Product Description
Interstate-McBee M-3901306 Non-Encore Block Cam Bushing – 1989–1997 5.9L Cummins 12-Valve
OE-style replacement camshaft bushing for non-Encore 5.9L Cummins B-series engine blocks used in 1989–1997 Dodge Ram 2500/3500 (12-valve 6BT). Built to OE form, fit, and function for reliable cam support and oiling.
- Direct replacement: Matches OE dimensions and oiling features for non-Encore blocks.
- Durable construction: Designed for long service life in stock or mild-build applications.
- Service friendly: Press-fit design; install with appropriate driver and verify alignment.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3901306 |
| Application | 5.9L Cummins 12-valve (Non-Encore block) |
| Model Years | 1989–1997 (verify by ESN) |
| Position | Camshaft bushing (engine block) |
| Sold As | Each (1 bushing) |
What’s Included
- (1) Camshaft bushing, P/N M-3901306
Vehicle/Engine Fitment
Always verify by engine serial number (ESN) and block casting to confirm non-Encore configuration.
- Dodge Ram 2500/3500 with 5.9L Cummins 12-valve 6BT (1989–1997)
- Other B-series applications specifying Cummins ref. 3901306
Install Notes
- Clean and inspect the cam tunnel; check for scoring and out-of-round.
- Press in bushing squarely using the correct driver; align oil feed holes per the service manual.
- After installation, measure I.D. and verify camshaft running clearance; line-hone if required.
- Lubricate during assembly and rotate the cam by hand to confirm free movement.
Recommended/Related Parts
- Camshaft (12-valve 6BT)
- Cam thrust plate / retainer hardware
- Front and rear main seals, timing cover gasket set
- Engine assembly lube and installation tools (cam/bushing driver)
Why Buy From CPP Diesel
- Knowledgeable diesel parts support and ESN-verified fitment help
- Fast shipping and easy returns
- Wide inventory of Cummins B-series engine components
FAQ
What does “Non-Encore block” mean?
It refers to early 5.9L B-series blocks that use different oiling/fitment details than later Encore-style blocks. Check your ESN and block casting before ordering.
How many bushings do I need?
This listing is for one (1) cam bushing. Some engines use multiple bushings—consult the Cummins service manual for your specific build.
Will this fit my 1998 12-valve?
Fitment here is listed as 1989–1997. For edge cases around model-year changes, verify by ESN and block style (Encore vs. Non-Encore).
