Doosan 4V158TI Marine Engine Spare Parts
The Doosan 4V158TI marine engine is a heavy-duty V8 diesel engine designed for commercial marine propulsion applications.
Built around a 14.6-liter V8 platform, the 4V158TI combines mechanical fuel injection, turbocharging, intercooling and water cooling in a compact marine propulsion package.
The engine family has been offered in different duty ratings, which means a 4V158TI used continuously on a commercial vessel may not have the same rating or component arrangement as an engine intended for lighter-duty operation.
This makes correct engine identification important when ordering:
- Fuel Injectors
- Injection Pump Components
- Turbocharger Parts
- Intercooler Components
- Raw-Water Pumps
- Freshwater Pumps
- Heat Exchangers
- Cylinder Head Parts
- Pistons
- Cylinder Components
- Bearings
- Starter Motors
- Alternators
- Gaskets and Seals
Many engines currently in service have also undergone previous repairs.
A turbocharger, seawater pump, alternator or other component fitted today may not necessarily be the exact component originally installed on the engine.
For that reason, the safest method for identifying Doosan 4V158TI Marine Engine Spare Parts is:
Doosan 4V158TI + Engine Serial Number + Existing Part Number + Clear Photographs
Alfa Marine Spare Parts supports 4V158TI requirements for routine maintenance, engine repair and complete overhaul.
Depending on component and availability, supply options can include genuine parts, OEM-quality components, selected aftermarket alternatives and professionally rebuilt or remanufactured components.
1. What Is the Doosan 4V158TI Marine Engine?
The Doosan 4V158TI is an eight-cylinder V-type, four-stroke marine diesel engine.
Its general configuration includes:
- V8 Cylinder Arrangement
- Eight Cylinders
- Four-Stroke Diesel Operation
- Approximately 14.6-Liter Displacement
- Direct Fuel Injection
- Mechanical Fuel Control
- Turbocharging
- Intercooling / Charge-Air Cooling
- Water Cooling
- Commercial Marine Propulsion Configuration
The V8 configuration gives the engine a different component layout from Doosan inline-six marine engines.
This affects areas such as:
- Cylinder Head Arrangement
- Intake System
- Exhaust Manifolds
- Turbocharger Connections
- Cooling Pipes
- Valve-Train Components
- Engine Block Layout
2. Doosan 4V158TI Technical Information
Typical technical characteristics of the Doosan 4V158TI marine engine include:
Technical InformationDoosan 4V158TIEngine Model4V158TIEngine TypeMarine Diesel EngineCylinder ConfigurationV8Number of Cylinders8Operating CycleFour-StrokeDisplacementApprox. 14.6 LitersBoreApprox. 128 mmStrokeApprox. 142 mmFuel SystemMechanical Direct InjectionAspirationTurbocharged & IntercooledCoolingWater CooledApprox. Power Range390–588 kWApprox. Output Range530–800 PSApprox. Rated Speed Range1,800–2,300 rpmEmissionsIMO Tier IITypical ApplicationCommercial Marine Propulsion
Exact output depends on the specific duty rating and engine specification.
For replacement parts, always prioritize:
Engine Serial Number + Existing Component Identification
rather than relying only on a general technical specification.
3. What Does “4V158TI” Mean?
For spare-parts purposes, the important point is that the 4V158TI identifies a V-type turbocharged and intercooled marine engine configuration.
The engine uses a V8 cylinder arrangement rather than an inline configuration.
The airflow can be understood approximately as:
Air Filter → Turbocharger → Intercooler → Intake System → Cylinders
The turbocharger compresses the incoming air.
Compressed air becomes hotter.
The intercooler removes part of that heat before the air enters the cylinders.
This system introduces several important service components:
- Turbocharger
- Intercooler
- Charge-Air Cooler Core
- Charge-Air Pipes
- Charge-Air Hoses
- Intake Connections
- Turbocharger Oil Feed Components
- Turbocharger Oil Drain Components
- Cooling-Water Connections
- Turbocharger Gaskets
- Intercooler Gaskets
- Charge-Air Seals
- O-Rings
4. How Powerful Is the Doosan 4V158TI?
The 4V158TI has been offered at different marine duty ratings.
