"> MAN Energy Solutions 5G70ME-C9.6
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MAN Energy Solutions

5G70ME-C9.6

The MAN 5G70ME-C9.6 is a low‑speed, five‑cylinder two‑stroke marine diesel engine delivering up to 34 350 kW at 91 rpm, notable for its hydraulic camshaft system and advanced electronic control that lower specific fuel consumption and meet IMO Tier III NOx limits.

MAN Energy Solutions 5G70ME-C9.6
34350.0 kW
Power

Engine Specifications

5
Cylinders
700 mm
Bore
3256 mm
Stroke
34,350 kW
MCR Power
91.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: MAN Energy Solutions ME/ME-C · Tier: Tier III · Fuel: HFO, VLSFO, MDO

Inspector Detail

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Designation decoded

5 = number of cylinders, G = Green Ultra Long Stroke, 70 = 700 mm bore, ME-C = MAN Electronically controlled Mark C, 9.6 = Mark 9.6 control generation.

Background

The G70ME-C with a 700mm bore and 3256mm stroke (S/B=4.65) is a high-power platform. 5 cylinders at 700mm is rather unusual — typical for specific applications with moderate power at maximum efficiency. Large containerships and VLCCs normally use 6-8 cylinders at this bore size.

Calculated metrics

Stroke To Bore Ratio
4.65

Inspector checklist

Fuel System
  • Fuel pumps: plunger, nozzles, spray pattern for the 700mm combustion chamber
  • Pre-heating: 12-15 cSt
  • Cat fines: <15 ppm, greater damage potential at 700mm bore
  • VLSFO
Running Gear and Tribology
  • 700mm liners: large diameter, wear, BN, honing pattern
  • Piston rings: note thermal distortion at 700mm
  • Crosshead: S/B=4.65, 3256mm stroke, extreme side forces, LI reading critical
  • Stuffing box: long stroke means increased drainage monitoring
ME Control
  • HPS 300 bar: high flow rates
  • FIVA Mark 9.6
  • CCU
Turbocharger
  • Larger unit for 700mm
  • Cleaning, bearing clearance
  • Scavenge air pressure

Logbook reference values

Parameter Expected Deviation means
Exhaust gas temperature 320-420°C >25°C spread
Scavenge air pressure 2.5-3.8 bar TC fouling
Cylinder oil consumption 0.7-1.2 g/kWh BN
Pmax Per test bed +/-5 bar Timing/compression
OMD <2.5% LEL Stuffing box

Common Failure Modes

Cat fine damage
Symptoms: Liner wear, piston ring
Causes: Separator, VLSFO
Preventive: <15 ppm.
Crosshead bearing damage
Symptoms: Knocking, LI, temperature
Causes: S/B=4.65, 3256mm stroke, Oil
Preventive: LI every 8000 op. hours.
Cold corrosion
Symptoms: Wear
Causes: BN, Part load
Preventive: Adjust BN.

Expert tips

  • 💡 5 cylinders on a G70 is a special configuration — pay particular attention to torsional vibration analysis and barred speed range.
  • 💡 S/B=4.65 with 3256mm stroke: crosshead inspection is the single most important measure.
  • 💡 At 700mm bore with only 5 cylinders: relatively low total output — check whether the engine is operated within its efficient load range.

Related components

Turbocharger Scavenge air cooler Separators Alpha Lubricator HPS Torsional damper

Classification & regulatory

IMO Tier II. ECA: VLSFO/scrubber.

Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.

