FAW J6P Turbocharger System Logic: 10 Critical Components for Flawless Forced Induction

Welcome to this definitive technical analysis of the FAW J6P Turbocharger System (Main Assy P/N 1118010-22E). This is the “forced induction” assembly for the engine on the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

This is the single most critical component for engine power, torque, and efficiency.

It is a “Logic Assembly” of 10 component types, all engineered to perform one task: to use “waste” exhaust gas to force a massive volume of compressed fresh air into the engine, allowing it to burn more fuel and create immense power.

The “Life Support Logic” is the key to understanding this FAW J6P Turbocharger System. A turbocharger spins at over 100,000 RPM and operates at extreme temperatures (over 800°C). It has no conventional bearings. Instead, its “Center Housing Rotating Assembly” (CHRA) *floats* on a “hydrodynamic” film of high-pressure engine oil. This “oil logic” means the turbocharger has two critical support systems: a “Pressure Inlet Logic” (‘Turbocharger oil inlet pipe’, Comp 3) that feeds it clean oil, and a “Thermal Drain Logic” (‘Turbocharger oil return pipe’, Comp 7) that allows the superheated oil to drain away. A failure in this “life support” system—a blocked oil feed or a kinked oil drain—is the number one cause of FAW J6P Turbocharger System failure. The oil will “coke” (burn), seizing the bearing and destroying the turbo in seconds. This entire assembly is engineered for flawless, high-pressure fluid flow.

This expert guide is an essential resource for engine technicians, fleet managers, and parts specialists. We will deconstruct the entire 10-component-type group. We will analyze the “Dual-Sided Logic” (the main turbocharger assembly itself), the “Critical Lubrication Logic” (the oil inlet and return pipes), and the “High-Temp Sealing & Fastener Logic” (the specialized gaskets, studs, and nuts) that allow the FAW J6P Turbocharger System to function.

Core 1: The “Dual-Sided” Logic (The Turbocharger Core, Comp 4)

This is the “core” of the FAW J6P Turbocharger System. It is a single, pre-balanced assembly that is, in itself, two components in one.

1. Component: ‘Turbocharger assy’ (1118010-22E)
This (Comp 4) is the complete FAW J6P Turbocharger System unit. It consists of a “hot” side and a “cold” side, joined by a center “CHRA.”

2. The “Hot Side” (Turbine) Logic:
The “Turbine Housing” is the “engine” of the turbo. It is made of high-temperature, cast iron alloy. Its “logic” is to be the “inlet” for the hot exhaust gas coming from the ‘Exhaust Manifold’ (Chapter 14). This high-pressure, high-velocity gas “pulse” spins the “turbine wheel” (made of exotic alloys like Inconel) at speeds exceeding 100,000 RPM. This “Energy Recovery Logic” is what makes the FAW J6P Turbocharger System so efficient; it’s “powered for free” by waste energy. 3. The “Cold Side” (Compressor) Logic:
The “Compressor Housing” is the “air pump.” It is made of lightweight cast aluminum. Its “logic” is to be the “outlet” for the system. The turbine wheel spins a central shaft, which spins a “compressor wheel” on the cold side. This wheel sucks in fresh, clean air (from the air filter) and compresses it, forcing it *into* the engine’s intake manifold. This “Forced Induction Logic” is what crams 1.5x or 2x the normal amount of air into the cylinders, allowing for a massive increase in fuel injection and, therefore, horsepower and torque.

4. The “Bearing” (CHRA) Logic:
The “Center Housing Rotating Assembly” (CHRA) is the “heart” that joins the hot and cold sides. Its “Hydrodynamic Logic” means the central shaft “floats” on a film of high-pressure engine oil. This is *not* a ball bearing. This is why the oil feed (Comp 3) and oil drain (Comp 7) are the life-support system for the FAW J6P Turbocharger System. A failure of either will cause the 100,000 RPM shaft to instantly seize.

Core 2: The “Critical Lubrication” Logic (Components 3, 7)

This group represents the “life-support” system for the FAW J6P Turbocharger System. 99% of all turbo failures are caused by a failure in one of these two components.

