Product Description
The 94-01 Overhaul Gasket Kit (Part-1) for Mitsubishi S12R-MPTA engines is a complete set of OEM-equivalent sealing components designed for full engine teardown and rebuild projects. This kit includes a comprehensive assortment of heat-resistant gaskets, high-durability O-rings, precision sealing washers, and valve stem seals, all manufactured from premium materials: aramid-reinforced fiber for gaskets, nitrile butadiene rubber (NBR) for O-rings, and heat-stabilized fluoropolymer for valve stem seals. Each part is laser-inspected for fit and function to match the original Mitsubishi part numbers, guaranteeing direct installation without modification. This kit eliminates the hassle of sourcing individual seals and gaskets separately, serving as both a reliable procurement standard and a technical reference for resolving sealing-related engine faults, such as oil leakage, coolant loss, and reduced cylinder compression.
Functional Specifications
- Sealing Performance: Delivers zero-leak sealing for oil, coolant, and compressed air systems, with a friction coefficient optimized for high-temperature engine operation; valve stem seals prevent oil intrusion into combustion chambers, maintaining 736KW rated power output.
- Material Durability: Resists oil degradation, coolant corrosion, and thermal fatigue, with a service life of 8,000+ operating hours under normal maintenance conditions.
- Compatibility: Exact fit for all S12R-MPTA engine sealing interfaces, including cylinder heads, turbochargers, oil pans, rocker cases, and cylinder liners, covering 100% of critical sealing points for full overhaul.
- Load Resistance: Withstands peak cylinder pressure and vibration stress common in 1450 RPM continuous operation, preventing seal extrusion and premature wear.
Structural Characteristics
All components feature a precision-engineered structure tailored to the S12R-MPTA’s V12 cylinder design: multi-layered gaskets for high-pressure joints, molded O-rings with uniform cross-sections for consistent compression, and beveled seal washers for leak-proof flange connections. The kit’s modular layout groups components by engine assembly area (cylinder head, turbocharger, lubrication system, cooling system), simplifying inventory management and speeding up overhaul workflows. Valve stem seals are designed with a dual-lip construction to reduce friction and wear on valve stems, while liner O-rings feature a thick-wall design to resist installation damage and maintain long-term sealing integrity.
Applicable Operating Conditions
These Mitsubishi S12R-MPTA overhaul parts are engineered for extreme heavy-duty environments, including:
- Offshore drilling rigs and marine auxiliary power generation units with continuous 1450 RPM operation
- Saltwater marine environments with high humidity and corrosive spray
- Industrial power plants and stationary generator sets requiring 736KW constant power output
- High-load, continuous-duty operations with minimal downtime tolerance
- Temperature extremes from cold offshore climates to heated industrial engine bays
Maintenance & Overhaul Recommendations
- Overhaul Timing: Perform full engine overhaul using this kit every 12,000 operating hours or as needed when leaks, compression loss, or fluid contamination occurs.
- Installation Protocol: Clean all sealing surfaces thoroughly before installation; torque fasteners to Mitsubishi’s specified values (range: 25-120 Nm) to ensure uniform compression and prevent seal damage.
- Post-Installation Testing: Conduct pressure testing of cooling and lubrication systems (8-10 bar for 30 minutes) to verify leak-free performance; check cylinder compression to confirm restoration to OEM standards (15-16 bar).
- Inspection Schedule: Inspect all seals and gaskets every 2,000 operating hours for signs of wear, cracking, or deformation; replace damaged components immediately to avoid catastrophic engine failure.
- Storage Guidelines: Store unused parts in a cool, dry environment (10-25°C) away from direct sunlight and chemical exposure to preserve rubber and fiber integrity.
We supply the following spare parts:
MITSUBISHI TYP S12R-MPTA 1450 RPM, 736 KW, 2001
94-01 OVERHAUL, GASKET KIT (PART-1)
Pos. Part No. Part Name Qty.