Other Cylinder Configurations 50

5G40ME-C9.6
5 cyl · 8,550 kW
5G45ME-C9.6
5 cyl · 11,250 kW
5G50ME-C9.6
5 cyl · 15,500 kW
5G60ME-C9.6
5 cyl · 24,500 kW
5G65ME-C9.6
5 cyl · 29,350 kW
5G80ME-C9.6
5 cyl · 44,500 kW
5G90ME-C9.6
5 cyl · 56,000 kW
5G95ME-C9.6
5 cyl · 63,500 kW
5S40ME-C9.6
5 cyl · 7,850 kW
5S46ME-C9.6
5 cyl · 15,500 kW
5S50ME-C9.6
5 cyl · 18,650 kW
5S60ME-C9.6
5 cyl · 28,250 kW
5S65ME-C9.6
5 cyl · 35,000 kW
5S70ME-C9.6
5 cyl · 40,400 kW
5S80ME-C9.6
5 cyl · 51,000 kW
5S90ME-C9.6
5 cyl · 64,350 kW
5S95ME-C9.6
5 cyl · 71,000 kW
6G40ME-C9.6
6 cyl · 10,260 kW
6G45ME-C9.6
6 cyl · 13,500 kW
6G50ME-C9.6
6 cyl · 18,600 kW
6G60ME-C9.6
6 cyl · 29,400 kW
6G65ME-C9.6
6 cyl · 35,220 kW
6G70ME-C9.5
6 cyl · 20,520 kW
6G70ME-C9.6
6 cyl · 41,220 kW
6G80ME-C9.6
6 cyl · 53,400 kW
6G90ME-C9.6
6 cyl · 67,200 kW
6G95ME-C9.6
6 cyl · 76,200 kW
6S40ME-C9.6
6 cyl · 9,420 kW
6S46ME-C9.6
6 cyl · 18,600 kW
6S50ME-C8.5
6 cyl · 10,680 kW
6S50ME-C9.6
6 cyl · 22,380 kW
6S60ME-C9.6
6 cyl · 33,900 kW
6S65ME-C9.6
6 cyl · 42,000 kW
6S70ME-C8.5
6 cyl · 18,660 kW
6S70ME-C9.6
6 cyl · 48,480 kW
6S80ME-C9.5
6 cyl · 24,000 kW
6S80ME-C9.6
6 cyl · 61,200 kW
6S90ME-C9.6
6 cyl · 77,220 kW
6S95ME-C9.6
6 cyl · 85,200 kW
7G40ME-C9.6
7 cyl · 11,970 kW
7G45ME-C9.6
7 cyl · 15,750 kW
7G50ME-C9.6
7 cyl · 21,700 kW
7G60ME-C9.6
7 cyl · 34,300 kW
7G65ME-C9.6
7 cyl · 41,090 kW
7G70ME-C9.6
7 cyl · 48,090 kW
7G80ME-C9.5
7 cyl · 34,930 kW
7G80ME-C9.6
7 cyl · 62,300 kW
7G90ME-C9.6
7 cyl · 78,400 kW
7G95ME-C9.5
7 cyl · 46,550 kW
7G95ME-C9.6
7 cyl · 88,900 kW

