WEIYE Machinery

Custom Engine Parts Manufacturing — OEM & ODM Services

Can't find the part you need in our catalog? We manufacture custom diesel engine components based on your drawings, samples, or specifications. From one-off prototypes to full production runs.

Customization Options

Choose the approach that best fits your needs.

Drawing-Based Custom

Provide technical drawings (CAD, PDF, or DXF) and we manufacture parts to your exact specifications. Ideal when you have precise dimensional requirements.

Sample-Based Custom

Send us a physical sample and we will reverse-engineer it with full dimensional analysis. Best for parts where original drawings are unavailable.

Full Custom Development

From concept to finished part — our engineering team works with you to design and develop new components tailored to your application.

What We Can Customize

Our custom manufacturing covers a wide range of engine components.

  • Cylinder liners and liner kits
  • Pistons and piston rings
  • Crankshafts and camshafts
  • Cylinder heads and engine blocks
  • Fuel injection pumps and injectors
  • Gaskets and seals (custom dimensions)
  • Brackets, mounts, and adapters

Our Custom Parts Process

A transparent, step-by-step workflow from inquiry to delivery.

StepPhaseTimelineDescription
1InquiryDay 1Submit your drawings, samples, or specifications with quantity requirements.
2Engineering Review1-3 DaysOur engineers evaluate feasibility, materials, and tooling requirements.
3Quotation2-5 DaysReceive a detailed quote with pricing, lead time, and technical notes.
4Sample Production7-20 DaysWe produce samples for your review and approval before bulk manufacturing.
5Sample Approval3-7 DaysYou inspect and test samples. Revisions are made if needed at no extra cost.
6Bulk Production15-45 DaysFull production run with in-process quality checks at every stage.
7Inspection & Shipping3-5 DaysFinal QC inspection, packing, and shipment with full documentation.

Production Parameters

Key specifications for our custom manufacturing capabilities.

Minimum Order Quantity10-50 pieces (depending on complexity)
MaterialsCast iron, ductile iron, forged steel, aluminum alloy, bronze
Manufacturing ProcessesCNC machining, casting, forging, grinding, honing
Dimensional TolerancesUp to ±0.01 mm (depending on process)
Sample Lead Time7-20 days after drawing/sample approval
Bulk Lead Time15-45 days after sample approval

Quality Assurance

Every custom part undergoes the same rigorous 4-stage quality control process as our catalog products. From raw material inspection to final pre-shipment verification, we ensure every component meets your specifications.

Our quality team provides dimensional inspection reports, material certificates, hardness test results, and — upon request — video inspection of finished parts before shipping. We stand behind every part we produce with our standard 12-month warranty against manufacturing defects.

For custom parts, we also perform first-article inspection (FAI) on initial samples and in-process checks during bulk production to maintain consistency across your entire order.

Start Your Custom Part Project

Send us your drawings, samples, or specifications and our engineering team will evaluate feasibility and provide a detailed quotation.