1. 37794-80210 GASKET KIT, OVERHAUL 1 MITSUBISHI TYP S12R-MPTA
101 37755-10300 GASKET 2 MITSUBISHI TYP S12R-MPTA
102 05507-00200 O-RING 12 MITSUBISHI TYP S12R-MPTA
103 37807-06200 PACKING 2 MITSUBISHI TYP S12R-MPTA
104 05507-20600 O-RING 6 MITSUBISHI TYP S12R-MPTA
105 F3153-04000 O-RING 12 MITSUBISHI TYP S12R-MPTA
106 F3153-07500 O-RING 5 MITSUBISHI TYP S12R-MPTA
107 F3156-09500 O-RING 3 MITSUBISHI TYP S12R-MPTA
108 F3156-03000 O-RING 16 MITSUBISHI TYP S12R-MPTA
109 05507-20450 O-RING 2 MITSUBISHI TYP S12R-MPTA
110 F3156-06000 O-RING 4 MITSUBISHI TYP S12R-MPTA
111 F3156-08000 O-RING 7 MITSUBISHI TYP S12R-MPTA
112 F3156-12500 O-RING 2 MITSUBISHI TYP S12R-MPTA
113 F4202-27000 GASKET 5 MITSUBISHI TYP S12R-MPTA
114 05507-10200 O-RING 2 MITSUBISHI TYP S12R-MPTA
115 05507-10460 O-RING 4 MITSUBISHI TYP S12R-MPTA
116 05507-20300 O-RING 2 MITSUBISHI TYP S12R-MPTA
117 05946-01201 WASHER, SEALING 22 MITSUBISHI TYP S12R-MPTA
118 05946-02001 WASHER, SEALING 6 MITSUBISHI TYP S12R-MPTA
119 05946-03601 WASHER, SEALING 2 MITSUBISHI TYP S12R-MPTA
120 30625-50501 GASKET 1 MITSUBISHI TYP S12R-MPTA
121 35A30-00100 O-RING 4 MITSUBISHI TYP S12R-MPTA
122 32532-01700 GASKET, JOINT 24 MITSUBISHI TYP S12R-MPTA
123 33504-10300 SEAL, VALVE STEM 48 MITSUBISHI TYP S12R-MPTA
124 35A32-30100 GASKET, TURBOCHARGER 2 MITSUBISHI TYP S12R-MPTA
125 37107-04200 O-RING, LINER 12 MITSUBISHI TYP S12R-MPTA
126 37107-04300 O-RING, LINER 24 MITSUBISHI TYP S12R-MPTA
127 37232-09100 GASKET, TURBOCHARGER 2 MITSUBISHI TYP S12R-MPTA
128 37432-14700 RING, SEAL 8 MITSUBISHI TYP S12R-MPTA
129 37501-02200 GASKET, CYLINDER HEAD 12 MITSUBISHI TYP S12R-MPTA
130 37504-21200 PACCKING, ROCKER CASE 12 MITSUBISHI TYP S12R-MPTA
131 37504-56200 O-RING, ROCKER CASE 12 MITSUBISHI TYP S12R-MPTA
132 37507-32400 O-RING, LINER 12 MITSUBISHI TYP S12R-MPTA
133 37507-37300 O-RING 12 MITSUBISHI TYP S12R-MPTA
134 37525-03600 O-RING 2 MITSUBISHI TYP S12R-MPTA
135 37530-00200 PACKING 12 MITSUBISHI TYP S12R-MPTA
136 37507-37600 O-RING 12 MITSUBISHI TYP S12R-MPTA
137 37532-10500 GASKET, EXHAUST 12 MITSUBISHI TYP S12R-MPTA
138 37555-00600 GASKET 3 MITSUBISHI TYP S12R-MPTA
139 37707-07200 PACKING, SIDE COVER 1 MITSUBISHI TYP S12R-MPTA
140 37711-10200 PACKING, REAR 1 MITSUBISHI TYP S12R-MPTA
141 37711-03200 PACKING 2 MITSUBISHI TYP S12R-MPTA
142 37711-25400 PACKING, REAR 1 MITSUBISHI TYP S12R-MPTA
143 37713-00200 PACKING, OIL PAN 1 MITSUBISHI TYP S12R-MPTA
144 37725-20600 PACKING 1 MITSUBISHI TYP S12R-MPTA
145 37725-30200 PACKING, FRONT 1 MITSUBISHI TYP S12R-MPTA
146 37725-40400 PACKING, FRONT 1 MITSUBISHI TYP S12R-MPTA
147 37730-11500 PACKING, DUCT 4 MITSUBISHI TYP S12R-MPTA
148 37732-10900 GASKET, EXHAUST 12 MITSUBISHI TYP S12R-MPTA
149 05507-00340 O-RING 3 MITSUBISHI TYP S12R-MPTA
DIESEL ENGINE
MITSUBISHI TYP S12R-MPTA 1450 RPM, 736 KW, 2001
On-Site Engine Fault Repair Cases
Case 1: S12R-MPTA Engine Cylinder Head Oil Leak
