240530120 | Outer Valve Spring |
| 5240530122 | Inner Valve Spring |
| 5240530805 | Exhaust Valve |
| 5240530830 | Valve Guide |
| 5240530905 | Exhaust Valve |
| 5240531101 | Inlet Valve |
| X52404100226 | Inlet Valve |
| X52404200010 | Valve Guide |
| X52405400013 | Pushrod |
| X52499100259 | Adjusting Screw |
Fuel system (8)
| 5240160153 | Injector Sleeve |
| EX52407500064 | Injector |
| X52408300025 | Fuel Hand Pump |
| X52808100004 | Fuel Delivery Pump |
| X54707700072 | Relief Valve for 4-Cylinder HP Pump |
| X59407700023 | HP Fuel Line |
| 5240780824 | Fuel Rail Rear Connector |
| X52808100014 | Fuel Delivery Pump |
Cooling system (4)
| 5240980281 | Hose |
| X00041552 | Cooler Plate |
| XP59420700027 | Impeller |
| X54920200040/87 | High-Temperature Water Pump |
Turbocharging (2)
| 5110804420 | Turbine Wheel |
| X00038531 | Turbocharger Oil Supply Hose |
Starting and charging (2)
| X52421300004 | Alternator |
| X59417200010 | Electric Starter |
Air and intake (2)
| X59499100014 | Hose for Air Compressor |
| X59499100015 | Hose for Air Compressor |
Repair kits (1)
| XP52718300065 | Circlip Kit |
Related Resources
- MTU 4000 Overhaul Parts Guide
- Building a 2000 Series Overhaul Parts List
- MTU 4000 Overhaul RFQ Worksheet
- MTU 4000 Series Parts (by engine model)
- Catalog PDF downloads — this series' part-number index as a printable PDF
- Reading a parts diagram — from position number to part number
- Authorised dealer or independent supplier?
- All parts guides
FAQ
What is the overhaul interval for an MTU 4000 engine?
There is no single figure for the series, and we will not publish one. The schedule is defined in the documentation for your specific engine, expressed against operating conditions, and then modified by how the engine has actually been run. Oil analysis and measured condition are what settle the timing in practice.
Can you send me a complete overhaul kit list for my engine?
We can quote a list you provide, and we can build a reference worksheet that itemizes the groups an overhaul usually touches — but we will not send an unqualified "complete kit", because what your engine needs depends on its serial range, hours, and measured condition.
Which positions should I check availability on first?
High-value assemblies: turbochargers, injectors, pumps, and heads. These carry the longest lead times and the most variant sensitivity. Filters, gaskets, seals, and fasteners follow once the scope is confirmed.
Does a marine propulsion engine overhaul differently from a genset unit?
Yes. Duty cycle, load factor, and environment differ enough that the same hour count produces different wear patterns. Tell us the application with the inquiry, because some positions differ between propulsion, generator, and auxiliary configurations even within one variant.
Send your engine details: Model, serial number, and the positions you need — we verify fitment and supersessions, then quote with availability per line.