1. Component: ‘Turbocharger oil inlet pipe assy’ (1118060A263)
This (Comp 3) is the “Pressure Feed Logic.” Its “logic” is to be a high-pressure, rigid steel pipe that “taps” clean, pressurized oil directly from the ‘FAW J6P Engine Oil Cooler’ module. This pipe’s *small* diameter is intentional; it is a “restrictor” that controls the *volume* of oil fed to the CHRA. Its “Filtration Logic” is that it *must* receive perfectly clean oil. Any debris from a failed oil filter will be “injected” into the hydrodynamic bearing, destroying the FAW J6P Turbocharger System. 2. Component: ‘Turbocharger oil return pipe assy’ (1118080A263)
This (Comp 7) is the “Gravity Drain Logic.” This is arguably more critical than the inlet pipe. This pipe’s “logic” is to be a *large-diameter*, non-restrictive “drain.” The oil that is fed into the CHRA is instantly superheated by the 100,000 RPM shaft. This “Thermal Siphon Logic” means the hot, non-pressurized, “foamy” oil *must* be able to drain away *immediately* via gravity, returning to the oil pan. A failure here (a kinked hose, a clogged pipe, or an improper install) is the #1 killer of a FAW J6P Turbocharger System. If the oil cannot drain, it “backs up” in the CHRA. The heat “cokes” the oil (burns it into a solid carbon sludge), which seizes the bearing. It also blows out the turbo’s internal seals, causing massive oil leaks into both the intake (blue smoke) and the exhaust (white smoke).

Core 3: The “Sealing & Fastener” Logic (All Others)

This final group’s “logic” is to provide a secure, vibration-proof, and *leak-proof* mounting for the FAW J6P Turbocharger System and its fluid lines.

1. The “Hot-Side” Logic (Components 5, 8)
These are the “High-Temperature” fasteners.

• ‘Nut-turbocharger’ (1118073-29D): These four (4) nuts (Comp 5) are the “Clamping Logic” for the “hot side.” They are made of high-temperature, “locking” steel that will not loosen under 800°C+ heat and extreme vibration.
• ‘Hex flange stud bolt’ (Q1840816): These four (4) bolts (Comp 8) are listed in this group, but are often confused with the “studs” (from Chapter 14). These “studs” are threaded into the ‘Exhaust Manifold’. The FAW J6P Turbocharger System slides onto them, and the ‘Nuts’ (Comp 5) lock it down. This “Stud Logic” is superior because it prevents seizing and provides a more accurate torque reading.

2. The “Fluid Sealing” Logic (Components 2, 6, 9)
These are the “Gasket Logic” components that prevent leaks.

• ‘Gasket-turbocharger’ (1118091-29D): This (Comp 6) is the “Hot-Side Seal.” It is a “Multi-Layer Steel” (MLS) gasket that sits between the ‘Exhaust Manifold’ and the ‘Turbine Housing’. Its “logic” is to contain the 800°C, high-pressure exhaust gas.
• ‘Copper gasket 12×18′ (Q/WC3403-1994) & ’14×20’ (Q/WC3403-1994): These (Comp 2 & 9) are the “Oil Sealing Logic.” These are *not* rubber. They are single-use “crush washers” for the “hollow bolts” (banjo bolts) on the ‘Oil inlet pipe’ (Comp 3) and ‘Oil return pipe’ (Comp 7). Their “logic” is that the soft copper *deforms* when tightened, creating a perfect, high-pressure, high-heat seal for the oil lines. Re-using these is a guarantee of a leak.

3. The “Clamping Bolt” Logic (Components 1, 10)
These two ‘Clamping bolts’ (Comp 1 & 10) are the “Service Fastener Logic.” They are likely used to secure the ‘Oil return pipe’ (Comp 7) flange to the oil pan, or to secure a bracket. They are a critical part of ensuring the “Gravity Drain Logic” of the FAW J6P Turbocharger System is secure and leak-free.

FAW J6P Turbocharger System Parts List & Specifications

The following table provides the complete, detailed breakdown of all 10 component types identified in this FAW J6P Turbocharger System assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Turbocharger System are defined by its function as the engine’s primary forced induction and power-multiplying unit.