For marine and industrial power, the 223-7263 cylinder head delivers high thermal resilience. Fits C18 18.1L SOHC in 988H loaders. Wholesale distribution ready
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The Ruich Value 223-7263 is an OEM-spec aftermarket cylinder head featuring a Single Overhead Cam (SOHC) architecture for the Caterpillar C18 18.1L engine. Designed for extreme marine and power generation duty, it resolves spacer plate fretting and fits CAT 988H loaders and C18 marine vessels. Wholesale distribution ready.
The Caterpillar C18 18.1L engine is the industrial gold standard for high-horsepower marine propulsion and prime power generation. Unlike traditional pushrod engines, this platform utilizes a SOHC cylinder head configuration to manage the high-pressure MEUI (Tier 3) or Common Rail (Tier 4) fuel systems. Ruich Value supplies the OEM-spec 223-7263 assembly, featuring the reinforced 274-1953 casting, to uphold the rigid QDR (Quality, Durability, and Reliability) standards required for heavy-duty earthmoving. Whether you are maintaining a C18 marine cylinder head for a tugboat or overhauling a 988H loader, our heads restore factory-spec 16.0:1 compression and thermal stability.
Extended operation in continuous-duty environments often leads to catastrophic failures, specifically head gasket failure and coolant-oil mixing. These issues are frequently triggered by spacer plate fretting, where micro-vibrations at the block-to-head interface allow combustion gases to compromise the seal. Furthermore, the intense EGTs found in 800HP+ applications can cause thermal fatigue cracking between the valve seats. Our replacement 223-7263 heads are cast from high-nickel alloy iron with a precision-machined combustion deck, providing the structural integrity needed to survive the extreme pressures of an 18.1L diesel engine.
Marine mechanics and fleet managers operating in the wholesale Caterpillar head market require uncompromised precision for 24-valve OHC setups. Every 223-7263 unit, which cross-references to 10R-8885 and 263-5055, is 100% pressure tested and vacuum checked for valve seat integrity. Whether you are restoring a standby generator or performing a 988H wheel loader cylinder head repair, our factory-direct pricing eliminates dealer overhead while ensuring your flagship Caterpillar C18 assets return to service with OEM-equivalent durability.
| Parameter | Technical Value |
|---|---|
| Primary OEM Number | 223-7263 / 2237263 |
| Casting Number | 274-1953 |
| Engine Compatibility | Caterpillar C18 ACERT (18.1L) |
| Valve Train Type | Single Overhead Cam (SOHC) |
| Material Grade | High-Nickel Alloy Iron |
| Bore x Stroke | 145 mm x 183 mm (5.7″ x 7.2″) |
| Valve Configuration | 24 Valves (4 per Cylinder) |
| Compression Ratio | 16.0:1 (Verified OEM Spec) |
| Cross-Reference | 10R-8885, 263-5055, 277-8240 |
Our heavy-duty industrial top-end catalog covers the most powerful engines in the Caterpillar lineup. Explore our complete Caterpillar Categories for matching rotating assemblies, C18 injectors, and complete 18.1L overhaul kits.
| Model | Part No. | Type | Remark |
|---|---|---|---|
| 3304PC | 8N1188 | PC | Pre-Combustion. Fits 3304 PC only. |
| 3304DI | 1N4304 | DI | Direct Injection. Fits 3304 DI only. |
| 3306PC | 8N1187 | PC | Pre-Combustion. Fits 3306 PC only. |
| 3306DI | 8N6796 | DI | Direct Injection. Corrected from 8N1187. |
| 3406PC | 110-5097 | PC | Pre-Combustion. For early 3406 engines. |
| 3406DI | 110-5096 | DI | Rectangle Port. Fits 3406B / Early C15. |
| 3406C | 110-5096 | DI | Round Port. Fits late 3406C. |
| 3406E | 176-9918 | DI | Specific for 3406E. Check casting number. |
| 3408A | 7N0858 | PC | Pre-Combustion. Fits 3408 w/ Glow Plugs. |
| 3408B | 7W2225 | DI | Direct Injection. Fits 3408B. |
| 3412A | 7N0848 | PC | Pre-Combustion. Fits 3412 w/ Glow Plugs. |
| 3412B | 7W2243 | DI | Direct Injection. Fits 3412B. |
| C7 | 219-5843 | DI | Common Rail Fuel System. |
| C9 | 332-3619 | DI | Fits C9. Casting # 3117226. |
| C12 | 132-3252 | DI | Marine & Truck applications. |
| C13 | 345-3752 | DI | Acert Technology. |
| 3406E / Late C15 | 110-5096 | DI | Fits 3406E & Early C15 (6NZ). Single Turbo. |
| C15 Acert | 245-4324 | DI | Fits C15 Acert (Twin Turbo) & C18. |
| C18 | 223-7263 | DI | Single Overhead Cam. Fits C18 & late C15. |
| 3116 | 140-7373 | DI | Mechanical Unit Injector (MUI). |
| D342 (D8K) | 8N6000 | PC | Application: D8K Bulldozer. |
| D342 (D8H) | 8N6004 | PC | Application: D8H Bulldozer. |
| 3208 | 6I2378 | DI | Naturally Aspirated (NA). |
| Make | Machine / Vessel Model | Year Range | Engine | Application |
|---|---|---|---|---|
| Caterpillar | 988H / 988K / 988F | 2005–2015 | CAT C18 ACERT | Mining Wheel Loader |
| Caterpillar | 631G / 637G Scrapers | 2003–2012 | CAT C18 ACERT | Heavy Construction |
| Caterpillar | C18 Marine Tugs / Ferries | 2002–Present | CAT C18 | Marine Propulsion |
| Caterpillar | Prime / Standby Generators | 2004–Present | CAT C18 | Power Generation |
The C18 utilizes a Single Overhead Cam (SOHC) design, meaning the camshaft sits directly in the cylinder head rather than the engine block. This architecture eliminates long pushrods, allowing for the precise actuation of the 24 valves and MEUI injectors required for high-output ACERT technology. Understanding this SOHC cylinder head distinction is vital, as it requires specific camshaft journal lubrication compared to pushrod-style engines like the C12.
The C18 engine utilizes a steel spacer plate between the block and the head. Spacer plate fretting or the presence of even microscopic debris between these surfaces prevents the 223-7263 head from exerting uniform clamping force. This is a leading cause of head gasket failure. We recommend meticulous cleaning of both the block surface and the spacer plate before final assembly.
The 18.1L diesel engine C18 head features a 4-valve per cylinder configuration (2 Intake, 2 Exhaust), totaling 24 valves for the inline-6 arrangement. Every valve is controlled by the overhead camshaft via specialized rocker arms. Proper valve lash adjustment is mandatory to ensure the high-output ACERT platform maintains its rated 16.0:1 compression ratio and peak torque.
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