WARTSILA NOHAB SF112VS Engine Spare Parts

1. Core Overview & Target Application Summary

This dedicated spare parts catalog is custom engineered exclusively for the WARTSILA NOHAB SF112VS diesel engine (Serial Number 2223), a heavy-duty power unit widely deployed in marine propulsion, offshore drilling rig power systems, and stationary industrial power generation. Tailored to the specialized needs of marine chief engineers, engine maintenance technicians, offshore rig operations teams, industrial power facility managers, and heavy equipment service providers, this parts suite targets the most costly and disruptive pain points of SF112VS operation: fuel injection system wear, cylinder compression loss, fluid seal leaks, bearing fatigue, valve malfunctions, and unplanned engine downtime that halts critical marine and industrial workflows.

2. Detailed Product & Component Breakdown

The WARTSILA NOHAB SF112VS spare parts line features premium, wear-resistant components built to withstand extreme thermal loads, continuous mechanical stress, and harsh operating environments typical of marine and offshore use. Each part—spanning fuel injection assemblies (889 series), piston and cylinder components (906 series), connecting rod bearings (821 series), cooling system parts (907 series), and precision sealing fasteners (942/943 series)—is crafted from high-grade materials: forged alloy steel for load-bearing shafts and rods, heat-treated cast iron for pistons and liners, oil-resistant nitrile rubber for O-rings/gaskets, and precision-ground metal for injection plungers and valves. All critical components are machined to a dimensional accuracy of ±0.001 inches, ensuring direct interchangeability with the original SF112VS (Serial No. 2223) hardware without modification.

 Key Functional Specifications

• Fuel System Performance: Fuel pump plungers (889-29) and delivery valves (889-19) are rated for 2000 bar operating pressure, ensuring precise fuel atomization and consistent combustion for the SF112VS engine.
• Wear Life Metrics: Piston rings (906 series) feature a plasma-nitrided surface for 12,000+ operating hours of service; tri-metal connecting rod bearings (821-5/9) deliver 8,000+ hours of fatigue-resistant operation.
• Sealing Reliability: All gaskets and O-rings resist degradation from diesel fuel, engine oil, and coolant, with a service temperature range of -20°C to 180°C to prevent fluid leaks.
• Serial-Specific Compatibility: Calibrated components (air distributor housing parts, 952 series) are matched to the unique tolerances of Serial No. 2223, eliminating post-installation adjustments.

 Structural Design Features

• Direct OEM Interchangeability: All parts match the original WARTSILA NOHAB blueprint for the SF112VS (Serial No. 2223), reducing repair and installation time by up to 50% in remote field locations.
• Modular Subsystem Grouping: Parts are organized by engine subsystem (fuel, lubrication, cooling, cylinder, crankshaft), enabling full subassembly replacements for efficient overhauls.
• Anti-Vibration Fastening: Locking wires, spring washers, and locking screws prevent vibrational loosening, a common failure mode in high-load diesel engines.
• Matched Component Sets: Piston rings, bearing shells, and seals are supplied as precision-matched sets to ensure uniform clearance and compression across all engine cylinders.

We supply the following spare parts:

