RTA58T
The WinGD RTA58T (RT‑flex58T) is a low‑speed, two‑stroke marine diesel main engine delivering up to ~30 MW per unit, distinguished by its large bore (580 mm), electronic common‑rail injection and fuel flexibility.
Engine Specifications
Inspector Detail
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Designation decoded
RTA stands for the Sulzer mechanically controlled series, 58 for 580 mm bore, T for long-stroke/tanker variant.
Background
The RTA58T is a medium-size mechanically controlled 2-stroke engine with 580 mm bore. Fitted to Panamax bulkers and tankers of the 1990s-2000s. Purely mechanical control with camshaft, injection pump and mechanical exhaust valve. Sulzer-specific bore (MAN: 600 mm).
Calculated metrics
Inspector checklist
- Cylinder liners: 580 mm bore. Long-term wear.
- Piston rings: Older generation.
- Crosshead bearings: Long-term fatigue.
- Camshaft: Cam profile, gear, chain/gearwheel.
- Injection pump: Plunger/barrel wear, delivery quantity.
- Exhaust valve: Mechanical. Pushrod, roller tappet.
- VIT: Free movement.
- Injection pump: Delivery pressure and timing.
- Nozzles: Opening pressure.
- Cat fines: <10 ppm.
- Stuffing box: Drainage.
- Exhaust valve: Spindle and seat.
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature after cylinder | 355-415 degrees C at 75% MCR | Spread >25 degrees C -> pump/timing |
| Pmax | 125-155 bar | Check VIT and pump |
| Injection pump delivery pressure | >800 bar | Pressure drop -> pump worn |
Common Failure Modes
Expert tips
- 💡 RTA58T with 580 mm bore is Sulzer-specific — do not confuse spare parts with the MAN 600 mm.
- 💡 Mechanical VIT on RTA: If the VIT piston sticks, the Pmax curve versus load will be off — a typical finding on older engines.
Related components
Classification & regulatory
IMO Tier I. EEXI for existing vessels.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Type-general inspection and maintenance points for this equipment category — not model-specific.
Service & Maintenance
Follow Sulzer/WinGD PMS. Mechanical injection timing, camshaft drive, scavenge space and liner condition require regular checks.
Suppliers & Spare Parts
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Manuals
- datasheet
- project_guide