Typical output configurations are approximately:
Heavy-Duty Rating
390 kW / 530 PS at approximately 1,800 rpm
Medium-Duty Rating
441 kW / 600 PS at approximately 2,100 rpm
Higher-Output Rating
588 kW / 800 PS at approximately 2,300 rpm
This difference is important.
A 530 PS 4V158TI and an 800 PS 4V158TI should not automatically be treated as identical when ordering configuration-sensitive components.
Always confirm:
- Engine Serial Number
- Rated Power
- Rated RPM
- Existing Part Number
5. Why Does the 4V158TI Duty Rating Matter?
Marine engines can be selected according to how heavily and how frequently they operate.
A vessel that spends long periods working under substantial continuous load places different demands on an engine than a vessel that only requires maximum power for shorter periods.
Therefore, when ordering parts, it can be useful to know:
- Engine Rated Power
- Rated RPM
- Vessel Application
- Duty Profile
This becomes particularly important for components associated with:
- Turbocharging
- Fuel Delivery
- Cooling
- Exhaust
- Engine Loading
6. Where Is the Doosan 4V158TI Used?
The Doosan 4V158TI is associated with commercial marine propulsion applications such as:
- Commercial Fishing Vessels
- Fishing Boats
- Passenger Boats
- Fishing Excursion Vessels
- Workboats
- Utility Craft
- Service Boats
- Commercial Marine Craft
- Repower Applications
Engines used in these applications can operate for long periods under significant load.
That makes reliable maintenance of the following systems especially important:
- Fuel System
- Turbocharger
- Intercooler
- Raw-Water Cooling
- Freshwater Cooling
- Heat Exchanger
- Lubrication System
- Exhaust System
7. What Doosan 4V158TI Spare Parts Can Be Required?
Spare-parts requirements can range from routine service components to complete engine-overhaul parts.
Fuel-System Parts
Potential requirements can include:
- Fuel Injectors
- Injector Nozzles
- Injector Seals
- Injector Hardware
- Injection Pump Components
- Fuel Filters
- Fuel Supply Components
- Fuel Pipes
- Fuel Connections
- Pump Seals
- Gaskets
- O-Rings
8. Doosan 4V158TI Turbocharger Parts
Potential requirements can include:
- Complete Turbochargers
- Turbocharger Cartridges
- Compressor Components
- Compressor Wheels
- Turbine Components
- Bearings
- Seals
- Oil Feed Components
- Oil Drain Components
- Intake Connections
- Exhaust Connections
- Turbocharger Gaskets
- Mounting Components
The exact turbocharger should be identified from the currently installed unit whenever possible.
9. Doosan 4V158TI Intercooler Parts
Potential requirements can include:
- Complete Intercoolers
- Charge-Air Cooler Cores
- Intercooler Housings
- End Covers
- Charge-Air Pipes
- Charge-Air Hoses
- Cooling-Water Connections
- Intercooler Gaskets
- O-Rings
- Charge-Air Seals
- Mounting Components
10. Doosan 4V158TI Cooling-System Parts
Potential requirements can include:
- Freshwater Pumps
- Raw-Water Pumps
- Raw-Water Pump Impellers
- Thermostats
- Thermostat Housings
- Heat Exchangers
- Cooling Pipes
- Cooling Hoses
- Mechanical Seals
- Gaskets
- O-Rings
Marine cooling components should be identified carefully because vessel installations can differ.
11. Doosan 4V158TI Lubrication-System Parts
Potential requirements can include:
- Engine Oil Pumps
- Oil Pump Components
- Engine Oil Filters
- Oil Cooler Components
- Oil Pressure Components
- Turbocharger Oil Lines
- Front Crankshaft Seals
- Rear Crankshaft Seals
- Gaskets
- O-Rings
12. Doosan 4V158TI Cylinder Head and Valve Parts
Potential requirements can include:
- Cylinder Head Components
- Cylinder Head Gaskets
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Valve Springs
- Rocker Components
- Valve Cover Gaskets
- Related Valve-Train Components
Because the 4V158TI uses a V8 configuration, correct engine and cylinder-bank arrangement should be confirmed for configuration-sensitive parts.
