Product Description
Interstate-McBee M-3942915 Filter Head Gasket – 1997–2002 5.9L Cummins (Aftermarket Replacement)
Direct-fit replacement gasket for the fuel filter head on 5.9L Cummins engines. Restores a proper seal between the filter head and its mating surface to help prevent fuel seepage and air intrusion. Sold individually.
- OE-reference: Matches Cummins reference 3942915 for correct form and fit.
- Leak fix: Replaces aged, flattened, or torn seals that can cause hard-starts and fuel odors.
- Durable materials: Built to OE-equivalent sealing performance.
- Easy service: Install during filter head service or when evidence of fuel weeping is present.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3942915 |
| OEM Reference | Cummins 3942915 |
| Component | Fuel filter head / housing gasket |
| Sold As | Each (1 gasket) |
Vehicle Fitment
Always verify by engine serial number (ESN) or parts catalog for your specific application.
- Dodge Ram 2500/3500 with 5.9L Cummins
- Model Years: 1997–2002
- Engine: 5.9L Cummins (B-Series)
- Other B-Series applications where Cummins 3942915 is specified.
What’s Included
- (1) Filter head gasket, P/N M-3942915
Recommended/Related Service Items
- Fuel filter element
- Filter head O-rings and sealing washers (banjo bolt/crush washers)
- Fuel lines inspected for cracks or abrasion
Install Notes
- Clean both mating surfaces thoroughly; remove old gasket material and residue.
- Lightly lubricate the new gasket with clean diesel or appropriate assembly lube if specified.
- Torque mounting fasteners to factory spec in a cross pattern.
- Prime the fuel system and check for leaks with the engine running.
Why Buy From CPP Diesel
- Diesel specialists with ESN-verified fitment support
- Fast shipping and easy returns
- Wide selection of B-Series fuel system parts
FAQ
Will this fix a small fuel seep at the filter head?
In many cases, yes—if the seep originates at the filter head sealing surface. Inspect for cracks or damaged hardware and replace related seals as needed.
How many do I need?
Quantity is one per filter head.
Does this include the fuel filter or other seals?
No. This listing is for the filter head gasket only. Add a fresh fuel filter and any crush washers/O-rings required for a complete service.
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