Components & Design

Alpha Lubricator Control MAN Energy Solutions
MAN Alpha Lubricator Mk III
Feed rate 0.6-1.2 g/kWh depending on fuel sulfur. Monitor via Alpha ACC (Adaptive Cylinder lubrication Control).
Lead time: 6 wk
25.0 kg
Crankcase Oil Mist Detector Schaller Automation
Schaller Visatron VN215+ OMD
SOLAS mandatory. Test weekly. Clean sensor optics every 4,000 hrs. Replace reference cell every 2 years.
Lead time: 2 wk
8.0 kg
Crosshead Bearing MAN Energy Solutions
MAN Crosshead Bearing (thin-shell, white metal)
Inspect at 16,000 hrs. Check bearing clearance. Monitor via bearing temperature and oil analysis.
Lead time: 12 wk
380.0 kg
Cylinder Liner MAN Energy Solutions
MAN ME-C Cylinder Liner (bore-cooled)
Wear monitoring via calibration. Max wear 0.8% of bore. Replace typically at 32,000-60,000 hrs.
Lead time: 16 wk
3500.0 kg
Engine Control Unit (ECU / ECS) MAN Energy Solutions
MAN ECS (Engine Control System)
Dual-redundant ECU. Software updates via MAN PrimeServ. Keep backup CCU on board.
Lead time: 8 wk
45.0 kg
Exhaust Valve (& Valve Seat) MAN Energy Solutions
MAN Exhaust Valve (Nimonic/Stellite)
Overhaul at 8,000-12,000 hrs. Stellite-faced seat. Grinding/lapping at overhaul. Check spindle guide clearance.
Lead time: 8 wk
320.0 kg
FIVA Valve (ME-type) MAN Energy Solutions
MAN FIVA Valve (ME-C)
FIVA = Fuel Injection Valve Actuator. Overhaul at 8,000 hrs. Critical for timing accuracy.
Lead time: 8 wk
35.0 kg
Fuel Booster Module (ME-type) MAN Energy Solutions
MAN Fuel Booster Module
Overhaul at 16,000 hrs. Pressure test fuel pipes. Check plunger wear with micrometer.
Lead time: 12 wk
450.0 kg
Fuel Valve (Injector) MAN Energy Solutions
MAN ME-C Fuel Valve Assembly
Overhaul every 4,000-8,000 hrs. Pressure test after overhaul. Nozzle replacement at 8,000 hrs.
Lead time: 4 wk
85.0 kg
Governor (Electronic/Woodward) Woodward
Woodward 723PLUS Digital Governor
Electronic governor integrated with ECS on ME engines. Firmware updates via Woodward service.
Lead time: 4 wk
15.0 kg
Hydraulic Cylinder Unit (HCU) MAN Energy Solutions
MAN HCU (ME-C type, per cylinder)
One HCU per cylinder. FIVA valve overhaul at 8,000 hrs. Booster overhaul at 16,000 hrs.
Lead time: 12 wk
1200.0 kg
Hydraulic Power Supply (HPS) MAN Energy Solutions
MAN HPS Unit (ME-C)
Servo oil SAE 30 / System oil. Filter change every 4000 hrs. Monitor servo oil pressure.
Lead time: 16 wk
2800.0 kg
Main Bearings MAN Energy Solutions
MAN Main Bearing Shells (white metal/tri-metal)
Inspect at 16,000 hrs. Jack up crankshaft for clearance measurement. Replace at signs of overlay fatigue.
Lead time: 8 wk
250.0 kg
PMI (Pressure Measurement Indicator) MAN Energy Solutions
MAN PMI Sensor System
Online cylinder pressure monitoring. Calibrate sensors annually. Essential for combustion optimization.
Lead time: 4 wk
5.0 kg
Piston Crown MAN Energy Solutions
MAN ME-C Piston Crown (bore-cooled Cr-Mo steel)
Inspect at 16,000 hrs. Pull piston at 16,000-24,000 hrs. Check cooling bores with borescope.
Lead time: 16 wk
1800.0 kg
Piston Ring Pack MAN Energy Solutions
MAN Piston Ring Set (CPR / AL rings)
CPR (Controlled Pressure Relief) top ring. Replace at 8,000-16,000 hrs depending on wear.
Lead time: 4 wk
60.0 kg
Scavenge Air Cooler MAN Energy Solutions
MAN Scavenge Air Cooler (plate-type)
Clean air side every 4,000-8,000 hrs (chemical/HP water). Monitor pressure drop and charge air temp.
Lead time: 16 wk
5500.0 kg
Turbocharger Unit (ABB/MHI/Napier) ABB Turbocharging
ABB A175-L Turbocharger
Overhaul at 12,000-16,000 hrs. Water washing every 24-100 hrs depending on load.
Lead time: 12 wk
4500.0 kg

Technical Data

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Manuals

  • operating
    MAN B&W ME/ME-C/ME-B Engine Operation (OM-ME-C)
    MAN Energy Solutions
  • maintenance
    MAN B&W ME/ME-C Maintenance Manual (MM-ME-C)
    MAN Energy Solutions
  • spare_parts
    MAN B&W ME/ME-C Illustrated Parts Catalogue (IPC-ME-C)
    MAN Energy Solutions
  • service_letter
    SL-ME Service Letters Collection (SL-ME)
    MAN Energy Solutions
  • technical_data
    MAN CEAS Engine Calculation Tool (CEAS)
    MAN Energy Solutions
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Equipment Model #38452 · ✓ still in production