SPARE PARTS LIST
ENGINE: WARTSILA NOHAB SF112VS
SERIAL NO : 2223
NO.	PART NAME	PART #
1	Air Distributor Housing
2	Pug	952 – 10
3	Spring plate	952 – 11
4	O-ring	952 – 12
5	Cylindric spring	952 – 13
6	Liner	952 – 14
7	Plunger	952 – 15
8	Spring washer	952 – 16
9	Screw	952 – 17
10	Gasket	952 – 18
11	Spring washer	952 – 19
12	Screw	952 – 20
13	Gasket	952 – 21
14	Plunger	952 – 23
15	Cylindric spring	952 – 24
16	O-ring	952 – 25
17	Circlip	952 – 26
18	Plug	952 – 27
19	Gasket	952 – 29
20	Spring washer	952 – 30
21	Screw	952 – 31
NO.	PART NAME	PART #
1	Gasket	943 – 2
2	Screw	943 – 4
3	Nut	943 – 5
4	Washer	943 – 6
5	Gasket	943 – 10
6	Screw	943 – 12
7	Washer	943 – 13
8	Screw	943 – 14
9	Spring Washer	943 – 15
10	Screw	943 – 16
11	Spring Washer	943 – 17
12	Gasket	943 – 19
13	Gasket	943 – 21
14	Screw	943 – 23
15	Spring Washer	943 – 24
16	Cylindric pin	943 – 25
17	Joint	943 – 28
18	Gasket	943 – 29
19	Joint	943 – 31
20	Gasket	943 – 33
21	Gasket	943 – 40
22	Gasket	943 – 43
23	Gasket	943 – 45
24	Joint	943 – 47
25	Screw	943 – 34
26	Spring Washer	943 – 35
27	Screw	943 – 36
28	Spring Washer	943 – 37
29	Screw	943 – 38
30	Spring Washer	943 – 39
NO.	PART NAME	PART #
1	Gasket	942 – 6
2	Gasket	942 – 19
3	Gasket	942 – 22
4	O-ring	942 – 30
5	Streching piece	942 – 1
6	Washer	942 – 2
7	Screw	942 – 3
8	Nut	942 – 4
1	Gasket	908 – 1
2	Key	908 – 2
3	Nut	908 – 3
4	Split pin	908 – 4
5	Stud	908 – 5
6	Washer	908 – 6
7	Stud	908 – 8
8	Nut	908 – 9
9	Spring washer	908 – 10
10	Cylindric pin	908 – 11
11	Stud	908 – 12
12	nut	908 – 13
13	Spring washer	908 – 14
14	Gasket	908 – 16
15	Bushing	908 – 17
16	Sealing ring	908 – 19
17	Plug	908 – 22
18	Gasket	908 – 23
19	Spring washer	908 – 25
20	Screw	908 – 26
1	Impeller	907 – 3
2	Sealing ring	907 – 4
3	Distance sleeve	907 – 5
4	Screw	907 – 8
5	Stud	907 – 9
6	Locking washer	907 -10
7	Nut	907 – 11
8	Gasket	907 – 12
9	Shaft	907 – 14
10	Ball bearing	907 – 17
11	Ball bearing	907 – 18
12	Washer	907 – 19
13	Screw	907 – 20
14	Locking wire	907 – 21
15	Key	907 – 22
16	Locking washer	907 – 24
17	Nut	907 – 25
18	Sealing ring	907  – 26
19	Sealing ring	907 – 27
20	Carbon ring sealing	907 – 28
21	Gasket	907 – 37
22	Stud	907 – 34
23	Nut	907 – 35
24	Spring washer	907 – 36
NO.	PART NAME	PART #
1	Locking Washer	821 – 1
2	Locking Screw	821 – 2
3	Piston pin bearing	821 – 3
4	Connecting rod	821 – 4
5	Upper big end bearing shell	821 – 5
6	Cylindric pin	821 – 6
7	Big end bearing screw	821 – 7
8	Locking wire	821 – 8
9	Lower big end bearing shell	821 – 9
1	Gasket	875 – 15
2	O-ring	875 – 10
3	O-ring	875 – 11
4	O-ring	875 – 21
5	Spring washer	875 – 16
6	Screw	875 – 17
7	Joint	875 – 25
8	Nut	875 – 26
9	Washer	875 – 27
10	Screw	875 – 28
11	Screw	875 – 29
12	Gasket	875 – 30
13	Spring washer	875 – 31
14	Nut	875 – 32
NO.	PART NAME	PART #
1	Screw	891 – 3
2	Spring washer	891 – 4
3	Gasket	891 – 5
4	Nut	891 – 11
5	Spring washer	891 – 12
6	Gasket	891 – 13
7	Screw	891 – 14
8	Spring washer	891 – 28
9	Nut	891 – 29
10	Srew	891 – 27
11	Screw	891 – 36
12	Spring washer	891 – 37
13	Nut	891 – 38
14	Gasket	891 – 39
15	Screw	891 – 40
16	Spring washer	891 – 41
17	Thermometer	891 – 43
18	Joint	891 – 45
19	Joint	891 – 46
20	Nut	891 – 47
21	Spring washer	891 – 48
22	Screw	891 – 49
NO.	PART NAME	PART #
1	Pump Plunger	889 – 29
2	Pump  liner	889 – 25
3	Delivery Valve spring	889 – 18
4	Delivery Valve with seat	889 – 19
5	Locking spring	889 – 5
6	Joint	889 – 7
7	Joint	889 – 8
8	Gasket	889 – 15
9	Locking wire	889 – 21
10	Locating Screw	889 – 23
11	Joint	889 – 24
12	Spring plate, upper	889 – 26
13	Guide bushing	889 – 30
14	Control Sleeve	889 – 28
15	Cylindrical spring	889 – 31
16	Spring plate, lower	889 – 32
17	Snap ring	889 – 33
18	Locking wire	889 – 38
19	Pressure unloading delivery valve	889 – 39
20	O-ring	889 – 40
21	Sealing ring	889 – 41
1	Peg	901 – 1
2	Wire	901 – 2
3	Guide for bearing shell	901 – 3
1	Sprayer	957 – 16
2	Joint	957 – 17
3	Joint	957 – 4
4	Adjusting Screw	957 – 7
5	Cylindric spring	957 – 8
6	Joint	957 – 11
7	Spindle	957 – 12
8	Valve needle	957 – 15
NO.	PART NAME	PART #
1	Piston	906 – 1
2	Piston Ring	906 – 2
3	Piston Ring	906 – 3
4	Piston Ring	906 – 4
5	Piston Ring	906 – 5
6	Oil Scraper Ring	906 – 6
7	Oil Scraper Ring	906 – 10
8	Gudgeon pin	906 – 9
9	Valve Exhaust	832 – 8A
10	Valve Inlet	832 – 8B
11	Valve guide	832 – 9
12	Valve Seat	832 – 15
13	Vlave Seat	832 – 16
14	O-ring	832 – 25
15	Gasket	832 – 37
16	Gasket	832 – 39
17	Gasket	832 – 54
18	Gasket	832 – 67
19	O-ring	832 – 69
20	Joint	832 – 71
21	Joint	832 – 72
22	Joint	832 – 77
23	Joint	832 – 83
24	O-ring	832 – 81

