Premium Replacement, Overhaul & Aftermarket Solutions
Weichai pistons are heavy-duty internal components engineered for diesel power systems, designed to convert high-pressure combustion forces into mechanical power and reliably transfer loads through the piston pin and connecting rod to the crankshaft.
For wholesale and commercial replacement-parts procurement, selecting the correct piston requires rigorous technical alignment beyond simple outside diameter measurements. Critical parameters including the engine model, piston part number, compression height, pin dimensions, ring-groove configuration, and crown geometry must precisely match the target engine application.
We supply robust Weichai piston solutions tailored for engine repair, major overhauls, aftermarket distribution, and bulk procurement. To ensure zero-defect installation, all technical details and application compatibility are cross-verified before issuing a formal quotation.
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![Piston for Weichai WD615 Engine]()
Piston for Weichai WD615 EngineYuwei Piston is specially developed and manufactured for Weichai WD615 series engines, as a core component for reciprocating motion in the engine cylinder. It converts thermal energy from fuel combustion into mechanical energy, directly...view more -
![Piston for Weichai WP10 Engine]()
Piston for Weichai WP10 EngineYuwei Pistons are specially designed for Weichai WP10 series engines, covering six core models: 612600030047, 612640020034, 612600030068, 612600030024, VG1246030001, and 612650020002. As a core component of the engine cylinder, it...view more -
![Piston for Weichai WP12 Engine]()
Piston for Weichai WP12 EngineYuwei Piston is specially designed for Weichai WP12 engine, including four core models: 612630020152, 1000076563, 612600030108 (for WD615.67) and 612600030116. As a core cylinder component, it transmits power, seals gas and conducts...view more -
![Piston for Weichai WP13 Natural Gas Engine]()
Piston for Weichai WP13 Natural Gas EngineYuwei Pistons (Models: 612700020016, 612700020004, WP13NG Special Edition) are core components designed for Weichai WP13 natural gas engines. They match the engines’ high combustion temperature and low emission characteristics, enhance...view more -
![Piston for Weichai WP7 Engine]()
Piston for Weichai WP7 EngineThe Yuwei Piston (Model: 610800030035) is a core power component specifically engineered for Weichai WP7 series engines. As a pivotal element in the engine's reciprocating motion, it directly transmits gas pressure and drives the...view more
Weichai Piston At A Glance
|
Item |
Specification / Detail |
|
Product |
Weichai Diesel Engine Piston (Including popular series like WD615, WP10, WP12, WP13, etc.) |
|
Product Type |
Engine Internal Component / Heavy-Duty Replacement Piston |
|
Primary Application |
Diesel Engine Repair, Major Overhaul & Global Aftermarket Distribution |
|
Target Buyers |
Importers, Diesel Parts Distributors, Wholesalers, Engine Rebuilders & Repair Networks |
|
Selection Basis |
Engine Model, OEM Part Number, Precise Dimensions & Equipment Application |
|
Supply Capabilities |
Sample Orders, Small Batches, and Long-Term Regular Bulk Commercial Orders |
|
Technical Verification |
Mandatory pre-quotation review for 100 percent compatibility |
How to Identify the Correct Weichai Piston
A piston should never be selected solely by bore diameter. Different engine series and emission tiers can require varying compression heights, combustion bowl configurations, ring-groove arrangements, and pin specifications.
To achieve a reliable product match, buyers should provide as much of the following information as available:
Engine Information
Engine manufacturer and exact model (e.g., Weichai WD615, WP10, WP12).
Engine series and emission standard.
Equipment or vehicle application (e.g., Heavy-duty trucks, construction excavators, agricultural tractors, industrial generators).
Number of cylinders.
Piston Technical Information
Original Equipment (OEM) part number.
Existing piston casting numbers or markings.
Bore diameter and piston outer diameter (skirt size).
Compression height and overall piston height.
Piston pin diameter and length.
Ring groove dimensions (width, depth, and total number of grooves).
Piston crown and combustion bowl geometry profile.
Clear photographs of the existing piston (top, skirt, and inner pin bore).
Commercial and Order Requirements
Required order quantity and delivery schedule.
Sample requirement (Yes or No).
Packaging and labeling requirements.
Destination market and shipping method.
