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1003650711 Ignition Coil Assembly for WEICHAI
The 1003650711 ignition coil assembly (Torch R81326+W) is a direct replacement for Weichai WP13NG and WP13N China VI natural gas engines. It powers SHACMAN Delong, Sinotruk HOWO, and FAW JH6 CNG/LNG heavy trucks across Africa and Central Asia. Note: this coil fits WP13 only — it does not interchange with WP10/WP12 coils. RJT PARTS tests every unit before shipping, offers a 12-month warranty, and delivers worldwide in 3–7 days by express. Not sure if it fits? Send your old part number photo to info@rjtparts.com — we confirm within 24 hours.
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1003650711 Ignition Coil Assembly for WEICHAI WP13 Natural Gas Engine | RJT PARTS
Product Overview
The 1003650711 ignition coil assembly is the original-equipment spark unit for Weichai WP13 China VI natural gas engines. It steps up low-voltage battery current into the high-voltage spark that ignites the CNG or LNG mixture inside each cylinder. This part fits WP13NG engines installed in SHACMAN Delong, Sinotruk HOWO, and FAW JH6 natural gas heavy trucks.
RJT PARTS supplies the 1003650711 coil as a direct-fit aftermarket replacement. It matches the original electrical connector and mounting dimensions, so your technician installs it straight out of the box. Every unit passes bench testing for insulation resistance and spark output before we ship it.
Weichai WP13NG engines deliver 430–530 HP and serve as the flagship gas powertrain for long-haul trucks in China and export markets. For example, Nigerian logistics fleets run WP13NG trucks on CNG, and Central Asian operators use them for intercity freight. Therefore, demand for reliable replacement coils grows as these fleets age.
Cross-Reference Part Numbers
| Part Number | Brand | Notes |
|---|---|---|
| 1003650711 | Weichai | Primary OEM number |
| R81326+W | Torch (火炬) | Aftermarket equivalent, same coil |
| 1000264408 | Weichai | Related assembly number (coil + boot) |
| F6T558 | Aftermarket | Third-party equivalent |
Important: 1003650711 fits the WP13 China VI natural gas engine only. It does not interchange with the WP10/WP12 Bosch coil (0281005866) or the Woodward OH6 coil (1698-1231). Always confirm your engine displacement and emission standard before ordering.
Compatible Engine Models
| Engine Series | Displacement | Power Range | Common Applications | Fuel | Coils per Engine |
|---|---|---|---|---|---|
| Weichai WP13NG | 13L | 430–530 HP | Long-haul heavy trucks, tractors | CNG / LNG | 6 |
| Weichai WP13N | 13L | 460–560 HP | Heavy trucks, China VI | CNG / LNG | 6 |
Common vehicle brands:
- Trucks: SHACMAN Delong X3000/X5000, Sinotruk HOWO, FAW JH6, Foton Auman
Emission standard: China VI
Diesel WP13 engines do not use this part. This coil fits spark-ignited natural gas (CNG/LNG) versions only. Diesel engines use compression ignition.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Name | Ignition Coil Assembly |
| OEM Number | 1003650711 (Weichai) |
| Cross Reference | R81326+W (Torch), 1000264408, F6T558 |
| Engine Make | Weichai |
| Compatible Models | WP13NG, WP13N (China VI Natural Gas) |
| Input Voltage | 24V DC |
| Output Type | High-voltage spark, smart coil |
| Mounting | Bolt-on, cylinder head mounted, one per cylinder |
| Connector | Weichai-spec electrical connector |
| Quantity per Engine | 6 |
| Packaging Size | approx. 40 × 15 × 15 cm |
| Condition | New, aftermarket |
| Certification | ISO9001 |
| Testing | 100% bench tested |
| Warranty | 12 months |
| Lead Time | 1–3 days (stock) |
Key Features
- WP13 flagship fit. Designed for Weichai’s highest-power natural gas truck engine.
- Torch cross-reference. Replaces Torch R81326+W — a widely recognized aftermarket number.
- China VI compliant. Matches the emission system of late-model WP13 gas trucks.
- 24V heavy-duty design. Built for the electrical systems of long-haul heavy trucks.
- Assembly format. Includes coil and boot for complete replacement.
Failure Symptoms — When to Replace
- Engine misfire under load or at highway speed
- Check engine light with misfire codes (P0300–P0306)
- Increased gas consumption (higher CNG/LNG usage)
- Rough idle or hesitation on acceleration
- Loss of power on gradients or with full loads
- ECM reports ignition coil faults
- Visible cracks, carbon tracking, or burn marks on the coil body
Fleet tip: WP13NG trucks running 100,000+ km per year put heavy stress on ignition components. Replace all six coils during a major tune-up to avoid repeated breakdowns on long routes. RJT PARTS offers discounted 6-coil engine sets.