13. Doosan 4V158TI Internal Engine Parts
Potential requirements can include:
- Pistons
- Piston Rings
- Piston Pins
- Cylinder Liners / Cylinder Components
- Connecting Rods
- Main Bearings
- Connecting Rod Bearings
- Thrust Components
- Crankshaft
- Camshaft Components
- Timing Components
- Gaskets
- Oil Seals
14. Doosan 4V158TI Electrical Parts
Potential requirements can include:
- Starter Motors
- Starter Solenoids
- Alternators
- Charging Components
- Wiring Components
- Electrical Connections
- Related Engine Electrical Parts
15. Why Is Correct 4V158TI Parts Identification Important?
Imagine a marine engineer sends:
“Need seawater pump for Doosan 4V158TI.”
That gives us useful information.
But we may still need:
- Engine Serial Number
- Existing Pump Manufacturer
- Existing Pump Number
- Mounting Arrangement
- Hose Connection Arrangement
- Clear Photographs
Why?
Because the engine may have undergone previous repairs or modifications.
The currently installed pump may have been:
- Rebuilt
- Replaced
- Modified
- Changed During Previous Overhaul
- Substituted With Another Compatible Unit
The same principle applies to:
- Fuel Injectors
- Injection Pumps
- Turbochargers
- Intercoolers
- Heat Exchangers
- Freshwater Pumps
- Starter Motors
- Alternators
16. What Information Should I Send for Doosan 4V158TI Parts?
Provide:
- Engine Model: Doosan 4V158TI
- Engine Serial Number
- Engine Rated Power
- Rated RPM
- Photograph of Engine Identification Plate
- Existing Part Number
- Component Manufacturer Number
- Casting Number Where Available
- Quantity Required
- Clear Photographs
- Vessel Application
- Delivery Country or Port
For major external components, identification directly from the installed component is particularly useful.
17. What Information Should I Send for a 4V158TI Turbocharger?
Provide:
- Engine Serial Number
- Engine Rated Power
- Turbocharger Manufacturer
- Turbocharger Model
- Turbocharger Part Number
- Identification Plate Photograph
- Compressor-Side Photograph
- Turbine-Side Photograph
- Oil Feed Connection
- Oil Drain Connection
- Intake Connection
- Exhaust Connection
Do not rely only on:
“Turbocharger for Doosan 4V158TI.”
The number from the existing turbocharger can make identification considerably more reliable.
18. What Information Should I Send for a 4V158TI Intercooler?
Provide:
- Engine Serial Number
- Existing Intercooler Number
- Casting Numbers
- Complete Intercooler Photograph
- Air Inlet
- Air Outlet
- Cooling-Water Connections
- Mounting Arrangement
- Dimensions Where Necessary
If the cooler has previously been replaced, identification from the installed unit becomes particularly important.
19. What Information Should I Send for a 4V158TI Raw-Water Pump?
Provide:
- Engine Serial Number
- Engine Rated Power
- Existing Pump Manufacturer
- Existing Pump Number
- Complete Pump Photograph
- Drive Arrangement
- Mounting Arrangement
- Inlet Connection
- Outlet Connection
Do not assume every 4V158TI marine installation uses exactly the same external seawater arrangement.
20. What If the 4V158TI Part Number Cannot Be Read?
This is common on older marine engines.
Identification plates and markings can become:
- Corroded
- Painted Over
- Scratched
- Oil Covered
- Dirt Covered
- Heat Damaged
- Partially Missing
Do not immediately discard the old component.
