FAW J6P Cylinder Block Assembly: The Ultimate 4-Core Deconstruction

Welcome to this expert deconstruction of the FAW J6P Cylinder Block Assembly, part number 1002015-36D. This is the absolute foundation of the engine for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. Its “logic” is to be the central chassis of the powertrain, containing the forces of combustion, housing the crankshaft, and providing the rigid backbone for the entire engine. This FAW J6P Cylinder Block Assembly is the bedrock of the powertrain.

The “design logic” of this specific FAW J6P Cylinder Block Assembly is centered on durability and serviceability. This is a “wet liner” engine block (see Comp 12, ‘Cylinder liner’). This “serviceability logic” is critical for heavy-duty applications, as it allows the cylinder walls to be replaced, enabling multiple “in-frame” rebuilds. This component is the bedrock; a failure here is a failure of the entire engine. The strength of the FAW J6P Cylinder Block Assembly is paramount.

This technical guide is an essential resource for engine rebuilders, fleet technicians, and parts managers. We will deconstruct the entire 27-component group, breaking it down into its four primary “logic” systems: the “Structural & Sealing” Logic (the block and liners), the “Rotational Support” Logic (bearings and seals), the “Housing & Interface” Logic (covers and flywheel housing), and the critical “Alignment & Fastener” Logic. This is the complete guide to the FAW J6P Cylinder Block Assembly.

Core 1: The “Structural & Sealing” Logic (Components 7, 11, 12)

This group forms the absolute core of the FAW J6P Cylinder Block Assembly. It defines the engine’s architecture, durability, and primary fluid containment.

1. Component: ‘Cylinder block assy’ (1002015-36D)
This is the primary component (Comp 7). Its “foundry logic” is immense strength. Cast from high-grade iron alloy, it features extensive internal ribbing to prevent flexing under load. Its “fluid logic” is a complex, cast-in “jacket” of coolant passages that surround the cylinders, and a separate “gallery” of passages that deliver high-pressure oil to the crankshaft and cylinder head. The “machining logic” is its precision: the “deck” (top surface) is milled perfectly flat to seal against the head gasket, and the “main” bores (for the crankshaft) are line-honed for perfect alignment. This entire FAW J6P Cylinder Block Assembly is the reference point for all other parts.

2. Components: ‘Cylinder liner’ (1002016-36D) & ‘O-ring seal-cylinder liner’ (1002017-29D)
This is the “serviceability logic.” This is a “wet liner” block, meaning the ‘Cylinder liner’ (Comp 12) is a separate, replaceable sleeve that is in direct contact with engine coolant. The “material logic” is superior: the liner is made of a different, centrifugally-cast iron alloy that is exceptionally hard and wear-resistant (for the piston rings), while the main FAW J6P Cylinder Block Assembly (Comp 7) is designed for structural strength. The ‘O-ring seals’ (Comp 11) are the most critical seals in the engine. Their “sealing logic” is to use multiple rings to create a watertight barrier, preventing high-pressure coolant from leaking into the oil sump, which would be a catastrophic failure. This wet-liner design means the engine can be “rebuilt” multiple times, a vital feature for a heavy-duty FAW J6P Cylinder Block Assembly.

Core 2: The “Rotational Support” Logic (Components 2, 3, 4, 5)

This group’s “logic” is to allow the crankshaft to rotate at thousands of RPM with minimal friction while remaining perfectly sealed. This is a primary function of the FAW J6P Cylinder Block Assembly.

1. Components: ‘Upper main bearing’ (1002034-36D) & ‘Lower main bearing’ (1002035-36D)
These are the “hydrodynamic” logic components. The crankshaft never physically touches the FAW J6P Cylinder Block Assembly. Instead, it “floats” on a microscopic film of high-pressure oil. The ‘Main bearings’ (Comp 4 & 5) are the precision-made, soft-metal shells that support this oil film. Their “sacrificial logic” means they are designed to be the “wear item.” If any debris contaminates the oil, it will embed in the soft bearing, protecting the far more expensive crankshaft and block from damage. The “upper” shell (Comp 5), placed in the block, takes the primary combustion force.

