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5310990 Cummins Ignition Coil – Aftermarket
Source the 5310990 Cummins ignition coil from a reliable aftermarket supplier. RJT PARTS keeps steady stock of this fast-moving gas engine part and offers tiered pricing from 10 pieces up. Cross-references all seven Cummins numbers in one SKU. Ask for our distributor price list at info@rjtparts.com — bulk orders ship by air or sea.
5310990 Ignition Coil for Cummins 6CT ISC QSC ISL QSL Gas Engine | RJT PARTS
Product Overview
The 5310990 ignition coil serves as a direct-fit replacement for Cummins natural gas engines built on the 6CT, ISC, QSC, ISL, and QSL platforms. It steps up 12V battery current to the high voltage required for clean, consistent spark plug firing. RJT PARTS builds this coil to match the original Cummins electrical characteristics and mounting footprint.
This part belongs to the same coil family as the 3964547 and 5310989 units. However, Cummins released the 5310990 number as a later revision for specific engine calibrations. Therefore, always confirm your original part number against the cross-reference table below before ordering.
Every 5310990 coil from RJT PARTS undergoes bench testing for insulation integrity and spark output. We ship worldwide and support both single-unit repairs and bulk distribution orders.
Cross-Reference OEM Numbers
| OEM Number | Relationship to 5310990 | Common Fitment |
|---|---|---|
| 5310990 | Primary number | 6CT, ISC, QSC, ISL, QSL Gas |
| 5310989 | Same family, alternate revision | CGE8.3, 6CT, ISL, QSC |
| 3964547 | Earlier supersession | CGE8.3, 6CT, ISC, QSC, ISL, QSL |
| 3934684 | Older version | 6CT, ISC, QSC |
| 3608003 | Early release | 6CT Gas |
| 3930027 | Early release | CGE8.3, 6CT |
| 3928263 | Original release | 6CT Natural Gas |
Note: Several numbers in this family interchange physically. When in doubt, send us your engine serial number or a photo of the old coil. We confirm the exact match free of charge.
Compatible Cummins Engine Models
| Engine Series | Typical Applications | Fuel | Coils per Engine |
|---|---|---|---|
| 6CT / 6CTA8.3-G | Generators, pumps, industrial | CNG / LNG | 6 |
| ISC8.3 Gas | Trucks, buses, equipment | CNG / LNG | 6 |
| QSC8.3 Gas | Construction, agriculture | CNG / LNG | 6 |
| ISL8.9 / ISL G | City buses, refuse trucks | CNG / LNG | 6 |
| QSL9 Gas | Heavy-duty trucks, gensets | CNG / LNG | 6 |
Diesel engines do not use this part. This coil fits spark-ignited natural gas engines only.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Name | Ignition Coil |
| OEM Number | 5310990 |
| Cross References | 5310989, 3964547, 3934684, 3608003, 3930027, 3928263 |
| Engine Make | Cummins |
| Compatible Models | 6CT, ISC, QSC, ISL, QSL (Natural Gas) |
| Input Voltage | 12V DC |
| Output Type | High-voltage spark |
| Mounting | Bolt-on, OEM footprint |
| Connector | OEM-matching electrical plug |
| Quantity per Engine | 6 |
| Condition | New, aftermarket |
| Testing | 100% bench tested |
| Warranty | 12 months |
| Lead Time | 1–3 days (stock) |
Product Features
- Precision winding. Copper wire winding matches OEM resistance values for reliable spark energy.
- Epoxy-sealed housing. Resists moisture, vibration, and under-hood heat up to 150°C.
- Direct connector. Plugs into the original wiring harness — no splicing or adapters.
- Consistent performance. Maintains spark voltage from idle through full-load RPM.
- Cost-effective. Delivers dealer-level quality at a lower aftermarket price point.
Failure Symptoms — When to Replace
- Rough idle or hesitation under acceleration
- Engine misfire codes (P0300–P0306)
- Reduced fuel economy on gas-powered equipment
- Visible cracking, carbon tracking, or burn marks on the coil body
- Intermittent stalling when engine reaches operating temperature
Pro tip: If one coil fails on a high-hour engine, replace all six. Mixed-age coils cause uneven combustion and shorten the service life of the newer units. RJT PARTS offers a discounted 6-coil engine set.
Installation Notes
- Remove the negative battery cable.
- Clear access to the coil pack by removing intake piping or engine covers.
- Disconnect the electrical connector and remove the hold-down bolt.
- Pull the old coil straight off the spark plug.
- Apply dielectric grease inside the new coil boot before installation.
- Seat the new 5310990 coil and torque the mounting bolt to factory spec.
- Reconnect the harness, reinstall covers, and reconnect the battery.
- Clear fault codes and run the engine to confirm smooth operation.
Follow Cummins service manual lockout procedures for natural gas fuel systems before servicing.
Why RJT PARTS
RJT PARTS focuses on engine replacement parts for the global aftermarket. We understand that downtime costs money, so we keep the 5310990 coil and its cross-references on the shelf year-round.
- Verified fitment. We cross-check every order against Cummins part catalogs.
- Fast dispatch. In-stock orders leave our warehouse within 48 hours.
- Flexible quantities. Order one coil for a repair or 500 for distribution.
- Bulk discounts. Tiered pricing at 10, 50, and 100+ pieces.
- Global logistics. DHL, FedEx, air freight, and sea freight options.
- Technical support. Real parts specialists answer your fitment questions within 24 hours.
Custom Product Attributes
| Attribute | Value |
|---|---|
| Supplier | RJT PARTS |
| Part Name | Ignition Coil |
| OEM No. | 5310990 |
| Cross Ref. | 5310989, 3964547, 3934684, 3608003, 3930027, 3928263 |
| Engine Brand | Cummins |
| Engine Model | 6CT, ISC, QSC, ISL, QSL |
| Fuel Type | CNG / LNG (Natural Gas) |
| Voltage | 12V |
| Qty/Engine | 6 pcs |
| Condition | New Aftermarket |
| Warranty | 12 Months |
| MOQ | 1 pc |
| Shipping | DHL / FedEx / Air / Sea |
| Payment | T/T, PayPal, Western Union, Trade Assurance |
FAQ
Q: Will this coil fit a Cummins diesel engine?
A: No. The 5310990 fits natural gas (CNG/LNG) engines only. Diesel engines use compression ignition and do not require ignition coils.
Q: How many coils does my engine need?
A: All compatible engines listed above are 6-cylinder models, so they use 6 coils — one per cylinder.
Q: Do you sell this coil in a set of 6?
A: Yes. We offer a complete 6-coil engine set at a discounted price. Ask for the set pricing when you request a quote.
Q: What is the warranty?
A: 12 months from the date of delivery. We replace any coil that fails due to manufacturing defects.
Q: Can you ship to my country?
A: Yes. We ship to over 100 countries worldwide. Common destinations include Southeast Asia, the Middle East, Africa, South America, and Eastern Europe.
Request a Quote
Need the 5310990 ignition coil for a repair job or restocking order? RJT PARTS has it in stock and ready to ship.
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 with pricing and shipping options.