Photograph:
- Complete Component
- Front
- Rear
- Both Sides
- Identification Plate
- Casting Numbers
- Mounting Arrangement
- Fuel Connections
- Oil Connections
- Cooling Connections
- Intake Connections
- Charge-Air Connections
- Exhaust Connections
- Electrical Connections Where Applicable
Several physical details together can sometimes help identify the correct replacement.
21. Doosan 4V158TI Fuel Injector Parts
Potential requirements can include:
- Complete Fuel Injectors
- Injector Nozzles
- Injector Seals
- Injector Hardware
- Related Fuel-System Components
Injector condition affects:
- Starting
- Combustion
- Cylinder Balance
- Engine Power
- Exhaust Smoke
- Fuel Consumption
22. What Are Possible Signs of a 4V158TI Injector Problem?
Possible symptoms include:
- Difficult Starting
- Rough Idle
- Uneven Running
- Increased Exhaust Smoke
- Reduced Engine Power
- Increased Fuel Consumption
- Abnormal Combustion Noise
- Cylinder-to-Cylinder Temperature Differences
These symptoms do not automatically prove the injector has failed.
Other possible causes include:
- Poor Fuel Supply
- Injection Pump Problems
- Low Compression
- Intake Valve Leakage
- Exhaust Valve Leakage
- Piston Ring Wear
- Cylinder Wear
- Turbocharger Problems
- Intercooler Problems
23. One 4V158TI Cylinder Is Weak — Does It Need an Injector?
Possibly.
But investigate the complete cylinder first.
Check:
- Injector Condition
- Fuel Delivery
- Injection Pump Operation
- Compression
- Intake Valve
- Exhaust Valve
- Piston Rings
- Cylinder Condition
A fuel injector cannot correct mechanical compression loss.
24. Should All Eight 4V158TI Injectors Be Replaced Together?
Not automatically.
If one cylinder has a problem, diagnose that cylinder first.
If testing shows that several injectors have reached a similar condition, servicing or replacement as a set may then be appropriate.
The practical principle is:
Test first → Decide second.
25. Doosan 4V158TI Injection Pump Parts
Potential requirements can include:
- Complete Injection Pump
- Injection Pump Components
- Pump Elements
- Pump Seals
- Fuel Supply Components
- Fuel Pipes
- Fuel Connections
- Gaskets
- O-Rings
Identification from the currently installed injection equipment should be provided whenever possible.
26. Why Is My Doosan 4V158TI Difficult to Start?
Possible causes include:
- Weak Batteries
- Slow Cranking
- Poor Battery Connections
- Restricted Fuel Filters
- Air Entering the Fuel System
- Poor Fuel Supply
- Injector Problems
- Injection Pump Problems
- Low Compression
- Valve-Sealing Problems
A practical diagnostic sequence is:
Cranking Speed → Fuel Supply → Injection → Compression
27. Why Does the 4V158TI Lose Power Under Load?
An engine can start correctly.
It can idle smoothly.
Then the vessel begins working and the engine struggles to reach expected power.
Possible causes include:
- Restricted Fuel Filters
- Poor Fuel Supply
- Air Entering the Fuel System
- Injector Problems
- Injection Pump Problems
- Restricted Air Intake
- Turbocharger Problems
- Charge-Air Leakage
- Intercooler Fouling
- Exhaust Leakage
- Exhaust Restriction
- Low Compression
- Hull Fouling
- Propeller Fouling
- Excessive Propeller Load
At idle, demand is relatively low.
Under load, demand increases for:
Fuel + Air + Boost + Cooling + Exhaust Flow
28. Why Should the Fuel Filters Be Checked First?
A partly restricted fuel filter may still provide enough fuel for:
- Starting
- Idling
- Light-Load Running
Once load increases, fuel demand also increases.
The engine may then:
- Lose RPM
- Accelerate Slowly
- Produce More Smoke
- Lose Power
- Struggle Under Load
Basic fuel-supply checks should come before expensive injection-system repairs.