Installation Notes
- Disconnect the battery before starting work.
- Remove the engine cover and any intake piping blocking the coil pack.
- Unplug the electrical connector from the faulty 1003650711 coil.
- Remove the hold-down bolt and pull the coil straight off the spark plug.
- Compare the old coil with the new unit to confirm matching dimensions and connector orientation.
- Apply dielectric grease to the inside of the new coil boot before installation.
- Seat the new coil and torque the mounting bolt to Weichai factory specification.
- Reconnect the harness and battery. Clear fault codes and start the engine to verify smooth operation.
Follow Weichai service manual lockout/tagout procedures for natural gas fuel systems before servicing.
Why RJT PARTS
RJT PARTS supplies engine replacement parts to truck fleets and distributors worldwide. We know that downtime costs revenue, so we keep the 1003650711 coil and its cross-references on the shelf year-round.
- Verified fitment. We cross-check every order against Weichai and Torch part catalogs.
- One SKU, multiple numbers. Order this part and it covers 1003650711, R81326+W, and 1000264408.
- Fast dispatch. In-stock orders leave our warehouse within 48 hours of payment.
- Flexible quantities. Order one coil for a repair or a full carton for fleet stock.
- Bulk discounts. Tiered pricing at 10, 50, and 100+ pieces.
- Worldwide shipping. DHL, FedEx, air freight, and sea freight to over 100 countries.
- Technical support. Send your engine nameplate or old part number — we confirm the match within 24 hours.
Custom Product Attributes
| Attribute | Value |
|---|---|
| Supplier | RJT PARTS |
| Part Name | Ignition Coil Assembly |
| OEM No. | 1003650711 |
| Cross Ref. | R81326+W (Torch), 1000264408, F6T558 |
| Engine Brand | Weichai |
| Engine Model | WP13NG, WP13N |
| Emission Standard | China VI |
| Vehicle Brands | SHACMAN, Sinotruk HOWO, FAW JH6, Foton |
| Fuel Type | CNG / LNG (Natural Gas) |
| Voltage | 24V |
| Qty/Engine | 6 pcs |
| Certification | ISO9001 |
| Condition | New Aftermarket |
| Warranty | 12 Months |
| MOQ | 1 pc |
| Shipping | DHL / FedEx / Air / Sea |
| Payment | T/T, PayPal, Western Union, Trade Assurance |
FAQ
Q: Is 1003650711 the same as Torch R81326+W?
A: Yes. Torch manufactures the R81326+W as an aftermarket equivalent to the Weichai 1003650711 ignition coil. Both numbers refer to the same physical component.
Q: Does this coil fit a WP10 or WP12 engine?
A: No. The 1003650711 fits the WP13 China VI natural gas engine only. WP10 and WP12 engines use different coils (0281005866 for Bosch system, 1698-1231 for Woodward OH6 system).
Q: How many coils does a WP13NG engine need?
A: The WP13 is a 6-cylinder engine, so it uses 6 ignition coils — one per cylinder.
Q: Will this coil fit a SHACMAN CNG truck?
A: Yes. Many SHACMAN Delong X3000/X5000 natural gas trucks use the Weichai WP13NG engine and the 1003650711 ignition coil. Sinotruk HOWO and FAW JH6 gas trucks also use this coil.
Q: Does this coil fit diesel engines?
A: No. The 1003650711 fits natural gas (CNG/LNG) engines only. Diesel engines use compression ignition and do not require ignition coils.
Q: What is the warranty?
A: 12 months from the date of delivery. We replace any coil that fails due to manufacturing defects.
Q: Do you ship to Nigeria, Kenya, or Central Asia?
A: Yes. We ship worldwide, including Nigeria, Kenya, Tanzania, Kazakhstan, Uzbekistan, and many other countries where Weichai WP13NG trucks operate.
Request a Quote
Need the 1003650711 ignition coil for a Weichai WP13 natural gas truck? RJT PARTS has it in stock and ready to ship. One SKU covers Weichai, Torch, and related part numbers.
Send your part number, quantity, and destination country to info@rjtparts.com, or message us on WhatsApp for an instant quote. We reply within 24 hours.
📧 info@rjtparts.com
💬 WhatsApp: +86 17882454252
