371-1005015
Product Details
1. Basic Overview & Core Functional Positioning
The 371-1005015 Crankshaft Stop Washer, also commonly known as crankshaft thrust washer or thrust bearing plate, is an authentic OEM precision engine component exclusively designed and calibrated for the Chery X22 Pro model series. As a tiny yet critical load-bearing and limiting part of the engine crankshaft rotating assembly, this washer is installed at the designated fourth main bearing seat of the engine cylinder block, serving as the core axial limiting component for the crankshaft. Unlike radial bearings that support rotational movement, this stop washer specializes in controlling the axial displacement of the crankshaft, solving the axial floating and shifting problems caused by engine alternating load, torque impact, and transmission reaction force during operation.
In engine operation, the high-speed rotating crankshaft is prone to forward and backward axial movement due to piston reciprocating inertia, gear meshing reaction force, and sudden acceleration or deceleration load changes. Without effective restriction, excessive crankshaft axial play will cause abnormal friction between the crankshaft thrust surface, cylinder block, and connecting rod components, leading to severe mechanical wear, deviated valve timing, unstable engine operation, and even internal component collision failure. The 371-1005015 stop washer accurately limits the crankshaft axial clearance within the factory standard range, maintains precise spatial positioning of the entire crank-linkage mechanism, ensures consistent engine rotation accuracy, and effectively stabilizes engine idle quality, power output linearity, and overall mechanical balance.
The part number 371-1005015 is a dedicated exclusive specification for Chery X22 Pro engine platforms, with precise thickness tolerance, outer diameter dimension, and oil groove layout uniquely matching the X22 Pro crankshaft thrust surface and cylinder block mounting groove. It is not interchangeable with thrust washers of other Chery models or general aftermarket gaskets. Manufactured strictly in accordance with Chery original factory standards and IATF 16949 automotive quality system certification, every dimensional parameter and friction performance index meets engine precision assembly requirements. Compared with low-precision aftermarket washers that feature uneven thickness, poor flatness, and easy wear, the genuine 371-1005015 stop washer maintains long-term stable limiting accuracy and friction resistance, avoiding common engine faults such as crankshaft jitter, abnormal noise, and power attenuation caused by inferior washer failure.
2. Material Selection & Manufacturing Standards
The 371-1005015 Crankshaft Stop Washer adopts high-standard automotive-grade bimetallic composite materials, specially developed to adapt to extreme engine working conditions including high-speed friction, high-temperature oil immersion, alternating axial impact load, and long-term cyclic stress. The base layer is made of high-strength low-carbon steel back with excellent structural rigidity and tensile strength, which is not easy to deform or bend under long-term axial pressure, ensuring overall flatness and structural stability of the washer. The surface friction layer adopts high-performance copper-lead alloy anti-friction coating, featuring ultra-low friction coefficient, outstanding high-temperature wear resistance, and excellent oil film adhesion performance.
Different from ordinary single-layer iron gaskets, the composite structure of this genuine stop washer balances structural strength and lubrication performance. The surface alloy layer can effectively resist high-speed dry friction and mechanical scuffing, while the steel back provides reliable compression resistance and deformation resistance. The product undergoes precision flat grinding and surface finishing treatment, with ultra-tight dimensional tolerance and flatness control, ensuring perfect fitting degree with the crankshaft thrust surface and cylinder block groove. Meanwhile, the surface is designed with precision oil storage grooves, which can stably retain engine oil to form a continuous protective oil film, avoiding dry friction and metal direct contact during crankshaft operation.
All finished 371-1005015 stop washers pass strict multi-channel factory quality inspections, including thickness tolerance detection, flatness precision testing, surface smoothness inspection, high-temperature wear fatigue testing, and oil film retention performance verification. Each batch of products undergoes engine bench simulation operation testing to verify wear resistance and structural stability under full-load and long-term operation conditions. The standardized production process eliminates defective products with uneven thickness, burrs, or unqualified oil grooves, ensuring that each genuine washer has consistent precision, stable friction performance, and ultra-long service life, fully meeting the long-duration and high-reliability operation requirements of Chery X22 Pro engines.
3. Structural Composition & Working Principle
The 371-1005015 Crankshaft Stop Washer features a mature and reliable flat plate modular structure with precision oil groove distribution, belonging to the standard auxiliary bearing structure of Chery X22 Pro engine crankshaft system. The overall structure is simple and compact, mainly composed of high-strength steel back base, anti-friction alloy working surface, and symmetrical oil storage groove area. The overall thickness is strictly calibrated according to the X22 Pro engine assembly standard, with smooth and burr-free edges, ensuring accurate assembly gap and no assembly jamming. The symmetrical structural design realizes balanced stress bearing on both sides, avoiding unilateral eccentric wear and tilt deformation.
Its core working principle relies on mechanical limit matching and hydrodynamic lubrication protection. After professional installation, the washer is fixed in the cylinder block thrust groove, with the smooth oil groove surface facing the crankshaft thrust surface and the flat steel back closely attached to the cylinder block. During engine operation, the tiny gap between the washer and the crankshaft forms a stable hydrodynamic oil film under the circulation of engine oil. This oil film isolates metal-to-metal contact, greatly reduces friction resistance and wear, and absorbs instantaneous axial impact force generated by crankshaft operation. At the same time, the washer’s precise thickness and flatness strictly restrict the crankshaft’s forward and backward floating range, ensuring that the crankshaft only performs stable radial rotation without axial displacement deviation.
The optimized oil groove layout of the 371-1005015 washer effectively improves the efficiency of engine oil circulation and storage, ensuring sufficient lubrication at all engine speeds from idle to high-speed operation. It solves the problem of insufficient local lubrication and easy ablation of ordinary flat washers under high-load working conditions. Through dual functions of mechanical limit and lubrication protection, it stabilizes the assembly position of the crankshaft, ensures the precise coordination of piston, connecting rod and valve train mechanisms, and maintains the accurate timing and compression ratio of the engine, supporting stable power output and low-friction operation of the X22 Pro engine.
Contact us
Leave your messages