29. Doosan 4V158TI Air-Intake Parts
Potential requirements can include:
- Air Filter Elements
- Air Cleaner Components
- Intake Hoses
- Intake Pipes
- Turbocharger Inlet Components
- Charge-Air Pipes
- Charge-Air Hoses
- Clamps
- Intake Gaskets
- Charge-Air Gaskets
- Seals
30. Why Can Restricted Airflow Cause Black Smoke?
A diesel engine requires sufficient air for efficient combustion.
When airflow becomes restricted, possible symptoms can include:
- Black Smoke
- Reduced Power
- Poor Load Response
- Increased Exhaust Temperature
- Increased Fuel Consumption
Before making major fuel-system adjustments, confirm that the complete intake path is clean and unrestricted.
31. Doosan 4V158TI Turbocharger Inspection
Possible turbocharger warning signs include:
- Reduced Boost
- Reduced Engine Power
- Poor Load Response
- Black Smoke
- Higher Exhaust Temperature
- Abnormal Turbocharger Noise
- Oil Leakage
- Increased Oil Consumption
These symptoms should be evaluated together with:
- Fuel System
- Air Intake
- Intercooler
- Charge-Air System
- Exhaust System
32. Does Black Smoke Mean the 4V158TI Turbocharger Is Bad?
No.
Black smoke can also result from:
- Restricted Air Filter
- Intake Restriction
- Charge-Air Leakage
- Intercooler Fouling
- Injector Problems
- Injection Pump Problems
- Exhaust Problems
- Low Compression
- Excessive Engine Load
The turbocharger is only one possible cause.
33. Why Can a Healthy Turbocharger Appear Weak?
Because the compressed air can escape after leaving the turbocharger.
Possible leak points include:
- Charge-Air Hoses
- Pipe Connections
- Clamps
- Intercooler Connections
- Gaskets
- Seals
The turbocharger may be producing pressure correctly while the cylinders are not receiving all of the compressed air.
34. Why Is Turbocharger Lubrication Important?
The turbocharger operates at very high rotational speed.
Its bearing system depends on clean, reliable lubrication.
Poor oil supply can contribute to:
- Bearing Wear
- Shaft Damage
- Overheating
- Oil Leakage
- Turbocharger Failure
When turbocharger damage occurs, investigate both the oil feed and oil drain before installing another unit.
35. Doosan 4V158TI Intercooler Inspection
Possible intercooler problems include:
- Air-Side Fouling
- Oil Deposits
- Salt Deposits
- Scale
- Corrosion
- Restricted Cooling Flow
- Charge-Air Leakage
- Damaged Seals
Both sides matter:
Charge-Air Side + Cooling-Water Side
36. What Are Possible Signs of a 4V158TI Intercooler Problem?
Possible symptoms include:
- Reduced Power
- Increased Black Smoke
- Poor Load Response
- Higher Exhaust Temperature
- Higher Charge-Air Temperature
- Increased Fuel Consumption
- Cooling-Water Leakage
A restricted intercooler can make a healthy turbocharger appear weak.
37. Doosan 4V158TI Cooling-System Parts
Potential requirements can include:
- Freshwater Pumps
- Raw-Water Pumps
- Raw-Water Pump Impellers
- Thermostats
- Heat Exchangers
- Intercooler Cooling Components
- Cooling Pipes
- Cooling Hoses
- Mechanical Seals
- Gaskets
- O-Rings
38. Why Is My Doosan 4V158TI Overheating?
Possible causes include:
- Low Coolant Level
- Coolant Leakage
- Thermostat Problems
- Freshwater Pump Wear
- Restricted Cooling Passages
- Heat Exchanger Fouling
- Intercooler Cooling Restriction
- Reduced Raw-Water Flow
- Restricted Sea Strainer
- Damaged Raw-Water Pump Impeller
- Restricted Cooling Hoses
- Excessive Engine Load
The complete cooling circuit should be considered.
39. Why Does the 4V158TI Overheat Mainly Under Load?
At idle, engine heat production is relatively low.
Under propulsion load:
More Fuel → More Combustion → More Boost → More Heat → Greater Cooling Demand
A cooling system with reduced capacity can therefore appear normal at idle but struggle when the vessel works harder.
