Product Description
Interstate-McBee M-3902332 Camshaft Woodruff Key – 1989–2018 5.9L & 6.7L Cummins
OE-style woodruff key for locating the camshaft gear on Cummins B-Series engines. Ensures precise cam timing and secure gear indexing during assembly or timing service. Sold individually.
- Direct replacement: Matches the geometry of the factory camshaft key for proper fit.
- Accurate timing: Restores positive cam gear location to maintain correct valve timing.
- Durable construction: Quality aftermarket part from Interstate-McBee for dependable service life.
- Great for overhauls: Ideal when replacing a worn, damaged, or missing key during timing or head work.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3902332 |
| OEM Reference | Cummins 3902332 |
| Component | Camshaft woodruff key |
| Sold As | Each (1 key) |
Vehicle/Engine Fitment
Always confirm by engine serial number (ESN) when possible.
- Cummins 5.9L B-Series (1989–2007, 12-valve & 24-valve)
- Cummins 6.7L B-Series (2007.5–2018)
- Other B-Series applications where Cummins 3902332 is specified
What’s Included
- (1) Camshaft woodruff key, P/N M-3902332
Install Notes
- Clean the camshaft keyway and gear slot; remove burrs or debris before installation.
- Seat the key fully in the camshaft keyway; align the gear carefully and press on straight.
- Verify cam timing marks according to the Cummins service manual before rotating the engine.
Recommended/Related Parts
- Camshaft gear
- Camshaft retaining bolt and washer
- Front cover gasket & seal kit
- Timing pin / barring tool (for timing verification)
FAQ
How many keys are required?
One key is used to locate the camshaft gear on B-Series engines. This listing is for one (1) key.
Will this fit both 5.9L and 6.7L Cummins?
Yes, this key is used across many B-Series applications including 5.9L (1989–2007) and 6.7L (2007.5–2018). Confirm by ESN when possible.
Is this an OEM Cummins part?
No. It’s an aftermarket replacement by Interstate-McBee designed to meet OE form and function.