2. Components: ‘Crankshaft front oil seal seat’ (1002055-29D) & ‘Gasket’ (1002056-29D)
This is the “dynamic sealing” logic. Where the crankshaft “exits” the front of the FAW J6P Cylinder Block Assembly to drive the accessory belts, it must be sealed. The ‘Oil seal seat’ (Comp 2) is the precision-machined housing that bolts to the block. Its “logic” is to hold the (not-listed) rubber oil seal in perfect concentricity with the shaft. The ‘Gasket’ (Comp 3) provides the “static sealing” logic, creating a leak-proof join between the ‘seat’ and the flat face of the block. This entire sub-system is crucial to the FAW J6P Cylinder Block Assembly.

Core 3: The “Housing & Interface” Logic (Comp 9, 10, 16, 17, 21, 24, 26)

The bare FAW J6P Cylinder Block Assembly is just the start. This group of components “closes” the block and allows it to interface with other systems.

1. The “Interface” Logic: ‘Gear housing cover’ (1002076-36D) & ‘Gear housing cover-flywheel housing’ (1002061-59D)
These are the large, critical castings that define the front and rear of the engine. The ‘Gear housing’ (Comp 16, 17) bolts to the front of the FAW J6P Cylinder Block Assembly. Its “logic” is to cover the complex timing gear train, provide mounting points for accessories (like the injection pump), and seal the front of the engine. The ‘Flywheel housing’ (referenced by Comp 17, 23, 24, 26) bolts to the rear. Its “logic” is even more critical: it precisely aligns the entire engine with the transmission, and it provides the mounting point for the starter motor.

2. The “Service & Inspection” Logic: ‘Cover plate-camshaft chamber’ (1002092-29D) & ‘Gasket’ (1002096-29D)
This is the “serviceability” logic. The camshaft and valve lifters are located inside the main FAW J6P Cylinder Block Assembly (this is a cam-in-block engine). These ‘Cover plates’ (Comp 9) are removable panels. Their “logic” is to provide technicians with access to inspect and service the valvetrain components without removing the entire engine. The ‘Gaskets’ (Comp 10) are essential for sealing the oil inside this chamber.

3. The “Diagnostic & Fluid” Logic: (Comp 21, 24, 26)
These small parts serve critical functions. The ‘Gasket-turbocharger oil return’ (Comp 21) has a “fluid return logic,” allowing hot oil from the turbo to drain back into the oil sump, which is located below the FAW J6P Cylinder Block Assembly. The ‘Pointer’ (Comp 24) and ‘Plug’ (Comp 26) are the “diagnostic logic.” The ‘Pointer’ aligns with a mark on the flywheel, allowing a technician to set the engine’s timing. The ‘Plug’ (or inspection cover) allows for visual confirmation of the flywheel’s position.

Core 4: The “Alignment & Fastener” Logic (The Hardware)

This final group’s “logic” is to ensure perfect alignment and provide the immense clamping force needed to hold the engine together against vibration and combustion pressure. This is a critical support system for the FAW J6P Cylinder Block Assembly.

1. The “Alignment” Logic: ‘Dowel pin’ (Q5210826, Q5211232, Q5211020)
Bolts are *not* used for alignment. That is the “logic” of the ‘Dowel pins’ (Comp 6, 13, 14). These are hardened, precision-ground steel pins. They are pressed into the FAW J6P Cylinder Block Assembly and interface with matching holes in components like the flywheel housing or cylinder head. Their “logic” is to ensure perfect, sub-millimeter alignment *before* the bolts are tightened. This prevents misalignment that would destroy seals and bearings.

2. The “Clamping” Logic: ‘Hexagon flange bolt’ (Multiple) & ‘Double-ended stud’ (1002043-29D)
This is the “clamping force” logic. The system uses a high quantity of ‘Hexagon flange bolts’ (Comp 1, 8, 15, 19, 27). The “flange logic” is that the built-in washer distributes the clamping load, preventing the bolt head from cracking the casting. The ‘Double-ended studs’ (Comp 18, 22, 23) are used for high-stress, high-heat areas like the flywheel housing. The “stud logic” is superior for this: it provides more accurate torque, reduces wear on the FAW J6P Cylinder Block Assembly‘s threads, and better manages thermal expansion. This hardware is vital to the integrity of the FAW J6P Cylinder Block Assembly.

FAW J6P Cylinder Block Assembly Parts List & Specifications

The following table provides the complete, detailed breakdown of all 27 component types identified in the FAW J6P Cylinder Block Assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Cylinder Block Assembly are defined by its function as the structural foundation of the engine.