40. Doosan 4V158TI Freshwater Pump Parts
Potential requirements can include:
- Complete Freshwater Pumps
- Pump Housings
- Pump Shafts
- Bearings
- Mechanical Seals
- Impellers
- Gaskets
- O-Rings
A freshwater pump can lose efficiency without immediately producing a large external coolant leak.
41. Can a 4V158TI Freshwater Pump Be Worn Without Leaking?
Yes.
Possible internal deterioration includes:
- Impeller Wear
- Impeller Damage
- Internal Corrosion
- Bearing Wear
- Reduced Pumping Efficiency
A dry pump exterior does not automatically mean coolant circulation is healthy.
42. Doosan 4V158TI Raw-Water Pump Parts
Depending on marine configuration, potential requirements can include:
- Complete Raw-Water Pumps
- Flexible Impellers Where Applicable
- Pump Covers
- Pump Shafts
- Bearings
- Mechanical Seals
- Gaskets
- O-Rings
43. What If the 4V158TI Raw-Water Pump Impeller Has Missing Blades?
Do not simply install a new impeller.
Search for the missing pieces.
Inspect:
- Pump Outlet
- Seawater Hoses
- Heat Exchanger Inlet
- Heat Exchanger Passages
- Intercooler Cooling Passages
- Other Downstream Coolers
Missing impeller fragments can continue restricting seawater flow.
44. Doosan 4V158TI Heat Exchanger Parts
Potential requirements can include:
- Complete Heat Exchangers
- Heat Exchanger Cores
- Housings
- End Covers
- Cooling Connections
- Gaskets
- O-Rings
- Seals
45. Why Can the Heat Exchanger Work at Idle but Struggle Under Load?
A partly restricted heat exchanger may still remove sufficient heat at low engine output.
Under load, heat production rises.
Possible restrictions include:
- Salt Deposits
- Scale
- Sediment
- Marine Growth
- Corrosion
- Impeller Fragments
- Reduced Raw-Water Flow
This is why overheating only under load often deserves closer heat-exchanger and seawater-circuit inspection.
46. Doosan 4V158TI Lubrication-System Parts
Potential requirements can include:
- Engine Oil Pumps
- Oil Pump Components
- Oil Filters
- Oil Cooler Components
- Oil Pressure Components
- Turbocharger Oil Lines
- Front Crankshaft Seals
- Rear Crankshaft Seals
- Gaskets
- O-Rings
47. What Can Cause Low 4V158TI Oil Pressure?
Possible causes include:
- Low Oil Level
- Incorrect Lubricating Oil
- Deteriorated Oil
- Fuel Dilution
- Restricted Oil Filter
- Oil Pump Wear
- Pressure-Regulating Problems
- Main Bearing Wear
- Connecting Rod Bearing Wear
- Crankshaft Wear
- Incorrect Pressure Indication
Actual pressure should be confirmed before major mechanical components are replaced.
48. What If the 4V158TI Oil Level Starts Rising?
If nobody is adding oil but the level increases, investigate contamination.
Possible causes include:
- Fuel Entering the Crankcase
- Coolant Entering the Crankcase
Fuel dilution reduces lubricant viscosity.
Coolant contamination can seriously reduce bearing protection.
49. Doosan 4V158TI Cylinder Head Parts
Potential requirements can include:
- Cylinder Head Components
- Cylinder Head Gaskets
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Valve Springs
- Rocker Components
- Valve Cover Gaskets
- Related Hardware
Because the engine uses a V8 configuration, exact engine and bank arrangement should be confirmed where applicable.
50. What Should Be Inspected During 4V158TI Cylinder Head Repair?
Inspect:
- Cracking
- Corrosion
- Flatness
- Sealing Surfaces
- Intake Valves
- Exhaust Valves
- Valve Seats
- Valve Guides
- Injector Seating Areas
- Cooling Passages
- Previous Machining
- Heat Damage
Inspection should determine whether components can be:
Reused → Reconditioned → Repaired → Replaced
51. Why Can a New 4V158TI Head Gasket Fail Again?
Because the gasket may be the result of another problem.
