Ensemble de culasse FAW J6P: La déconstruction ultime à 4 cœurs

Welcome to this definitive technical analysis of the Ensemble de culasse FAW J6P (Main Assy P/N 1003010A59D), le “control room” for the engine powering the FAW Jiefang CA3250P66K2L1T1E 6×4 diesel dump truck. This is the single most complex casting in the powertrain. Le “logique” de la Ensemble de culasse FAW J6P is threefold: to seal combustion, manage all engine “breathing” (airflow), and house the entire valvetrain and engine brake system.

Le “thermal and fluid logic” of this Ensemble de culasse FAW J6P is critical to its survival. It manages the hottest, most violent part of the combustion process. To do this, it is engineered with an intricate, cast-in “water jacket” (coolant passages) that are designed to flow the maximum amount of coolant around the exhaust valve seats and injector bores, preventing the head from warping or cracking. Simultanément, c'est “airflow logic” is defined by its intake and exhaust ports, which are not simple holes; they are shaped to induce “swirl” et “tumble” in the intake air, a key factor in achieving an efficient, powerful, and clean diesel combustion. A proper-functioning Ensemble de culasse FAW J6P is paramount to engine performance.

This expert guide is an essential resource for engine rebuilders, fleet technicians, et spécialistes des pièces détachées. We will deconstruct the entire 20-component group, breaking it down into four primary “logique” systèmes: le “Main Structural Assembly” (the head itself), le “Valvetrain Housing” Logique (the covers and engine brake frame), the critical “Scellage & Interface” Logique (the gaskets), et le “Critical Fastener & Utilitaire” Logic that holds the entire Ensemble de culasse FAW J6P system together.

Cœur 1: Le “Structural & Frein moteur” Logique (Composants 7, 9)

This group contains the functional core of the entire Ensemble de culasse FAW J6P. All other parts exist to support, joint, or attach to these.

1. Composant: ‘Cylinder head assy’ (1003010A59D)
Ce (Comp 9) is the main casting, the functional heart of the Ensemble de culasse FAW J6P. C'est “logique structurelle” is to be the “upper half” of the engine, creating the top of the combustion chamber. C'est “deck” (the bottom, flat surface) is machined to a mirror-flat, precise finish to create a perfect seal against the ‘Cylinder head gasket’ (Comp 14) and the FAW Cylinder Block. C'est “airflow logic” is its most complex feature, containing the intake and exhaust ports for all six cylinders. These passages are engineered to optimize the flow of air and exhaust, which is a primary factor in the engine’s horsepower and emissions. A failure (like a crack or warp) in this single component is a catastrophic failure for the entire engine, making this Ensemble de culasse FAW J6P a zero-compromise part.

2. Composant: ‘Cylinder head cover lower frame assy’ (1003060A48D)
Ce (Comp 7) is the most specialized part of this Ensemble de culasse FAW J6P. The list specifies this “lower frame” is for models “with engine brake.” C'est le “Engine Brake Logic.” UN “Jake Frein” system works by using high-pressure oil to open the exhaust valves at the wrong time (on the compression stroke), turning the engine into an air compressor to slow the truck. This ‘Lower frame’ is not just a spacer; it is a complex “manifold” that houses the high-pressure oil solenoids and passages for this system. Le “without engine brake” variante (1003060-621-000Z) is a simple, non-functional frame.

Cœur 2: Le “Valvetrain Cover & Scellage” Logique (Composants 5, 6, 8)

This group’s “logique” is to cover and seal the top of the Ensemble de culasse FAW J6P, protecting the valvetrain and sealing the oil inside.

1. Composants: ‘Cylinder head cover assy’ (1003030B29d) & ‘Seal strip’ (1003041B29d)
C'est le “valve cover.” C'est “logique d'étanchéité” is simple but crucial: it must keep the engine’s lubricating oil *in* and keep dirt, eau, and debris *out*. The ‘Cylinder head cover’ (Comp 5) acts as the primary “roof.” The ‘Seal strip’ (Comp 6) is the engineered rubber gasket that fits in a groove on the cover or frame. It is designed to be compressed to a specific degree to create a perfect, oil-tight seal that can also withstand the engine’s vibrations.

