FAW Russian Cylinder Head Assembly2: 19 Vital Components Engineered for Arctic Seal Integrity

The FAW Russian Cylinder Head Assembly2 focuses on the critical sealing and fastening architecture of the CA3250P66K24L1TE5Z engine. Unlike the main casting, this sub-assembly manages the gaskets, bolts, and sensor covers required to maintain compression. It is the final defense against fluid leaks in the harsh freeze-thaw cycles of the Russian Federation.

FAW Russian Cylinder Head Assembly2

Sealing Architecture: Gaskets and O-Rings

The core mission of the FAW Russian Cylinder Head Assembly2 is containment. The primary barrier is the Cylinder Head Gasket Assembly (Part No. 1003020-81D).

In the Russian Arctic, engines undergo extreme contraction overnight. A standard gasket would shear under this movement. This specific component uses a Multi-Layer Steel (MLS) design.

The layers are coated with a specialized fluoro-elastomer. This allows the head and block to move independently on a microscopic level while maintaining a gas-tight seal for peak combustion pressure.

Preventing oil leaks at the rear of the cam valley is the Cylinder Head Seal Half Circle (Part No. 1003042-81D). This semi-circular plug fills the machining bore left by the line-boring process.

It is crafted from a heat-resistant rubber that does not shrink after years of exposure to 100°C engine oil. Shrinkage here would result in a messy oil leak down the back of the engine block.

Fluid systems are further secured by the Hydraulic pneumatic O-ring rubber seal (Part No. CQ7341170A). This seal handles auxiliary fluid connections.

FAW specifies a high-grade compound for this O-ring to prevent “explosive decompression” or swelling. Swollen seals can block critical oil passages, starving downstream components in the FAW Russian Cylinder Head Assembly2.

Clamping Force: Bolts and Protective Covers

The integrity of the head gasket relies entirely on the Cylinder Head Bolt (Part No. 1003047-53D). There are 26 of these bolts in the assembly, and they are engineered as Torque-to-Yield (TTY) fasteners.

When tightened to spec, these bolts permanently stretch into their elastic region. This creates a “spring-like” clamping force that accommodates the thermal expansion of the FAW Russian Cylinder Head Assembly2 without loosening.

Because they stretch permanently, these bolts are single-use items. Reusing them is a critical error that will lead to a blown head gasket within kilometers of an overhaul.

To protect the internal gear train, the system uses the Gear Chamber Cover Plate (Part No. 1003051-81D). This stamped steel cover prevents road grit and ice from entering the timing gears.

It is sealed with a dedicated Gasket – Gear Chamber Cover Plate (Part No. 1003052-81D). In Russian operations, salt spray is a major concern; this gasket prevents corrosive brine from seeping into the gear housing.

Similarly, the intake system is sealed by the Intake Manifold Cover Plate (Part No. 1008018-81D) and its corresponding Gasket (Part No. 1008019-81D). These ensure that the turbocharger’s boost pressure reaches the cylinders rather than leaking into the atmosphere.

Precision Support: Bearings and Sensor Interfaces

Supporting the rotating camshaft are the bearing shells: Camshaft Upper Tile/Bearing Shell (Part No. 1003072-81D) and Camshaft Lower Tile/Bearing Shell (Part No. 1003073-81D).

These split bearings are lined with a sacrificial babbitt material. This soft lining allows any microscopic debris in the oil to embed itself into the bearing wall rather than scoring the camshaft journal.

This feature is vital in the FAW Russian Cylinder Head Assembly2 during cold starts, where oil filter bypass valves may open, allowing unfiltered oil to circulate briefly.

Engine timing data is managed via the Camshaft Gear Sensor Cover Assembly (Part No. 1003090-81D). This rigid cover provides a stable mounting platform for the phase sensor.

Vibration at this point would cause “signal noise,” confusing the ECU regarding the camshaft’s position. This leads to erratic injection timing and poor fuel economy in the FAW Russian Cylinder Head Assembly2.

Small details matter. The Copper Washer (Part No. Q/WC3403-94) is used on banjo connections. It crushes to form a perfect metal-to-metal seal, essential for leak-free hydraulic lines in sub-zero temperatures.

Component Breakdown List

The table below details the official Bill of Materials (BOM) for the FAW Russian Cylinder Head Assembly2. Fleet managers should verify these part numbers during top-end overhauls to ensure full compatibility with the CA3250P66K24L1TE5Z.

Diagnostic Indicators for Sealing Failures

Effective diagnosis of the FAW Russian Cylinder Head Assembly2 often starts with the coolant. If you detect oil in the expansion tank, the Cylinder Head Gasket Assembly may be compromised near the high-pressure oil feed.

Conversely, white exhaust smoke indicates coolant entering the cylinder. In Arctic conditions, this is often due to the reuse of old Cylinder Head Bolt fasteners which have lost their clamping yield.

Pay close attention to the Front Lifting Eye – Cylinder Head. While structural, loose bolts here can induce vibration.

This vibration can propagate stress cracks into the head casting. Regularly checking the torque on these accessible bolts is a simple preventative measure.

Inspect the Camshaft Gear Sensor Cover Assembly for external oil leaks. A leak here can foul the cam sensor.

This leads to hard starting in cold weather. Always replace the Gasket – Gear Chamber Cover Plate whenever this cover is removed.

Conclusion: The Importance of Genuine Seals

The FAW Russian Cylinder Head Assembly2 is the unsung hero of the engine’s power stroke. It ensures that the pressures created by combustion are harnessed, not wasted.

Every component, from the Cylinder Head Seal Half Circle to the main gasket, is engineered for specific thermal expansion rates.

For fleet operators, the choice is clear. Genuine FAW parts provide the assurance of a perfect fit and long-term durability. Using inferior gaskets in the FAW Russian Cylinder Head Assembly2 is a gamble that inevitably leads to downtime in the unforgiving Russian climate.