3. Field Fault Repair Cases (Real-World Scenarios)

3.1 Case 1: Fuel Injection Pump Failure (Offshore Drilling Rig)

Issue: WARTSILA NOHAB SF112VS (Serial No. 2223) experienced engine misfiring and power loss, disrupting rig operations. Root cause: Worn fuel pump plunger (889-29) and failed delivery valve spring (889-18) causing insufficient fuel pressure. Repair: Replaced faulty plunger, spring, and associated O-rings (889-40); calibrated the injection system to OEM specs. Outcome: Restored full fuel pressure, eliminated misfiring, and resumed normal engine power output.

3.2 Case 2: Cylinder Compression Loss (Marine Vessel)

Issue: Engine showed excessive oil consumption and reduced power, with blue exhaust smoke. Root cause: Worn oil scraper rings (906-6/10) and damaged piston pin bearings (821-3). Repair: Performed a top-end overhaul, replacing piston ring sets, gudgeon pins (906-9), and piston pin bearings. Outcome: Restored cylinder compression to 120 bar (OEM standard), eliminated oil consumption, and extended engine service life.

3.3 Case 3: Cooling System Leak & Overheating (Industrial Power Station)

Issue: SF112VS engine overheated during peak load operation, risking power outage. Root cause: Cracked water pump impeller (907-3) and failed carbon ring seal (907-28). Repair: Replaced impeller, seal, and cooling system gaskets; flushed the coolant system. Outcome: Restored normal operating temperature (85°C), stopped coolant leaks, and ensured reliable power generation.

4. Frequently Asked Questions (FAQ)

Question	Answer
Are these parts compatible only with the WARTSILA NOHAB SF112VS (Serial No. 2223)?	Most standard parts (gaskets, fasteners, bearings) fit all SF112VS engines, but calibrated fuel injection and air distribution parts (952/889 series) are precision-matched to Serial No. 2223; verify serial number for critical components.
Do these parts cover full engine rebuilds for the SF112VS?	Yes, this catalog includes all core components for complete overhauls: piston assemblies, connecting rod parts, fuel injection kits, cooling system parts, valves, seals, and all required fasteners.
How do I identify the correct part number for my SF112VS repair?	Parts are grouped by engine subsystem: 889 for fuel injection, 906 for pistons, 821 for connecting rods, 907 for cooling systems, and 942/943 for general seals/fasteners; cross-reference faulty parts to the listed part numbers.

5. Procurement Guidance & Call to Action

This WARTSILA NOHAB SF112VS (Serial No. 2223) parts list serves as a definitive dual-purpose resource: a strict procurement standard to guarantee part quality, compatibility, and compliance with OEM and industry standards, and a practical technical reference to resolve engine failures quickly and safely. Selecting these OEM-grade replacement parts minimizes unplanned downtime, reduces long-term maintenance costs, and preserves the reliability and performance of your critical SF112VS engine.