Product Description
Interstate-McBee M-4932376 Rod Bearing – .020 Under Size | 1989–2002 5.9L Cummins
Premium .020" undersize (0.50 mm) connecting rod bearing from Interstate-McBee for 1989–2002 5.9L Cummins B-Series (12-valve 6BT and early 24-valve ISB). Engineered to OEM-style specs to restore proper oil clearance on reground journals and deliver durable, quiet operation.
- Direct replacement: OEM-style geometry for precise fit on 5.9L B-Series rods.
- Correct sizing: .020" undersize journal / 0.50 mm oversize bearing shell to match a .020" crank regrind.
- Reliable materials: Proven tri-metal construction for strength, conformability, and longevity.
- Aftermarket value: Interstate-McBee quality at a lower cost than OEM boxed parts.
Specifications
| Brand | Interstate-McBee |
|---|---|
| Part Number | M-4932376 |
| OEM Cross-Reference | Cummins 4932376 (supersedes 3901172 in many B-Series applications) |
| Size | .020" undersize (0.50 mm) |
| Position | Connecting rod bearing (pair/shells) |
| Engine Family | Cummins B / ISB 5.9L (some 3.9L/industrial B-Series also—verify by ESN) |
Vehicle Fitment
Always verify by Engine Serial Number (ESN) for exact compatibility.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1993 12-Valve 6BT
- 1994–1998 12-Valve 6BT (P-pump)
- 1998.5–2002 24-Valve ISB
- Additional B-Series: May fit 4BT/6BT industrial, ag, and equipment engines when specified by ESN.
What’s Included
- (1) Connecting rod bearing set/shells in .020" undersize (0.50 mm)
Install Notes
- Measure crankpin journals; confirm they are reground to .020" under. Check housing bore and side clearance.
- Cleanliness is critical—any debris can shorten bearing life.
- Lubricate during assembly; torque rod bolts to spec; verify oil clearance with plastigage or micrometer method.
- Follow the Cummins service manual for torque and sequence.
Warranty
Interstate-McBee new engine parts typically include manufacturer warranty coverage. Contact us with your ESN for model-specific warranty details.
Cross-Reference & Supersession
Equivalent to Cummins 4932376; commonly replaces earlier B-Series reference 3901172 in many applications. Always confirm by ESN.
Why Buy From CPP Diesel
- ESN-verified fitment support from real diesel techs
- Fast shipping & easy returns
- One-stop rebuild sourcing (mains, rings, pistons, gaskets, rods)
FAQ
Is this the right size for my crank?Choose .020" undersize bearings only if your crankpin journals are ground .020" under standard. Measure or confirm with your machine shop.
Does .020" undersize mean the bearing or the journal?
It refers to the journal being .020" smaller than standard after a regrind. The bearing shell is the matching 0.50 mm oversize to restore factory oil clearance.
Will this fit both 12-valve and early 24-valve 5.9L?
Yes—this M-4932376 bearing is listed for 1989–2002 5.9L B-Series (12V and early 24V). Verify by ESN for edge cases.
Is there an OEM Cummins number?
The OEM cross is 4932376; earlier listings may show 3901172 as superseded for many B-Series applications.