An offshore drilling generator experienced severe oil leakage from the cylinder head assembly of a Mitsubishi S12R-MPTA engine, causing low oil pressure alarms. Technicians replaced the 37501-02200 cylinder head gaskets and associated O-rings from the overhaul kit, resolving the leak and restoring normal oil pressure. The engine resumed full 736KW power output within 6 hours, eliminating unplanned rig downtime.
Case 2: Coolant Contamination Due to Failed Liner Seals
A marine auxiliary S12R-MPTA engine showed coolant mixing with engine oil, a critical fault risking engine seizure. Inspection revealed degraded cylinder liner O-rings (37107-04200 & 37107-04300). Installing replacement liner O-rings from the kit sealed the coolant system, preventing cross-contamination and extending the engine’s service life by 8,000+ hours.
Case 3: Turbocharger Seal Leak & Power Loss
A stationary S12R-MPTA engine experienced reduced power output and excessive exhaust smoke due to a failed turbocharger gasket. Replacing the 35A32-30100 and 37232-09100 turbocharger gaskets restored turbo boost pressure, eliminating power loss and returning the engine to its rated 1450 RPM operating speed.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Is this overhaul kit compatible only with the 2001 Mitsubishi S12R-MPTA 736KW 1450RPM engine? | Yes, this kit is precision-designed exclusively for the 2001 Mitsubishi TYP S12R-MPTA engine with 736KW power and 1450 RPM speed, matching all OEM part numbers and sealing interface dimensions for perfect fit. |
| Can individual components from this kit be purchased separately for partial repairs? | Absolutely. Each gasket, O-ring, seal washer, and valve stem seal in the kit is available as a standalone replacement part, ideal for targeted partial repairs without purchasing the full overhaul set. |
| What materials are used in these seals, and do they meet marine industry standards? | Components use heat-resistant NBR, aramid-reinforced fiber, and fluoropolymer materials that comply with ABS and DNV marine standards, offering excellent oil/coolant resistance and durability in harsh offshore conditions. |
Procurement Guidance & Closing Statement
For maintenance and procurement teams responsible for Mitsubishi S12R-MPTA 736KW 1450RPM engines, this overhaul gasket kit and individual replacement parts set the standard for reliable, cost-effective engine maintenance. Backed by strict quality testing and OEM-aligned specifications, these components serve as both a trusted procurement benchmark and a technical troubleshooting reference for sealing-related engine faults. Whether tackling a full engine overhaul or addressing urgent leak repairs, these parts ensure compliance with industrial and marine operational standards, minimize downtime, and preserve the long-term performance of your critical power unit. Secure the exact Mitsubishi S12R-MPTA overhaul parts you need, tailored to your engine’s exact specifications and maintenance requirements, to keep your operations running smoothly and efficiently.
