Product Description
Interstate-McBee M-3947759 Valve Tappet – 03–18 5.9L/6.7L Cummins
OEM-style valve tappet (lifter) engineered by Interstate-McBee for 2003–2018 Dodge Ram 5.9L & 6.7L Cummins applications. Direct-fit design restores precise valve motion and durability at a fraction of OEM cost.
- Direct replacement: Matches Cummins geometry for drop-in fit and OE performance.
- Durable build: Premium materials and surface finish for long service life.
- Aftermarket value: Interstate-McBee quality with significant savings vs. OEM.
Specifications
| Interstate-McBee P/N | M-3947759 |
|---|---|
| OEM Cross-Reference | Cummins 3947759 (supersedes 4891226) |
| Engine Families | Cummins ISB / QSB (5.9L & 6.7L) |
| Sold As | Individual tappet (12 required per engine) |
| Position | Valve train lifter / cam follower |
What’s Included
- (1) Interstate-McBee valve tappet (M-3947759)
Vehicle Fitment
Always verify by engine serial number (ESN) for exact compatibility.
- Dodge Ram 2500/3500 with Cummins:
- 2003–2007 5.9L ISB (24-valve)
- 2007–2018 6.7L ISB (24-valve)
Install Notes
- Follow Cummins service manual procedures for cam/tappet inspection and reassembly.
- Use proper break-in and lubrication practices to maximize service life.
Warranty
Interstate-McBee new engine components include manufacturer warranty coverage. Contact us with your ESN for policy details on valve-train items.
Why Buy From CPP Diesel
- ESN-verified fitment support and tech guidance
- Fast shipping & easy returns
- Deep inventory of B-Series/ISB components for one-stop service
FAQ
Is this tappet a direct fit for 2003–2018 5.9L/6.7L Cummins?Yes. It’s listed for Dodge Ram models equipped with 5.9L or 6.7L Cummins engines covering 2003–2018. Verify by ESN for special builds.
How many tappets does my engine need?
These are sold individually. Most 5.9L/6.7L ISB applications require 12 tappets per engine.
What OEM number does M-3947759 replace?
Cummins 3947759 (commonly noted as superseding 4891226) in ISB/QSB applications.
Can I mix old and new tappets?
It’s best practice to replace tappets as a complete set when cam or lifter wear is present to ensure uniform break-in.
Product Videos
Custom Field
YEAR 2003-2018
MAKE DODGE
ENGINE 5.9L,6.7L