Possible underlying causes include:
- Engine Overheating
- Cylinder Head Distortion
- Cooling-System Restriction
- Damaged Sealing Surfaces
- Incorrect Assembly
A complete repair addresses:
Failure + Root Cause
52. Doosan 4V158TI Internal Engine Parts
Potential requirements can include:
- Pistons
- Piston Rings
- Piston Pins
- Cylinder Liners / Cylinder Components
- Connecting Rods
- Main Bearings
- Connecting Rod Bearings
- Thrust Components
- Crankshaft
- Camshaft Components
- Gaskets
- Oil Seals
53. Does Excessive Blow-By Mean the 4V158TI Only Needs New Rings?
No.
Possible causes include:
- Piston Ring Wear
- Cylinder Wear
- Piston Wear
- Ring-Groove Wear
- Internal Damage
Cylinder condition should be inspected and measured before deciding what components are required.
54. Why Should 4V158TI Cylinders Be Measured During Overhaul?
Visual inspection can reveal:
- Scoring
- Surface Damage
- Heavy Wear
Measurement can reveal:
- Cylinder Diameter
- Taper
- Out-of-Round Condition
A better overhaul approach is:
Inspect → Measure → Decide → Order
55. Doosan 4V158TI Crankshaft and Bearing Parts
Potential requirements can include:
- Crankshaft
- Main Bearings
- Connecting Rod Bearings
- Thrust Components
- Connecting Rods
- Front Crankshaft Seal
- Rear Crankshaft Seal
56. Why Should Bearing Size Be Confirmed?
A previously overhauled engine may already have undergone crankshaft machining.
The crankshaft may have been:
- Polished
- Repaired
- Machined
- Replaced
Before ordering bearings, measure:
- Main Journal Diameter
- Connecting Rod Journal Diameter
- Taper
- Out-of-Round
- Surface Condition
Measure first → Select bearings second.
57. Doosan 4V158TI Starter Motor Parts
Potential requirements can include:
- Complete Starter Motors
- Starter Solenoids
- Starter Components
- Electrical Connections
- Mounting Components
If the 4V158TI cranks slowly, do not automatically replace the starter motor.
Check:
- Batteries
- Battery Charge
- Battery Terminals
- Battery Cables
- Engine Grounds
- Starter Connections
58. Doosan 4V158TI Alternator Parts
Potential requirements can include:
- Complete Alternators
- Alternator Components
- Drive Components
- Pulleys
- Electrical Connections
- Mounting Hardware
Repeated battery problems should lead to inspection of the complete charging system.
59. Doosan 4V158TI Gaskets and Seals
Potential requirements can include:
- Complete Engine Gasket Sets
- Partial Gasket Sets
- Cylinder Head Gaskets
- Valve Cover Gaskets
- Intake Gaskets
- Charge-Air Gaskets
- Intercooler Gaskets
- Exhaust Gaskets
- Turbocharger Gaskets
- Freshwater Pump Gaskets
- Raw-Water Pump Gaskets
- Oil Pump Gaskets
- Fuel-System Seals
- Cooling-System O-Rings
- Front Crankshaft Seals
- Rear Crankshaft Seals
60. Doosan 4V158TI Complete Overhaul Parts
Depending on engine condition, overhaul requirements can include:
- Pistons
- Piston Rings
- Piston Pins
- Cylinder Liners / Cylinder Components
- Main Bearings
- Connecting Rod Bearings
- Thrust Components
- Connecting Rods
- Cylinder Head Components
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Complete Gasket Set
- Crankshaft Seals
- Fuel Injectors
- Injection Pump Components
- Turbocharger Components
- Intercooler Components
- Freshwater Pump Components
- Oil Pump Components
More extensive rebuild requirements may include:
- Crankshaft
- Camshaft Components
- Cylinder Head Components
- Complete Turbocharger
- Complete Intercooler
- Injection Pump
- Freshwater Pump
- Raw-Water Pump
- Heat Exchanger
- Starter Motor
- Alternator
61. Should I Order a Complete 4V158TI Overhaul Kit Before Opening the Engine?
Some known maintenance components can be prepared beforehand.
