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Caterpillar
3512C Marine
The Caterpillar 3512C (M32C) is a 12‑cylinder, 4‑stroke V-type marine diesel engine delivering up to 1 380 kW at 1 800 rpm, known for its electronic unit injection and ACERT emission technology.
1380.0 kW
Power
Engine Specifications
12
Cylinders
170 mm
Bore
190 mm
Stroke
1,380 kW
MCR Power
1800.0 rpm
MCR RPM
4-stroke
Stroke Type
Family: Caterpillar Cat 3500 Series
· Tier: IMO Tier II
· Fuel: MDO, MGO
Other Cylinder Configurations 2
Components & Design
Engine Control Unit (ECU / ECS)
Caterpillar
Cat 3516 ECM (Electronic Control Module)
Full-authority ADEM ECM controls injection timing, fuel quantity, and engine protection. Keep spare ECM on board.
Lead time: 4 wk
8.0 kg
Fuel Valve (Injector Nozzle)
Caterpillar
Cat 3516 MEUI Unit Injector
Mechanically-actuated, electronically-controlled unit injector (MEUI). Replace at 8,000-12,000 hrs or per oil analysis.
Lead time: 3 wk
6.0 kg
Scavenge Air Cooler (SAC)
Caterpillar
Cat 3516 Aftercooler (SCAC)
Separate-circuit aftercooler (SCAC). Clean air side at 4,000 hrs. Pressure test coolant side annually.
Lead time: 6 wk
120.0 kg
Technical Data
Bohrung
320 mm
Hub (Reihe)
480 mm
Hub (V-Form VM32C)
480 mm (teilweise Quellen: 420 mm, Widerspruch in Sekundärdatenbanken)
Typ
4-Takt Langsamläufer, Mittelschnellläufer, direkte Einspritzung, Turbogefeuert
Brennstoff
MDO, LBF, HFO, Ultra-Low-Sulphur Fuel (75% der Flotte auf HFO)
Einführungsjahr
1994
Turbolader
Hocheffiziente Ausführung, korrosionsfreies Gehäuse ohne Wasserkühlung
Abgasnorm
IMO Tier II (IMO II)
Marktabsatz
1600+ Einheiten seit 1994 (80% Propulsion, 20% Genset)
unified from engine model
True
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Common failures & inspection points
SFOC-Spezifikation und Boost-Druck: Unterschiedliche Effizienzwerte je nach Ausführung und Lastbereich dokumentiert (177–179 g/kWh); Optimierung des Brennstoffv
Turbolader-Verschleiß: Hocheffiziente Ausführung mit 'low wear rate due to calibration ring' wird beschrieben; langlebig konstruiert, aber spezifische Verschlei
Brennstoff-Qualität: Bei HFO-Betrieb erforderlich — Verunreinigungen und Schwefelgehalt sind Risiken; 75% der Flotte läuft auf HFO, daher hohes Managementrisiko
Lagerschale-Überwachung: Caterpillar bietet optionales 'Crankshaft Bearing Condition Monitoring System' an — deutet auf Lagerverschleiß als Inspektionsthema hin
Kühlsystem-Korrosion bei Seewassereinlass: Hinweise auf typische marine Korrosion bei Kühlanlagen mit Seewasserkühlung; Anoden und Spülung erforderlich
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
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Equipment Model #38051
· ✓ still in production