MTU 12V 4000 G23 Engine
The MTU 12V 4000 G23 is a 4.77 L 16-cylinder tci engine rated at 1500 rpm, producing up to 1575 kW. It powers generator sets from Kohler, MTU and Talles, including the 1500REOZDD, 12 V 4000 G23, 12V4000 DS1750 and DP 1670 D5S FW. It holds 60 L (15.9 gal) of oil and 160 L (42.3 gal) of coolant.
Also known as: MTU 12V 4000 G23
Part of the MTU 12V4000 engine family — 62 variants share parts & fitment.
Service parts for the 12V 4000 G23
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Fuel system
1 requiredP550849Fuel filterfind
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
Engine specifications
| Oil capacity | 60.0 L |
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| Coolant capacity | 160.0 L |
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| Displacement | 4.77 L |
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| Cylinders | 16 |
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| Aspiration | TCI |
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| Rated speed | 1500 rpm |
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| Gross power | 1575 kW |
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Common problems
15- LO P-Fuel (Common Rail pressure < reference value; DBR fuel limitation, start of injection readjusted towards late; suction restrictor of HP fuel block jamming or HP fuel control block wiring faulty. 083
Fix: Contact Service. - HI P-Fuel (Common Rail pressure > reference value; DBR fuel limitation, start of injection readjusted towards late; suction restrictor of HP fuel block jamming or HP fuel control block wiring faulty. 082
Fix: Contact Service. - HI P-Diff. Lube Oil 025
- Wiring TO 3 SD alarm configuration; short circuit or wire break on transistor output 3 (TO 3) 373 AL
- Wiring TO 2 SD alarm configuration; short circuit or wire break on recirculation transistor output 2 (TO 2). 372 AL
Fix: 1. Check turbocharger valve/cabling, repair as necessary. 2. Replace ECU. - Wiring TO 1 SD alarm configuration; short circuit or wire break on turbocharger transistor output 1 (TO 1). 371 AL
Fix: 1. Check turbocharger valve/cabling, repair as necessary. 2. Replace ECU. - Violation of second limit for external temperature channel 2 point, which is read via CAN bus 072
- Violation of second limit for external temperature channel 1 point, which is read via CAN bus 070
- Violation of second limit for external pressure channel 2 point, which is read via CAN bus 076
- Violation of second limit for external pressure channel 1 point, which is read via CAN bus 074
- Violation of first limit for external temperature channel 2 | (Depending on the corresponding measuring point, which is read via CAN bus) 071
- Violation of first limit for external temperature channel 1 point, which is read via CAN bus 069
- Violation of first limit for external pressure channel 2 point, which is read via CAN bus 075
- Violation of first limit for external pressure channel 1 point, which is read via CAN bus 073
- Stop Power Stage SD alarm configuration; internal electronic fault (electronics possibly faulty: start ITS). If the ITS diagnosis result is “electronics OK 363 AL
Fix: 1. Check cabling. 2. Attempt to restart engine.
Compiled from service & troubleshooting documentation across every generator set that uses the MTU 12V 4000 G23.
Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Fuel filter | double walled fuel injection pipes with leakage monitoring, Racor 75/1000FHX model duplex pre-filter | | 33763 | | Amazon $30.19 eBay $29.99 PartsGeek $29.97 |
| Oil filter | lube oil filters multi stage | | — | | |
| Belt | resilient coupling between engine and generator, air filter mountings and flexible engine-filter connections | | — | | |
| Oil | lube oil heat exchanger, lube oil filters multi stage, lube oil centrifuge | | — | | |
| Spark plug | individual cylinder heads with exhaust valve rotators “Rotocap” | | — | | |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Service specifications
31| Type | Item | Value | Unit | Condition |
|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. | |
| Temperature | Jacket water heater adjustable thermostat | 32 to 55 | °C | |
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 |
|---|
| 380/400/415 | | | | Standard scope voltage, 50 Hz (S1600/S2000/S4000) |
| 380/440/480 | | | | Standard scope voltage, 60 Hz (S1600/S2000/S4000) |
| 400/230 | | | | Standard scope voltage, 1600 series, 50 Hz |
| 440/480 | | | | Alternator voltages, 60 Hz |
| 480/277 | | | | Standard scope voltage, 1600 series, 60 Hz |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Parts cataloged across the MTU 12V4000 family
4| Part # | Description | Category |
|---|
| WM00076 | Air filter element | air_filter |
| WM00086 | Easy-change fuel filter | fuel_filter |
| WM00067 | Oil filter element | oil_filter |
| 3082751 | Reman engine | other_service |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Aftermarket parts that fit this engine
2Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Filters for this engine
- Fuel filter: Donaldson P550849 Wix 33763
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Also used in
2- Hitachi EH3000 — Haul Truck
- Hitachi EH3500 — Haul Truck
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
Common questions
What is the oil capacity of the MTU 12V 4000 G23?
The MTU 12V 4000 G23 engine has an oil capacity of 60.0 liters.
What is the displacement of the MTU 12V 4000 G23?
The MTU 12V 4000 G23 has a displacement of 4.77 liters with 16 cylinders.
Which generators use the MTU 12V 4000 G23 engine?
The MTU 12V 4000 G23 powers 7 generator set(s), including Kohler 1500REOZDD, MTU 12 V 4000 G23, MTU 12V4000 DS1750, MTU DP 1670 D5S FW, MTU DS 1880 D5S FW.
What fuel filter does the MTU 12V 4000 G23 use?
The MTU 12V 4000 G23 uses fuel filter part numbers Donaldson P550849, Wix 33763.
What is a common problem with the MTU 12V 4000 G23 engine?
A commonly reported issue on generators using the MTU 12V 4000 G23 is: LO P-Fuel (Common Rail pressure < reference value; DBR fuel limitation, start of injection readjusted towards late; suction restrictor of HP fuel block jamming or HP fuel control block wiring faulty.. Fix: Contact Service..