The crankcase assembly is the very heart of your engine’s structural integrity, the bedrock upon which every ounce of power is built. The 1001957802 crankcase assembly from HOWO is engineered to provide an unyielding, precision-machined foundation for your engine’s rotating and reciprocating components, ensuring unparalleled durability, exceptional thermal stability, and flawless performance under the most punishing conditions. As a critical Howo/Sitrak truck parts component, this crankcase assembly, also known as an engine block assembly, is manufactured from high-strength cast iron with precision-machined cylinder bores and main bearing journals, forming the rigid backbone that houses the crankshaft, pistons, and cylinders[reference:0]. Whether you are rebuilding a worn engine or replacing a damaged block, the 1001957802 guarantees a perfect factory fit, superior structural integrity, and the reliable performance that professional workshops and fleet operators worldwide have come to trust.
The crankcase assembly serves as the primary structural foundation of your diesel engine, housing all major internal rotating and reciprocating components[reference:1]. The 1001957802 is specifically designed to withstand the extreme combustion pressures, thermal cycling stresses, and continuous dynamic loading encountered during demanding heavy-duty commercial vehicle operations[reference:2]. This assembly contains the cylinder bores where combustion occurs, the main bearing journals that support the crankshaft, and the water jacket passages for engine cooling circulation[reference:3]. A compromised crankcase can lead to catastrophic engine failure, making the choice of a genuine, high-quality replacement paramount. HOWO has engineered this crankcase assembly with a meticulously controlled alloy composition, providing exceptional compressive strength and natural vibration damping characteristics[reference:4]. With the 1001957802, you are not just replacing a part; you are restoring the very structural integrity of your engine, ensuring maximum power output, reduced vibration, and extended service life for your valuable asset.
Structural Core
Unshakeable Foundation
Thermal Stability
Withstands Extreme Heat
OEM Grade
Genuine HOWO
Precision Cast
High-Strength Iron
The 1001957802 crankcase assembly is manufactured to the highest OEM standards, incorporating advanced casting and machining technologies. Below are the comprehensive technical specifications for this essential engine foundation component.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 1001957802 | Exact Match |
| Part Name | Crankcase Assembly / Engine Block Assembly[reference:5] | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13[reference:6] | Heavy-Duty Diesel Engines |
| Material | High-Strength Cast Iron[reference:7] | Excellent Compressive Strength |
| Manufacturing Process | Precision Casting, CNC Machining[reference:8] | High Dimensional Accuracy |
| Function | Engine Structural Foundation[reference:9] | Houses Crankshaft, Pistons, Cylinders |
| Surface Protection | Corrosion-Resistant Enamel Coating[reference:10] | Protects Against Oil & Moisture |
| Cylinder Bore Diameter | 120 mm (MC11) / 126 mm (MC13)[reference:11] | Precision-Machined |
| Bearing Journal | Precision-Machined Main Bearing Journals[reference:12] | Supports Crankshaft |
| Quality Verification | Dimensional Inspection, Pressure Testing[reference:13] | Ensures Casting Integrity |
| Warranty | 12 Months | Manufacturer Guarantee |
The 1001957802 crankcase assembly is produced using a combination of advanced precision casting and state-of-the-art CNC machining processes[reference:14]. The high-strength gray cast iron is carefully formulated with a controlled alloy composition to provide exceptional compressive strength for containing combustion pressures while offering natural vibration damping characteristics to reduce engine noise and harshness[reference:15]. The block undergoes rigorous quality verification, including dimensional inspection, pressure testing for casting integrity, and material hardness testing from each production batch[reference:16].
The precision-machined cylinder bores of the 1001957802 provide the precise surface finish and dimensional accuracy required for proper piston ring sealing and efficient combustion operation[reference:17]. The block’s design incorporates internal oil galleries that distribute lubricating oil to all critical bearing surfaces, ensuring proper lubrication of the crankshaft, connecting rods, and piston assemblies[reference:18]. The corrosion-resistant engine enamel coating provides long-term protection against oil degradation byproducts, road salt exposure, and environmental moisture[reference:19]. The material selection for this crankcase assembly prioritizes both high compressive strength for combustion pressure containment and excellent thermal stability across extreme temperature ranges[reference:20]. Each unit is validated through extensive finite element analysis and full-scale engine durability testing to ensure it meets the highest reliability standards[reference:21].
The 1001957802 crankcase assembly is specifically designed for HOWO heavy-duty trucks equipped with the MAN-derived MC11 and MC13 engine series[reference:22]. These engines are widely used in popular models such as the HOWO T7H and A7[reference:23]. The assembly directly replaces the original crankcase with identical dimensions, mounting points, and bore specifications, ensuring a seamless installation without modifications. The crankcase is compatible with all factory-specified internal components, including the crankshaft, pistons, connecting rods, and cylinder liners[reference:24].
