Product Description
Interstate-McBee M-3901306 Camshaft Bushing – Non-Encore Block, 89–97 5.9L Cummins 12V
Precision, OEM-style camshaft bushing for Non-Encore B-series blocks used on 1989–1997 Dodge Ram 2500/3500 5.9L Cummins 12-valve (6BT). Designed as an aftermarket replacement for Cummins 3901306, this bushing supports the front cam journal to maintain proper oil clearance and stable valve-train operation.
- Direct-fit replacement: Matches OEM form/fit/function for Non-Encore blocks.
- Reliable sealing & support: Helps restore proper camshaft alignment and oil film.
- Aftermarket value: Interstate-McBee quality at a cost-effective price point.
- Typical quantity: One bushing required per engine (front cam bore on Non-Encore blocks).
Specifications
| Interstate-McBee Part # | M-3901306 |
|---|---|
| OEM Cross-Reference | Cummins 3901306 (replaces 3901305) |
| Block Type | Non-Encore B-Series (pre-1997.5) |
| Engine Family | Cummins 5.9L 12V 6BT; also used on select 4B/6B industrial applications |
| Install Location | Front camshaft bore (journal #1) |
| What’s Included | (1) Camshaft bushing |
Vehicle Fitment
Always verify by engine serial number (ESN) for best results.
- Dodge Ram 2500/3500 5.9L Cummins (12-Valve)
- 1989–1993 (VE rotary pump)
- 1994–1997 (P7100 “P-pump”)
- Industrial / Commercial: Select 4B/6B B-series engines (varies by ESN).
Helpful Notes
- Encore vs. Non-Encore: This bushing is for Non-Encore blocks (generally through 1997). Encore blocks (≈1997.5–2002) typically use cam bushing 3940059. Verify ESN before ordering.
- Quantity: Non-Encore 5.9L applications typically use one front cam bushing.
- Tooling: Use a proper cam bushing installer/driver; follow Cummins procedures for sizing and alignment.
Installation Tips
- Measure cam journal and installed bushing ID; confirm oil clearance per service manual.
- Align oil hole(s) precisely; press bushing square to bore using a dedicated installer.
- Lubricate on assembly; verify cam spins freely with no bind after install.
Warranty
Interstate-McBee new parts include manufacturer warranty coverage. For exact terms and claim process for this bushing, contact us with your order details.
Why Buy From CPP Diesel
- Diesel experts with ESN-verified fitment support
- Fast shipping and easy returns
- Huge B-series inventory to finish the job (cams, seals, gears, front covers)
FAQ
What does “Non-Encore” mean, and will this fit my truck?“Non-Encore” refers to earlier B-series blocks used roughly through the 1997 model year on 12-valve 5.9L engines. If your engine is 1989–1997 12V (VE or P-pump), this is the typical cam bushing. For 1997.5–2002 “Encore” blocks, a different bushing is usually required (see 3940059).
How many cam bushings does a 1989–1997 5.9L typically use?
Non-Encore 5.9L applications typically use one bushing at the front cam bore (journal #1). Check your manual and ESN.
Is special tooling required to install the bushing?
Yes. Use a cam bushing installer/driver and follow Cummins procedures. Professional press-in and sizing helps ensure proper clearance.
What’s the OEM part number cross-reference?
Cummins 3901306 (Interstate-McBee equivalent M-3901306).
What if I have an Encore block (late ’97.5–’02) or a billet cam?
Encore blocks generally use cam bushing 3940059. Billet cam applications on Encore also reference 3940059. Verify by ESN before ordering.
