Dongfeng LoongGine Engine parts Turbocharger gasket 1118101-E4600

As a critical sealing component between the turbocharger and engine cylinder head, this gasket’s core function is to prevent leakage of high-temperature exhaust gas and high-pressure air—two key media in the turbocharging system. It adopts a "multi-layer compression sealing principle": the gasket’s flexible material structure deforms slightly under the torque of mounting bolts (recommended torque: 25-30 N·m), filling tiny gaps on the flange surfaces of the turbocharger and cylinder head. This creates a tight, continuous seal that blocks exhaust gas leakage (which would reduce turbocharging efficiency) and prevents high-pressure compressed air from escaping (which would cause power loss). Additionally, it isolates the high-temperature exhaust side (up to 800℃) from the low-temperature air intake side, avoiding heat transfer that could damage intake system components

To withstand extreme turbocharging conditions, the gasket uses a high-performance composite material structure and advanced manufacturing processes:

Core Material: Composed of stainless steel (304) sandwich layers (2-3 layers) for structural stability, combined with a graphite coating (thickness: 0.1-0.2 mm) on both surfaces. The stainless steel provides high temperature resistance and mechanical strength, while the graphite offers excellent flexibility and sealing performance, even with minor flange surface irregularities.

Manufacturing Process: Adopts CNC stamping and laser cutting for dimensional accuracy, with tolerance controlled within ±0.05 mm—ensuring perfect alignment with mounting holes and flange edges. The graphite coating is applied via electrostatic spraying, ensuring uniform thickness and strong adhesion (no peeling even after 50+ thermal cycles).

Edge Treatment: The gasket’s edges are deburred and rounded to prevent damage to flange surfaces during installation and avoid material fatigue caused by sharp edges

This turbocharger gasket is designed to meet the rigorous demands of turbocharged engine operation, with key performance parameters including:

Temperature Resistance: Sustains stable sealing performance at temperatures ranging from -40℃ to 850℃—covering the full temperature spectrum of LoongGine engine turbochargers (from cold starts to full-load operation).

Pressure Resistance: Withstands a maximum pressure of 1.2 MPa (for both exhaust gas and compressed air), exceeding the typical operating pressure of LoongGine turbocharging systems (0.6-0.9 MPa) to ensure safety margin.

Chemical Resistance: Resists corrosion from engine oil, coolant, and exhaust gas byproducts (e.g., sulfur oxides), with no degradation after 1000-hour exposure to standard engine fluids.

Service Life: Maintains effective sealing for over 60,000 km under normal operating conditions, reducing the frequency of maintenance and replacement

The gasket is primarily applied in Dongfeng LoongGine-powered vehicles and machinery, including:

Dongfeng heavy-duty trucks (e.g., Dongfeng Kinland, Tianlong series) used for long-distance cargo transportation;

Specialized commercial vehicles such as concrete mixers and tankers (where engines operate under continuous high load);

Large engineering machinery like LoongGine-equipped excavators and wheel loaders (exposed to dusty, high-vibration environments).

In terms of installation, it offers significant advantages:

Direct Replacement: Matches the original gasket’s size, shape, and mounting configuration—no modifications to the turbocharger or cylinder head are required, and installation can be completed with standard hand tools in 30-45 minutes.

Installation Guidance: The gasket’s surface is printed with a "TOP" mark to indicate the correct mounting direction, preventing reverse installation (which would cause severe leakage).

Cost-Effectiveness: As an OEM-compatible part, it provides the same sealing performance as original Dongfeng LoongGine gaskets at a competitive price, reducing maintenance costs for fleet operators and repair shops