Product Description
Interstate-McBee M-4932375 Rod Bearing – .010" Undersize (Upper) – 1989–2002 5.9L Cummins
Upper shell connecting rod bearing for the 1989–2002 5.9L Cummins B-series (12-valve and 24-valve). Designed as an OE-style replacement with .010" undersize (0.25 mm) to match reground crankshaft journals. Sold individually as the upper shell.
- OE form & fit: Engineered to meet factory clearances on properly machined journals.
- .010" undersize (0.25 mm): Intended for use after crankshaft journal regrind to the first undersize.
- Upper shell only: Pair with the matching lower shell to complete each rod journal.
- Interstate-McBee quality: Trusted aftermarket solution for Cummins rebuilds.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4932375 |
| Component | Connecting Rod Bearing (Upper Shell) |
| Undersize | .010" (0.25 mm) |
| Sold As | Each (one upper shell) |
| Qty Required | 6 uppers per engine (one per connecting rod) |
| Engine | 5.9L Cummins B-Series (12V/24V) |
| Years | 1989–2002 |
| Position | Upper (rod side/oil groove side as applicable) |
What’s Included
- (1) Upper connecting rod bearing shell, .010" undersize – P/N M-4932375
Vehicle Fitment
Always verify by engine serial number (ESN) and bearing size before ordering.
- Dodge Ram 2500/3500 with 5.9L Cummins B-Series
- 12-Valve: 1989–1998
- 24-Valve: 1998.5–2002
- Additional B-Series industrial/ag applications using the 5.9L platform with .010" undersize rods (confirm by ESN).
Recommended/Related Parts
- Matching lower rod bearing shell, .010" undersize (sold separately)
- Standard-size or other undersize rod bearings (as required by crankshaft machine work)
- Main bearing set (size to match crank mains)
- Rod bolts/nuts, assembly lube, plastigage for clearance checks
Install Notes
- Confirm crankshaft journal size is .010" (0.25 mm) undersize on rods.
- Cleanliness is critical; keep all oil passages and bearing surfaces lint-free.
- Lubricate bearing surfaces and verify oiling holes/grooves align correctly.
- Torque rod bolts to factory spec and check bearing clearance with plastigage.
- Do not mix upper and lower shells; use correct orientation and size on each journal.
Why Buy From CPP Diesel
- Diesel-specialist support for Cummins rebuilds
- Fast shipping and competitive pricing
- Wide selection of complementary B-Series engine components
FAQ
Is this the correct bearing for my engine?
This is the upper connecting rod bearing shell in .010" undersize. Verify by ESN and crankshaft journal size (.010" undersize on rods) before ordering.
Do I need six or twelve pieces?
You need six uppers and six lowers total—one pair per connecting rod. This listing is for the upper shell only.
Will this fit both 12-valve and 24-valve 5.9L Cummins?
Yes, for 1989–2002 5.9L Cummins B-Series applications that require .010" undersize rod bearings. Always confirm by ESN and crankshaft measurements.
What if my crank is standard size?
Use standard-size bearings instead. Undersize bearings are only for reground journals matching that undersize.