Key Technical Parameters for Piston Selection
|
Parameter |
Description & Engineering Significance |
|
Piston Diameter & Skirt Profile |
Establishes compatibility with the cylinder bore. Skirt clearance must align with thermal expansion design to prevent scuffing or seizure. |
|
Compression Height |
Dictates the exact top-dead-center position relative to the cylinder head, directly affecting the compression ratio and combustion efficiency. |
|
Piston Pin Dimensions |
Handles intense reciprocating loads. Pin diameter, length, and pin-bore design must correspond with the connecting rod. |
|
Ring Groove Configuration |
Acts as a sealed system for gas containment, oil scraping, and heat transfer. Groove width and depth must match the piston rings. |
|
Crown Geometry & Combustion Bowls |
Forms part of the combustion chamber. Bowl profiles and valve reliefs vary across engine generations; visual similarity does not guarantee fit. |
Piston Material Quality and Manufacturing Precision
Pistons operate under severe cyclic thermal and mechanical stress. Our manufacturing partners implement strict metallurgical controls to ensure dimensional stability and extended service life:
Advanced Alloy Specification
High-grade aluminum-silicon alloys selected for optimal thermal resistance and low thermal expansion.
Manufacturing Process
Precision casting or forging, followed by state-of-the-art heat treatment.
Machining Accuracy
CNC-controlled turning and boring for skirts, pin bores, crown profiles, and ring grooves, coupled with specialized surface treatments or coatings where applicable.
Typical Production Flow
Material Preparation -> Forming -> Heat Treatment -> Rough Machining -> Precision Machining -> Ring Groove Machining -> Pin-Bore Machining -> Finishing -> Dimensional Inspection -> Final Inspection -> Export Packaging
Rigorous Quality Control for Commercial Supply
To guarantee reliability in heavy-duty commercial operations, our quality control process focuses on measurable metrics across every production batch:
Incoming Material Control
Metallurgical verification of raw alloy materials.
01
Process Inspection
In-line dimensional checks during CNC machining phases.
02
Final Dimensional Inspection
Strict verification of critical tolerances against approved engineering drawings.
03
Visual Surface Inspection
Screening for microscopic casting defects, surface damage, or non-conformities.
04
Batch Consistency Control
Ensuring stable, repeatable specifications across repeat bulk orders for distributors and engine rebuilders.
05
Target Applications and Industry Sectors
Commercial Vehicle Maintenance: Heavy-duty trucks and buses powered by Weichai engines operating under demanding long-haul conditions across key global trade corridors (Southeast Asia, Middle East, Africa, and South America).
Construction and Mining Machinery: Excavators, loaders, and heavy equipment operating in high-load, dusty environments.
Agricultural Machinery: Tractors and harvesters serviced through regional aftermarket networks.
Industrial Diesel Generators: Stationary power systems requiring dependable, scheduled overhaul components.
Engine Rebuilding and Overhaul: Professional shops requiring precise dimensional matching and reliable replacement kits.
Who Buys Weichai Pistons?
Engine Parts Importers
Seeking reliable repeat supply, stable batch specifications, and dependable lead times.
Diesel Parts Distributors
Requiring precise cross-reference data for multi-application inventories to minimize error rates.
Engine Rebuilding Companies
Needing technical drawings, sample validations, and exact dimensional compatibility.
Wholesale Spare Parts Suppliers
Focusing on competitive pricing, flexible minimum order quantities, long-term supply stability, and robust packaging.
Professional Export Packaging and Logistics Protection
Diesel engine pistons are vulnerable to moisture, impact, and surface scratching during international transit, especially across global ocean freight lanes. Our export-grade packaging standards include:
Individual anti-corrosion protective wrapping and individual inner boxes.
Master cartons designed to withstand rough sea or air freight handling.
Palletized and shrink-wrapped options fully compliant with international shipping regulations (ISPM 15 heat-treated pallets).
Flexible global shipping capabilities (FOB and CIF terms, sea freight, air cargo, and express sample dispatch) tailored to international distributors.
Customizable packaging and private labeling options available for bulk distributors.
Weichai Piston FAQ
As one of the most professional weichai piston manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized weichai piston made in China here from our factory. Also, quotation is available.
1000076563, 612700020004, 612600030010 WD615E2
