Product Description
Interstate-McBee M-4892797 Lower Connecting Rod Bearing – .030" (0.75 mm) – 2003–2018 Cummins 5.9L/6.7L
The Interstate-McBee M-4892797 is a .030" (0.75 mm) undersize lower connecting rod bearing shell engineered for Cummins ISB 5.9L (2003–2007) and ISB 6.7L (2007.5–2018) applications with fracture-split (cracked-cap) rods. It’s an OEM-style aftermarket replacement designed for precision oil clearance after a .030" undersize crank grind.
- Correct undersize: .030" (0.75 mm) to match a journal ground .030" under standard.
- Lower shell only: Sold per bearing shell; order quantity per rod and pair with the matching upper.
- Cracked-cap compatible: Fits fracture-split rods commonly used on 2003+ ISB engines.
- OEM-style fit: Built to meet factory form, fit, and function for reliable sealing and long service life.
- Value vs. OEM: Interstate-McBee quality at a lower cost than genuine Cummins boxed parts.
Specifications
| Interstate-McBee P/N | M-4892797 |
|---|---|
| OEM Cross-Reference | Cummins 4892797 (Lower, .030" / 0.75 mm) |
| Mating Upper Shell (.030") | Cummins 4932377 (order separately) |
| Size | .030" undersize (0.75 mm) |
| Position | Connecting rod bearing – lower shell |
| Sold As | Per shell (typical engine requires 6 lowers + 6 uppers) |
| Engine Families | Cummins B-Series ISB/QSB |
Vehicle Fitment
Verify by engine serial number (ESN) when possible.
- Dodge/Ram 2500-5500 w/ Cummins
- ISB 5.9L (Common-Rail): 2003–2007
- ISB 6.7L: 2007.5–2018
- Industrial/Equipment: QSB 5.9/6.7 and other B-Series variants where 4892797 applies.
Install Notes
- .030" undersize bearings require a crankshaft rod journal ground .030" under standard.
- Measure housing bore and journal; set oil clearance per Cummins specs; use assembly lube.
- Pair with matching upper shell (see 4932377 for .030").
- Follow the Cummins service manual for torque and angle sequence.
Why Buy From CPP Diesel
- ESN-verified fitment support for ISB/QSB engines.
- Fast shipping, easy returns, diesel-only expertise.
- Inventory of complementary parts: rod bolts, main/rod sets, oil & head gaskets.
FAQ
Is this the lower bearing only?Yes. M-4892797 is the lower shell. Order six lowers and six matching uppers for a full engine (one pair per rod).
Which upper bearing matches this .030" lower?
Use the .030" upper shell cross-ref Cummins 4932377 (sold separately).
Will it fit both 5.9L (03–07) and 6.7L (07.5–18)?
Yes—this size and style is used on ISB B-Series with fracture-split rods across those model years. Always confirm by ESN.
What does “.030" undersize” mean?
The crank rod journal is ground .030" (0.75 mm) smaller than standard. Bearings are sized to restore proper oil clearance.
Torque specs?
Refer to the Cummins service manual for your ESN, including any angle-torque updates.