2. Composant: ‘Composite seal gasket’ (1003047-29D)
This gasket (Comp 8) est le “high-pressure seal” for the engine brake system. Il fournit le “interface logic” between the ‘Lower frame’ (Comp 7) and the main ‘Cylinder head assy’ (Comp 9). It must seal both the low-pressure oil “splash” from the valvetrain *and* the high-pressure oil that is fed into the engine brake manifold. A failure here would cause the engine brake to stop working and lead to an internal or external oil leak. This seal is vital to the Ensemble de culasse FAW J6P‘s advanced functions.

Cœur 3: Le “Scellage & Interface” Logique (Composants 13, 14, 15, 17, 18)

This group contains the single most critical “sealing” component in the entire engine, as well as the gaskets that interface with the air manifold.

1. Composant: ‘Cylinder head gasket assy’ (1003020-36D)
Ce (Comp 14) is the single most important “logique” seal in the engine. C'est “multi-seal logic” is extreme: it must simultaneously perform three non-negotiable sealing tasks. 1) **Combustion Sealing:** It uses “fire rings” to contain 2500+ PSI of combustion pressure and heat. 2) **Coolant Sealing:** It seals the water jacket, preventing high-pressure coolant from leaking out or (pire) into the cylinders. 3) **Oil Sealing:** It seals the high-pressure oil gallery that feeds the Ensemble de culasse FAW J6P, preventing it from leaking into the coolant or out of the engine. This is a Multi-Layer Steel (MLS) joint, and its failure is catastrophic.

2. Composants: ‘Intake’ Joints & Covers (Comp 13, 15, 17, 18)
C'est le “air interface logic.” The ‘Gasket-intake pipe’ (Comp 13) provides the seal for the main air connection *to* the Ensemble de culasse FAW J6P‘s intake ports. The ‘Intake manifold right cover’ (Comp 18) and its associated gaskets (Comp 15 & 17 – note the two different part numbers, suggesting a design change or different materials) have a “service logic.” They likely block off an access port on the intake side of the head, which might be used for sensors or different manifold configurations on other models.

Cœur 4: Le “Critical Fastener & Utilitaire” Logique (All Others)

This final group’s “logique” is to provide the immense clamping force and service points required to make the Ensemble de culasse FAW J6P fonction.

1. Composant: ‘Bolt-Cylinder head’ (1003046-36D)
C'est le “Critical Clamping Logic.” La liste réclame 26 de ceux-ci (Comp 1). These are *not* standard bolts. They are “Torque-to-Yield” (TTY) boulons. Leur “logique” is that they are designed to be torqued to a specific point where they *permanently stretch*, acting like a massive, high-tension spring. This is the only way to provide the enormous and perfectly *even* clamping force needed to hold the Ensemble de culasse FAW J6P flat against the block. They are *single-use by definition* and MUST be replaced every time the head is serviced.

2. Composant: ‘Damping bolt assy’ (1003110-29D)
C'est le “Valvetrain Fastener Logic.” With a quantity of 17 (Comp 4), these are almost certainly the bolts that secure the rocker arm shafts or individual rocker pedestals to the main Ensemble de culasse FAW J6P casting. Le “amortissement” description (ou “Boulon combiné” alternative) suggests they are engineered to provide a secure fit while possibly reducing valvetrain “clatter” and improving NVH.

3. Composants: ‘Front lifting eye’ (1003058-29D) & ‘Bolt’ (1003057-29D)
C'est le “Service Logic.” Le Ensemble de culasse FAW J6P is extremely heavy and must be lifted perfectly straight up to avoid damaging the block. The ‘Lifting eye’ (Comp 10) and its specific ‘Bolt’ (Comp 11) provide a load-rated, engineered attachment point for an engine crane, ensuring safe and proper service. The other flange bolts (Comp 2, 3, 12, 16, 19, 20) sont les “auxiliary logic,” used to secure all the covers, frames, and brackets to the Ensemble de culasse FAW J6P.

FAW J6P Cylinder Head Assembly Parts List & Caractéristiques

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 20 component types identified in this Ensemble de culasse FAW J6P group for the FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau.

Spécifications de base

Les spécifications pour le Ensemble de culasse FAW J6P are defined by its function as the “control room” of the engine, managing air, carburant, and heat.