Upgrade your Freightliner Cascadia with 345-3752 cylinder head. C13 ACERT 12.5L with VVA support. Not 245-4324. Trade pricing available for workshops
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The Ruich Value 345-3752 is a high-performance 12.5L cylinder head engineered for Caterpillar C13 ACERT engines. Fully VVA-ready, it features high-moly alloyed iron to withstand dual-turbo exhaust temperatures in Freightliner Cascadia, Kenworth T800, and Peterbilt 389 fleets. Trade pricing available for engine rebuilders.
The Caterpillar C13 ACERT 12.5L engine is a specialized powerhouse designed for high-efficiency highway logistics and heavy-duty excavation. At the structural peak of this twin-turbocharged platform, the Caterpillar C13 cylinder head (OEM 345-3752) is the critical interface for the advanced Variable Valve Actuator (VVA) system. Ruich Value supplies this precision-engineered top-end assembly to uphold Caterpillar’s rigid QDR (Quality, Durability, and Reliability) standards. Cast from proprietary high-moly alloy cast iron, our heads restore factory-spec thermal resilience and compression integrity for KCB, LEE, and JAM serial prefixes.
A primary technical pitfall for fleet managers is the 345-3752 vs 245-4324 mismatch. While the C13 and C15 heads appear similar, they differ significantly in bolt patterns and internal oil rail orientations; installing the wrong unit leads to immediate lubrication failure. Furthermore, original C13 castings often suffer from VVA mounting boss cracking due to incorrect torque procedures or extreme exhaust gas temperatures (EGTs) from the dual-turbo setup. Our replacement heads feature reinforced mounting bosses and optimized coolant passages to permanently resolve these chronic failures in heavy-haul Kenworth T800 cylinder head applications.
Engine rebuilders operating in the global heavy equipment network require uncompromised precision for 24-valve SOHC synchronization. Every 345-3752 unit, which cross-references to 10R-7661 and 294-1688, is 100% water jacket pressure tested and includes pre-installed stainless steel injector sleeves. Whether you are overhauling a Freightliner Cascadia engine head or maintaining a CAT 349D excavator, our factory-direct inventory provides the durability required to sustain peak torque while providing a cost-effective alternative to dealership markup.
| Parameter | Technical Value |
|---|---|
| Primary OEM Number | 345-3752 / 3453752 |
| Engine Compatibility | CAT C13 ACERT (12.5L Inline-6) |
| Technology Support | Dual-Turbo / VVA (Variable Valve Actuator) |
| Valve Configuration | SOHC, 24 Valves (4 per Cylinder) |
| Bore x Stroke | 130.0 mm x 157.0 mm |
| Compression Ratio | 17.3:1 (Verified ACERT Spec) |
| Material Grade | High-Moly Alloyed Gray Iron |
| Cross-Reference | 10R-7661, 294-1688, 10R-1310 |
Our heavy-duty cylinder head catalog extensively covers Caterpillar’s high-horsepower ACERT engine lineage. Explore our whole Caterpillar Categories for additional camshafts, C13 twin-turbochargers, and master 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 / Truck Model | Year Range | Engine | Application |
|---|---|---|---|---|
| Freightliner | Cascadia / Columbia / FLD | 2004–2009 | Caterpillar C13 | Class 8 Truck |
| Kenworth | T800 / W900 / T660 | 2004–2009 | Caterpillar C13 | Heavy Haulage |
| Peterbilt | 386 / 389 / 385 | 2004–2009 | Caterpillar C13 | Logistics |
| Caterpillar | 345C / 349D Excavators | 2005–2014 | CAT C13 ACERT | Earthmoving |
No. This is a common point of confusion: the 245-4324 is for the 15.2L C15 engine. While the C13 and C15 belong to the same SOHC ACERT family, the 345-3752 head is for the 12.5L block. The bolt patterns and internal oil rail passages for the Variable Valve Actuators are not interchangeable. Installing the wrong head will result in an immediate failure of the high-pressure oil circuit.
Cracking around the VVA mounting bosses is typically caused by over-torquing the actuator studs or harmonic vibrations from an imbalanced dual-turbo system. This failure leads to oil pressure loss and “VVA Not Responding” fault codes. Our new 345-3752 heads feature reinforced boss structures to distribute load more effectively than the original factory castings.
They share a similar casting architecture, but they are not always compatible. The C11 (11.1L) often utilizes different valve sizes and injector sleeve depths compared to the C13 (12.5L). You must verify the specific casting number stamped on your original head. For most heavy-duty applications requiring the 345-3752, it is optimized strictly for the increased flow requirements of the 12.5L ACERT platform.
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