This crankcase assembly is also compatible with many Sinotruk and other commercial vehicles that share the same engine architecture[reference:25]. To confirm fitment, always cross-reference the OEM number on your existing crankcase with 1001957802. If they match, this component will integrate seamlessly. Keeping this crankcase assembly in your spare parts inventory enables rapid engine rebuilds, minimising downtime and ensuring your engine foundation is as robust and reliable as the day it left the factory.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
MC11/MC13
Engine Series
Direct Replacement
No Modifications
Replacing a damaged, cracked, or excessively worn crankcase with the 1001957802 restores the proper structural integrity of your engine[reference:26]. The new assembly provides a rigid, dimensionally stable foundation that ensures all critical components are held in precise alignment, reducing wear on bearings, pistons, and cylinder walls[reference:27]. The improved structural rigidity translates to reduced vibration, quieter operation, and enhanced overall engine reliability. The precision-machined cylinder bores and bearing journals ensure that all components fit perfectly, minimizing friction and maximizing power output. The corrosion-resistant coating protects the block from the damaging effects of road salt, moisture, and oil degradation products, extending the service life of your engine[reference:28]. For fleet operators, a reliable crankcase assembly reduces the risk of catastrophic engine failure, lowers maintenance costs, and helps maintain the performance and efficiency of your vehicles. By investing in the 1001957802, you ensure that your HOWO engine delivers the power, reliability, and durability that professional drivers and fleet operators depend on.
Installing the 1001957802 crankcase assembly is a complex, labor-intensive procedure that should only be performed by a qualified engine builder with specialized tooling and experience. Replacement of the engine block assembly requires complete engine disassembly, including removal of the cylinder head, pistons, crankshaft, and all attached components before transfer[reference:29]. Begin by thoroughly cleaning the engine bay and preparing a clean, dust-free work area. Carefully inspect all components for wear or damage, and replace any parts that do not meet specifications. When installing the new crankcase, ensure that all dowel pins and locating surfaces are clean and free from debris. Apply a thin layer of engine assembly lubricant to all critical surfaces. Install the crankshaft, main bearings, and caps, torquing the main bearing bolts to the manufacturer’s specification using a calibrated torque wrench and angle gauge. Install the pistons and connecting rods, ensuring proper orientation and ring gap clearance. Reassemble the cylinder head, timing components, and all ancillary systems. Fill the engine with the correct grade of oil and coolant. Prime the oil system and check for proper oil pressure before starting the engine. After installation, monitor the engine for any unusual noises or leaks, and perform a thorough break-in procedure. With proper installation, the 1001957802 will provide years of reliable, trouble-free service.
Pro Tip: When installing a new crankcase assembly, always use new main bearing bolts, connecting rod bolts, and all associated gaskets and seals. The 1001957802 is a precision foundation; using new, high-quality hardware ensures that critical fasteners achieve the correct clamp load and torque retention for a reliable, long-lasting engine rebuild.
Genuine HOWO components are engineered to the highest standards, and the 1001957802 crankcase assembly is no exception. Aftermarket crankcases often use inferior materials, inconsistent casting processes, or imprecise machining, leading to poor fitment, reduced structural integrity, and premature failure. HOWO’s crankcase assembly is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 1001957802, you benefit from HOWO’s rigorous testing, including dimensional inspection, pressure testing for casting integrity, and material hardness testing[reference:30]. This ensures that the crankcase meets the demanding requirements of heavy-duty trucking. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase and long-term peace of mind.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which vehicles use the 1001957802 crankcase assembly?
A: The 1001957802 is designed for HOWO T7H, A7, and other models equipped with MC11 or MC13 engines, as well as many Sinotruk trucks with the same engine architecture[reference:31].
Q: What are the signs of a failing crankcase assembly?
A: Visible cracks in the engine block, persistent oil or coolant leaks from the block, low oil pressure, engine overheating, and excessive engine vibration or knocking are common indicators of a compromised crankcase.
Q: Can I replace just the crankcase without a full engine rebuild?
A: No, replacing the crankcase assembly requires complete engine disassembly, including removal of the cylinder head, pistons, crankshaft, and all attached components[reference:32]. This is a full engine rebuild procedure and should only be performed by a qualified professional.
Q: How do I verify the correct part?
A: Check the OEM number on your existing crankcase or engine block. If it matches 1001957802, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 1001957802 Crankcase Assembly today! Explore our complete selection of genuine HOWO and Sinotruk engine components at Howo/Sitrak truck parts and ensure your engine is built on the strongest possible foundation.
The 1001957802 Crankcase Assembly from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine is built on a foundation of strength, durability, and reliability, capable of delivering the power and performance demanded by modern heavy-duty trucking. Whether you are a professional engine builder or a fleet manager, this crankcase assembly offers the structural integrity, precision fit, and lasting performance that you can count on. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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