FAW J6P Engine Mount: The 4-Core Essential Guide to NVH & Torque

Welcome to the definitive expert analysis of the FAW J6P Engine Mount system, the critical assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 diesel dump truck. This is not a simple guide to brackets; it is a deconstruction of a highly engineered system. The “logic” of the FAW J6P Engine Mount is to solve a core paradox: it must be a rigid “Torque Anchor” to secure the multi-ton engine, while also being a soft “NVH Damper” to isolate the cab from vibration.

The “Asymmetrical Logic” of this FAW J6P Engine Mount system, as revealed by the parts list, is its most critical design feature. The left and right front brackets are not identical (see P/N 1001031B50A vs. 1001032B50A). This is a deliberate engineering choice. The “torque-side” of the engine (which pushes *down* on compression) and the “lift-side” (which pulls *up*) experience different forces, requiring unique, non-interchangeable brackets. A failure in this system is not just an inconvenience; it leads to severe driver fatigue, component-destroying vibration, and potentially catastrophic failure of the cooling, exhaust, and transmission systems.

This technical guide is an essential resource for chassis technicians, fleet maintenance managers, and parts specialists. We will deconstruct the entire 18-component group into its four primary “logic” systems: the “Asymmetrical Front Support” logic (the brackets, cushions, and covers), the “Rear Torque Management” logic (the transmission-side supports), the “Structural Interface” logic (the adapter plates), and the all-important “Vibration-Proof Fastener” logic that holds this high-stress FAW J6P Engine Mount assembly together.

Core 1: The “Asymmetrical Front Support” Logic (Comp 2, 4, 5, 18)

This group forms the primary support for the engine block and is the core of the FAW J6P Engine Mount‘s vibration control. Its logic is based on non-symmetrical components to counteract engine torque.

1. The “Asymmetrical” Logic: ‘Left front mount bracket’ (1001031B50A) & ‘Right front mount bracket’ (1001032B50A)
This is the key. The parts list calls for one (1) ‘Left’ (Comp 2) and one (1) ‘Right’ (Comp 18) bracket. This “asymmetrical logic” is a direct response to engine torque. When the engine accelerates, it twists. One side of the FAW J6P Engine Mount system is under “compression” (being crushed), while the other is under “tension” (being pulled). These two brackets are engineered with different ribbing and reinforcement to handle these opposing, non-identical forces. They are not interchangeable.

2. The “Damping & Containment” Logic: ‘Front engine mount cushion assy’ (1001025B50A) & ‘Front… upper cover assy’ (1001030-76A)
This is the “working” part of the FAW J6P Engine Mount. The two ‘Cushion assy’ (Comp 5) are the engineered elastomer dampers. Their “logic” is to be “frequency-tuned” to the specific harmonic vibration of the FAW diesel engine, absorbing this energy and preventing it from reaching the frame. The ‘Upper cover assy’ (Comp 4) provides the “containment logic.” It is a “snubber” or “stop-loss” that prevents the engine from “jumping” too far on a hard bump, which would tear the rubber cushion.

Core 2: The “Rear Torque Management” Logic (Comp 13, 15, 16)

This group supports the rear of the powertrain (at the transmission/bell housing) and is primarily responsible for controlling engine “roll.” This part of the FAW J6P Engine Mount is critical for vehicle stability.

1. Component: ‘Rear support bracket cushion assy’ (1001065-50V)
This is the “Torque Management” core of the entire FAW J6P Engine Mount. The two (2) ‘Rear cushion’ assemblies (Comp 13) are the main defense against powertrain twist. Their “logic” is to be “anisotropic”—meaning they have different properties in different directions. They are engineered to be extremely *stiff* in the rotational axis (to resist engine “roll”) while simultaneously being *soft* in the vertical axis (to absorb vibrations, just like the front mounts). 2. The “Sandwich” Logic: ‘Base plate-rear mount’ (1001079-263) & ‘Upper plate-engine’ (1001063-483)
These components form the mounting “sandwich” for the rear cushions. The ‘Base plate’ (Comp 15) is the “chassis-side” interface, bolting to a frame cross-member and providing a wide, stable platform. The ‘Upper plate’ (Comp 16) is the “engine-side” interface, bolting to the transmission or flywheel housing. The ‘Rear cushion’ (Comp 13) is then installed between them. This heavy-duty interface logic is vital for the FAW J6P Engine Mount.

Core 3: The “Structural Interface” Logic (Comp 7, 10)

This group consists of the large adapter plates and brackets that physically join the “engine-side” components to the “chassis-side” components, completing the FAW J6P Engine Mount structure.

1. Component: ‘Engine front mount support’ (1001037B50A)
This is the primary “engine-side” adapter. The ‘Left’ and ‘Right’ front mount brackets (Comp 2 & 18) likely bolt *to* this “support” (Comp 7), which then provides the mounting face for the cushion (Comp 5). Its “logic” is to be the central, load-bearing component that unites the front mounting system. Its heavy-duty design is a key feature of the FAW J6P Engine Mount.

2. Component: ‘Lower plate-engine front mount’ (1001028-76A)
This is the “Chassis-Side” Logic. It is the counterpart to the engine brackets. This plate (Comp 10) bolts directly to the truck’s frame rails. The ‘Front mount cushion’ (Comp 5) is then “sandwiched” between this lower plate and the upper engine-side brackets. This “sandwich” logic is what allows the entire FAW J6P Engine Mount assembly to “float” on its rubber cushion while being securely contained.

Core 4: The “Vibration-Proof Fastener” Logic (All Hardware)

This final group is often overlooked but is absolutely critical to the safety and longevity of the FAW J6P Engine Mount. This is not a random assortment of bolts; it is a “fastening system” designed to combat constant, severe vibration.

1. The “Clamping Force” Logic: ‘Hexagon flange bolt’ (Comp 1, 3, 12, 17)
The “logic” of a “flange” bolt is that the flange is a built-in washer. This is critical for the FAW J6P Engine Mount. The flange distributes the bolt’s clamping force over a wide surface area, preventing the bolt head from digging into the softer steel of the frame or the cast brackets, which would create a stress point and lead to fatigue failure. The ‘R type’ stud bolt (Comp 3) is a specialized fastener, likely used for precise alignment before the nuts are torqued.

2. The “Anti-Vibration” Logic: ‘Tapered spring washer’ (CQ41910) & ‘Hexagon nut’ (CQ34010)
This is the first layer of vibration defense. A standard nut (Comp 9) will vibrate loose in minutes. Its “logic” is only complete when paired with the ‘Tapered spring washer’ (Comp 8). This washer is a “preload” device. When tightened, it is compressed, and its spring-like nature pushes back against the nut, creating a constant tension that prevents the nut from “backing off.” This is essential hardware for a FAW J6P Engine Mount. 3. The “Safety-Critical” Logic: ‘Type 1 all-metal… locking nut’ (Q32916, Q32918T)
This is the ultimate “safety” logic, used where a failure of the FAW J6P Engine Mount is not an option. These (Comp 11, 14) are not standard nuts. An “all-metal locking nut” has its threads intentionally deformed. The “logic” is that when the bolt passes through, it must “cut” into this deformed section, creating an incredibly tight, high-friction, “mechanical” lock. These nuts are designed to be *single-use* and will *not* back off, even under extreme vibration and heat.

FAW J6P Engine Mount Parts List & Specifications

The following tables provide the complete, detailed breakdown of all 18 component types and the core technical specifications for the FAW J6P Engine Mount assembly, as applied to the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Engine Mount system are defined by its critical role in NVH control and powertrain stability.