For major internal parts, final selection should ideally follow dismantling, inspection and measurement.
Determine:
- Cylinder Condition
- Piston Condition
- Crankshaft Condition
- Bearing Requirement
- Cylinder Head Condition
- Valve Condition
- Turbocharger Condition
- Intercooler Condition
- Fuel-System Condition
- Cooling-System Condition
A practical overhaul sequence is:
Identify → Diagnose → Disassemble → Clean → Inspect → Measure → Confirm Parts → Rebuild
62. Genuine Doosan 4V158TI Parts
Depending on availability, Alfa Marine Spare Parts can support selected genuine Doosan 4V158TI Marine Engine Spare Parts requirements.
63. OEM-Quality Doosan 4V158TI Parts
Depending on component and availability, OEM-quality alternatives may be available for selected:
- Fuel-System Components
- Turbocharger Components
- Intercooler Components
- Cooling Components
- Pumps
- Filters
- Bearings
- Electrical Components
- Internal Engine Parts
64. Aftermarket Doosan 4V158TI Parts
Depending on component and required specification, selected aftermarket alternatives may be available for:
- Filters
- Gaskets
- Seals
- Bearings
- Pistons
- Piston Rings
- Cylinder Components
- Cooling Components
- Pump Components
- Turbocharger Components
- Intercooler Components
- Maintenance Parts
- Selected Internal Engine Parts
Compatibility should always be confirmed against the exact 4V158TI specification.
65. Remanufactured Doosan 4V158TI Components
Depending on availability, professionally rebuilt or remanufactured options may be available for selected:
- Fuel Injectors
- Injection Components
- Turbochargers
- Cylinder Head Components
- Starter Motors
- Alternators
- Pumps
66. Who Do We Supply?
Alfa Marine Spare Parts supports Doosan 4V158TI Marine Engine Spare Parts requirements for:
- Shipyards
- Ship Repairers
- Marine Engineers
- Chief Engineers
- Technical Superintendents
- Fleet Operators
- Marine Service Companies
- Commercial Fishing Companies
- Fishing Vessel Operators
- Workboat Operators
- Offshore Operators
- Government Fleets
- Maritime Contractors
- Boat Builders
- Marine Equipment Distributors
- Commercial Vessel Operators
67. Worldwide Doosan 4V158TI Spare Parts Supply
Alfa Marine Spare Parts supports Doosan 4V158TI Marine Engine Spare Parts requirements across major marine markets, including:
- Spain
- Netherlands
- Italy
- Monaco
- France
- Belgium
- Germany
- Greece
- United Kingdom
- Dubai / UAE
- Nigeria
- Miami / Florida
- Texas
- Toronto / Canada
- Caribbean
- Central America
- South America
- Other Major International Seaports
68. Why Choose Alfa Marine Spare Parts for Doosan 4V158TI Parts?
Alfa Marine Spare Parts supports Doosan 4V158TI marine engine parts requirements for:
- Routine Maintenance
- Fuel-System Repair
- Turbocharger Repair
- Intercooler Repair
- Cooling-System Repair
- Cylinder Head Repair
- Crankshaft Repair
- Internal Engine Repair
- Complete Engine Overhaul
For accurate identification, provide:
Doosan 4V158TI + Engine Serial Number + Rated Power + Existing Part Number + Clear Photographs
For turbochargers, intercoolers, pumps, fuel-injection equipment, heat exchangers, starter motors and alternators, identification from the currently installed component is particularly useful.
69. What Information Should I Send for Doosan 4V158TI Parts?
Please provide:
Engine Model: Doosan 4V158TI
Engine Serial Number:
Rated Power:
Rated RPM:
Required Part:
Existing Part Number:
Quantity:
Vessel/Application:
Delivery Country/Port:
Attach clear photographs of the engine identification plate and required component whenever possible.